List of airports by ICAO code: K

K – United States
The prefix K is generally reserved for the contiguous United States. The ICAO codes for these airports are usually the FAA location identifier prefixed with a K. IATA codes are listed where applicable. Cities shown are those associated with the airport as per the FAA, this may not always be the exact location as airports are often located in smaller towns outside the cities they serve.

Format of entries is:
 * ICAO (IATA) – Airport Name – Airport Location (U.S. city and state)

KA

 * KAAA – Logan County Airport – Lincoln, Illinois
 * KAAF (AAF) – Apalachicola Regional Airport – Apalachicola, Florida
 * KAAO – Colonel James Jabara Airport – Wichita, Kansas
 * KAAS – Taylor County Airport – Campbellsville, Kentucky
 * KAAT – Alturas Municipal Airport – Alturas, California
 * KABE (ABE) – Lehigh Valley International Airport – Allentown, Bethlehem and Easton, Pennsylvania
 * KABI (ABI) – Abilene Regional Airport – Abilene, Texas
 * KABQ (ABQ) – Albuquerque International Sunport – Albuquerque, New Mexico
 * KABR (ABR) – Aberdeen Regional Airport – Aberdeen, South Dakota
 * KABY (ABY) – Southwest Georgia Regional Airport – Albany, Georgia
 * KACB (ACB) – Antrim County Airport – Bellaire, Michigan
 * KACJ – Jimmy Carter Regional Airport (formerly Souther Field) – Americus, Georgia
 * KACK (ACK) – Nantucket Memorial Airport – Nantucket, Massachusetts
 * KACP – Allen Parish Airport – Oakdale, Louisiana
 * KACQ – Waseca Municipal Airport – Waseca, Minnesota
 * KACT (ACT) – Waco Regional Airport – Waco, Texas
 * KACV (ACV) – Arcata-Eureka Airport – Arcata, California
 * KACY (ACY) – Atlantic City International Airport – Atlantic City, New Jersey
 * KACZ – Henderson Field – Wallace, North Carolina
 * KADC – Wadena Municipal Airport – Wadena, Minnesota
 * KADF – Dexter B. Florence Memorial Field – Arkadelphia, Arkansas
 * KADG (ADG) – Lenawee County Airport – Adrian, Michigan
 * KADH (ADT) – Ada Municipal Airport – Ada, Oklahoma
 * KADM (ADM) – Ardmore Municipal Airport – Ardmore, Oklahoma
 * KADS (ADS) – Addison Airport – Addison, Texas
 * KADT – Atwood–Rawlins County City–County Airport – Atwood, Kansas
 * KADU – Audubon County Airport – Audubon, Iowa
 * KADW (ADW) – Andrews Air Force Base – Camp Springs, Maryland
 * KAEG – Double Eagle II Airport – Albuquerque, New Mexico
 * KAEJ – Central Colorado Regional Airport – Buena Vista, Colorado
 * KAEL (AEL) – Albert Lea Municipal Airport – Albert Lea, Minnesota
 * KAEX (AEX) – Alexandria International Airport – Alexandria, Louisiana
 * KAFF (AFF) – United States Air Force Academy Airfield – Colorado Springs, Colorado
 * KAFJ (WSG) – Washington County Airport – Washington, Pennsylvania
 * KAFK – Nebraska City Municipal Airport – Nebraska City, Nebraska
 * KAFN (AFN) – Jaffrey Airport – Silver Ranch Airpark – Jaffrey, New Hampshire
 * KAFO (AFO) – Afton Municipal Airport (Afton-Lincoln County Airport) – Afton, Wyoming
 * KAFP – Anson County Airport – Wadesboro, North Carolina
 * KAFW (AFW) – Fort Worth Alliance Airport – Fort Worth, Texas
 * KAGC (AGC) – Allegheny County Airport – West Mifflin, Pennsylvania
 * KAGO (AGO) – Magnolia Municipal Airport – Magnolia, Arkansas
 * KAGR – MacDill AFB Auxiliary Field – Avon Park, Florida
 * KAGS (AGS) – Augusta Regional Airport at Bush Field – Augusta, Georgia
 * KAGZ – Wagner Municipal Airport – Wagner, South Dakota
 * KAHC (AHC) – Amedee Army Airfield – Herlong, California
 * KAHH (AHH) – Amery Municipal Airport – Amery, Wisconsin
 * KAHN (AHN) – Athens Ben Epps Airport – Athens, Georgia
 * KAHQ – Wahoo Municipal Airport – Wahoo, Nebraska
 * KAIA (AIA) – Alliance Municipal Airport – Alliance, Nebraska
 * KAIB – Hopkins-Montrose County Airport – Nucla, Colorado
 * KAID (AID) – Anderson Municipal Airport (Darlington Field) – Anderson, Indiana
 * KAIG – Langlade County Airport – Antigo, Wisconsin
 * KAIK (AIK) – Aiken Regional Airport – Aiken, South Carolina
 * KAIO (AIO) – Atlantic Municipal Airport – Atlantic, Iowa
 * KAIT – Aitkin Municipal Airport (Steve Kurtz Field) – Aitkin, Minnesota
 * KAIV (AIV) – George Downer Airport – Aliceville, Alabama
 * KAIY (AIY) – Atlantic City Municipal Airport (Bader Field) – Atlantic City, New Jersey (closed 2006)
 * KAIZ (AIZ) – Lee C. Fine Memorial Airport – Lake Ozark, Missouri
 * KAJG – Mount Carmel Municipal Airport – Mount Carmel, Illinois
 * KAJO – Corona Municipal Airport – Corona, California
 * KAJR – Habersham County Airport – Cornelia, Georgia
 * KAJZ – Blake Field – Delta, Colorado
 * KAKH – Gastonia Municipal Airport – Gastonia, North Carolina
 * KAKO (AKO) – Colorado Plains Regional Airport – Akron, Colorado
 * KAKQ – Wakefield Municipal Airport – Wakefield, Virginia
 * KAKR (AKC) – Akron Fulton Executive Airport – Akron, Ohio
 * KALB (ALB) – Albany International Airport – Albany, New York
 * KALI (ALI) – Alice International Airport – Alice, Texas
 * KALK - Airstrip west of Libby AAF See KFHU
 * KALM (ALM) – Alamogordo–White Sands Regional Airport – Alamogordo, New Mexico
 * KALN (ALN) – St. Louis Regional Airport – Alton, Illinois
 * KALO (ALO) – Waterloo Regional Airport – Waterloo, Iowa
 * KALS (ALS) – San Luis Valley Regional Airport – Alamosa, Colorado
 * KALW (ALW) – Walla Walla Regional Airport – Walla Walla, Washington
 * KALX (ALX) – Thomas C. Russell Field – Alexander City, Alabama
 * KAMA (AMA) – Rick Husband Amarillo International Airport – Amarillo, Texas
 * KAMG – Bacon County Airport – Alma, Georgia
 * KAMN (AMN) – Gratiot Community Airport – Alma, Michigan
 * KAMT – Alexander Salamon Airport – West Union, Ohio
 * KAMW (AMW) – Ames Municipal Airport – Ames, Iowa
 * KANB (ANB) – Anniston Regional Airport – Anniston, Alabama
 * KAND (AND) – Anderson Regional Airport – Anderson, South Carolina
 * KANE – Anoka County–Blaine Airport (Janes Field) – Minneapolis
 * KANJ – Sault Ste. Marie Municipal Airport (Sanderson Field) – Sault Ste. Marie, Michigan
 * KANK – Harriet Alexander Field – Salida, Colorado
 * KANP (ANP) – Lee Airport – Annapolis, Maryland
 * KANQ (ANQ) – Tri-State Steuben County Airport – Angola, Indiana
 * KANW (ANW) – Ainsworth Regional Airport – Ainsworth, Nebraska
 * KANY (ANY) – Anthony Municipal Airport – Anthony, Kansas
 * KAOC – Arco Butte County Airport – Arco, Idaho
 * KAOH (AOH) – Lima Allen County Airport – Lima, Ohio
 * KAOO (AOO) – Altoona–Blair County Airport – Altoona, Pennsylvania
 * KAOV – Ava Bill Martin Memorial Airport – Ava, Missouri
 * KAPA (APA) – Centennial Airport – Centennial, Colorado
 * KAPC (APC) – Napa County Airport (Napa Valley Airport) – Napa, California
 * KAPF (APF) – Naples Airport – Naples, Florida
 * KAPG (APG) – Phillips Army Airfield – Aberdeen Proving Ground, Maryland
 * KAPH (APH) – A.P. Hill Army Airfield – Fort Walker, Virginia
 * KAPN (APN) – Alpena County Regional Airport – Alpena, Michigan
 * KAPT (APT) – Marion County Airport (Brown Field) – Jasper, Tennessee
 * KAPV (APV) – Apple Valley Airport – Apple Valley, California
 * KAQO – Llano Municipal Airport – Llano, Texas
 * KAQP – Appleton Municipal Airport – Appleton, Minnesota
 * KAQR – Atoka Municipal Airport – Atoka, Oklahoma
 * KAQW – Harriman-and-West Airport – North Adams, Massachusetts
 * KARA (ARA) – Acadiana Regional Airport – New Iberia, Louisiana
 * KARB (ARB) – Ann Arbor Municipal Airport – Ann Arbor, Michigan
 * KARG (ARG) – Walnut Ridge Regional Airport – Walnut Ridge, Arkansas
 * KARM (WHT) – Wharton Regional Airport – Wharton, Texas
 * KARR (AUZ) – Aurora Municipal Airport (Chicago/Aurora Municipal Airport) – Aurora, Illinois
 * KART (ART) – Watertown International Airport – Watertown, New York
 * KARV (ARV) – Lakeland Airport (Noble F. Lee Memorial Field) – Minocqua / Woodruff, Wisconsin
 * KARW (BFT) – Beaufort County Airport (Frogmore Island Airport) – Beaufort County, South Carolina
 * KASD – Slidell Airport – Slidell, Louisiana
 * KASE (ASE) – Aspen–Pitkin County Airport – Aspen, Colorado
 * KASG (SPZ) – Springdale Municipal Airport – Springdale, Arkansas
 * KASH (ASH) – Nashua Airport (Boire Field) – Nashua, New Hampshire
 * KASJ – Tri-County Airport – Ahoskie, North Carolina
 * KASL (ASL) – Harrison County Airport – Marshall, Texas
 * KASN (ASN) – Talladega Municipal Airport – Talladega, Alabama
 * KAST (AST) – Astoria Regional Airport – Astoria, Oregon
 * KASW – Warsaw Municipal Airport – Warsaw, Indiana
 * KASX (ASX) – John F. Kennedy Memorial Airport – Ashland, Wisconsin
 * KASY (ASY) – Ashley Municipal Airport – Ashley, North Dakota
 * KATA – Hall–Miller Municipal Airport – Atlanta, Texas
 * KATL (ATL) – Hartsfield–Jackson Atlanta International Airport – Atlanta
 * KATS (ATS) – Artesia Municipal Airport – Artesia, New Mexico
 * KATW (ATW) – Appleton International Airport – Greenville, Wisconsin (near Appleton)
 * KATY (ATY) – Watertown Regional Airport – Watertown, South Dakota
 * KAUG (AUG) – Augusta State Airport – Augusta, Maine
 * KAUH – Aurora Municipal Airport (Al Potter Field) – Aurora, Nebraska
 * KAUM (AUM) – Austin Municipal Airport – Austin, Minnesota
 * KAUN (AUN) – Auburn Municipal Airport – Auburn, California
 * KAUO (AUO) – Auburn University Regional Airport (Robert G. Pitts Field) – Auburn, Alabama
 * KAUS (AUS) – Austin–Bergstrom International Airport – Austin, Texas
 * KAUW (AUW) – Wausau Downtown Airport – Wausau, Wisconsin
 * KAVC – Mecklenburg-Brunswick Regional Airport – South Hill, Virginia
 * KAVK – Alva Regional Airport – Alva, Oklahoma
 * KAVL (AVL) – Asheville Regional Airport – Fletcher, North Carolina
 * KAVO (AVO) – Avon Park Executive Airport – Avon Park, Florida
 * KAVP (AVP) – Wilkes-Barre/Scranton International Airport – Avoca, Pennsylvania
 * KAVQ (AVW) – Marana Regional Airport (Avra Valley Airport) – Marana, Arizona
 * KAVX (AVX) – Catalina Airport (Airport in the Sky) – Avalon / Santa Catalina Island, California
 * KAWG – Washington Municipal Airport – Washington, Iowa
 * KAWM (AWM) – West Memphis Municipal Airport – West Memphis, Arkansas
 * KAWO – Arlington Municipal Airport – Arlington, Washington
 * KAXA (AXG) – Algona Municipal Airport – Algona, Iowa
 * KAXH – Houston Southwest Airport – Arcola, Texas
 * KAXN (AXN) – Alexandria Municipal Airport (Chandler Field) – Alexandria, Minnesota
 * KAXQ – Clarion County Airport – Clarion, Pennsylvania
 * KAXS (AXS) – Altus/Quartz Mountain Regional Airport – Altus, Oklahoma
 * KAXV (AXV) – Neil Armstrong Airport (Auglaize County Airport) – Wapakoneta, Ohio
 * KAXX (AXX) – Angel Fire Airport – Angel Fire, New Mexico
 * KAYS (AYS) – Waycross–Ware County Airport – Waycross, Georgia
 * KAYX – Arnold Air Force Base – Tullahoma, Tennessee
 * KAZC – Colorado City Municipal Airport – Colorado City, Arizona
 * KAZE – Hazlehurst Airport – Hazlehurst, Georgia
 * KAZO (AZO) – Kalamazoo/Battle Creek International Airport – Kalamazoo / Battle Creek, Michigan
 * KAZU – Arrowhead Assault Strip – Fort Chaffee, Arkansas

KB

 * KBAB (BAB) – Beale Air Force Base – Marysville, California
 * KBAC - Barnes County Municipal Airport - Valley City, North Dakota
 * KBAD (BAD) – Barksdale Air Force Base – Bossier City, Louisiana
 * KBAF (BAF) – Westfield-Barnes Regional Airport – Westfield / Springfield, Massachusetts
 * KBAK (CLU) – Columbus Municipal Airport – Columbus, Indiana
 * KBAM (BAM) – Battle Mountain Airport (Lander County Airport) – Battle Mountain, Nevada
 * KBAN - Bryant Field - Bridgeport, California
 * KBAX – Huron County Memorial Airport – Bad Axe, Michigan
 * KBAZ – New Braunfels Regional Airport – New Braunfels, Texas
 * KBBB (BBB) – Benson Municipal Airport – Benson, Minnesota
 * KBBD – Curtis Field – Brady, Texas
 * KBBG (BKG) – Branson Airport – Branson, Missouri
 * KBBP (BTN) – Marlboro County Jetport (H.E. Avent Field) – Bennettsville, South Carolina
 * KBBW (BBW) – Broken Bow Municipal Airport (Keith Glaze Field) – Broken Bow, Nebraska
 * KBCB (BCB) – VirginiaTech/Montgomery Executive Airport – Blacksburg, Virginia
 * KBCE (BCE) – Bryce Canyon Airport – Bryce Canyon, Utah
 * KBCK – Black River Falls Area Airport – Black River Falls, Wisconsin
 * KBCT (BCT) – Boca Raton Airport – Boca Raton, Florida
 * KBDE (BDE) – Baudette International Airport – Baudette, Minnesota
 * KBDG (BDG) – Blanding Municipal Airport – Blanding, Utah
 * KBDH (ILL) – Willmar Municipal Airport (John L. Rice Field) – Willmar, Minnesota
 * KBDJ – Boulder Junction Airport – Boulder Junction, Wisconsin
 * KBDL (BDL) – Bradley International Airport – Windsor Locks / Hartford, Connecticut
 * KBDN - Bend Municipal Airport - Bend, Oregon
 * KBDQ – Morrilton Municipal Airport – Morrilton, Arkansas
 * KBDR (BDR) – Igor I. Sikorsky Memorial Airport – Bridgeport, Connecticut
 * KBDU – Boulder Municipal Airport – Boulder, Colorado


 * KBEC (BEC) – Beech Factory Airport – Wichita, Kansas
 * KBED (BED) – Laurence G. Hanscom Field – Bedford, Massachusetts
 * KBEH (BEH) – Southwest Michigan Regional Airport – Benton Harbor, Michigan
 * KBFA – Boyne Mountain Airport – Boyne Falls, Michigan
 * KBFD (BFD) – Bradford Regional Airport – Bradford, Pennsylvania
 * KBFE – Terry County Airport – Brownfield, Texas
 * KBFF (BFF) – Western Nebraska Regional Airport (William B. Heilig Field) – Scottsbluff, Nebraska
 * KBFI (BFI) – Boeing Field/King County International Airport – Seattle, Washington
 * KBFK – Buffalo Municipal Airport – Buffalo, Oklahoma
 * KBFL (BFL) – Meadows Field Airport – Bakersfield, California
 * KBFM (BFM) – Mobile Downtown Airport – Mobile, Alabama
 * KBFR (BFR) – Virgil I. Grissom Municipal Airport – Bedford, Indiana
 * KBFW – Silver Bay Municipal Airport – Silver Bay, Minnesota
 * KBGD – Hutchinson County Airport – Borger, Texas
 * KBGE (BGE) – Decatur County Industrial Air Park – Bainbridge, Georgia
 * KBGF – Winchester Municipal Airport – Winchester, Tennessee
 * KBGM (BGM) – Greater Binghamton Airport – Binghamton, New York
 * KBGR (BGR) – Bangor International Airport – Bangor, Maine
 * KBHB (BHB) – Hancock County-Bar Harbor Airport – Bar Harbor, Maine
 * KBHC – Baxley Municipal Airport – Baxley, Georgia
 * KBHK – Baker Municipal Airport – Baker, Montana
 * KBHM (BHM) – Birmingham-Shuttlesworth International Airport – Birmingham, Alabama
 * KBID (BID) – Block Island State Airport – Block Island, Rhode Island
 * KBIE – Beatrice Municipal Airport – Beatrice, Nebraska
 * KBIF (BIF) – Biggs Army Airfield – Fort Bliss, El Paso, Texas
 * KBIH (BIH) – Eastern Sierra Regional Airport – Bishop, California
 * KBIL (BIL) – Billings Logan International Airport – Billings, Montana
 * KBIS (BIS) – Bismarck Municipal Airport – Bismarck, North Dakota
 * KBIV (BIV) – West Michigan Regional Airport – Holland, Michigan
 * KBIX (BIX) – Keesler Air Force Base – Biloxi, Mississippi
 * KBJC (BJC) – Rocky Mountain Metropolitan Airport – Denver, Colorado
 * KBJI (BJI) – Bemidji Regional Airport – Bemidji, Minnesota
 * KBJJ (BJJ) – Wayne County Airport – Wooster, Ohio
 * KBJN - Tonopah Test Range Airport - Tonopah, Nevada
 * KBKD – Stephens County Airport – Breckenridge, Texas
 * KBKE (BKE) – Baker City Municipal Airport – Baker City, Oregon
 * KBKF – Buckley Space Force Base – Aurora, Colorado
 * KBKL (BKL) – Cleveland Burke Lakefront Airport – Cleveland, Ohio
 * KBKN - Blackwell-Tonkawa Municipal Airport - Blackwell, Oklahoma
 * KBKS – Brooks County Airport – Falfurrias, Texas
 * KBKT (BKT) – Allen C. Perkinson Airport / Blackstone Army Airfield – Blackstone, Virginia
 * KBKV – Brooksville-Tampa Bay Regional Airport – Brooksville, Florida
 * KBKW (BKW) – Raleigh County Memorial Airport – Beckley, West Virginia
 * KBKX (BKX) – Brookings Municipal Airport – Brookings, South Dakota
 * KBLF (BLF) – Mercer County Airport – Bluefield, West Virginia
 * KBLH (BLH) – Blythe Airport – Blythe, California
 * KBLI (BLI) – Bellingham International Airport – Bellingham, Washington
 * KBLM (BLM) – Monmouth Executive Airport – Belmar / Farmingdale, New Jersey
 * KBLU – Blue Canyon-Nyack Airport – Emigrant Gap, California
 * KBLV (BLV) – MidAmerica St. Louis Airport / Scott Air Force Base – Belleville, Illinois
 * KBMC (BMC) – Brigham City Airport – Brigham City, Utah
 * KBMG (BMG) – Monroe County Airport – Bloomington, Indiana
 * KBMI (BMI) – Central Illinois Regional Airport – Bloomington, Illinois
 * KBML (BML) – Berlin Regional Airport – Berlin, New Hampshire
 * KBMQ – Burnet Municipal Airport (Kate Craddock Field) – Burnet, Texas
 * KBMT (BMT) – Beaumont Municipal Airport – Beaumont, Texas
 * KBNA (BNA) – Nashville International Airport – Nashville, Tennessee
 * KBNG (BNG) – Banning Municipal Airport – Banning, California
 * KBNL – Barnwell Regional Airport – Barnwell, South Carolina
 * KBNO (BNO) – Burns Municipal Airport – Burns, Oregon
 * KBNW – Boone Municipal Airport – Boone, Iowa
 * KBOI (BOI) – Boise Air Terminal (Gowen Field) – Boise, Idaho
 * KBOK – Brookings Airport – Brookings, Oregon
 * KBOS (BOS) – Logan International Airport – Boston, Massachusetts
 * KBOW (BOW) – Bartow Executive Airport – Bartow, Florida
 * KBPG – Big Spring McMahon-Wrinkle Airport – Big Spring, Texas
 * KBPI (BPI) – Miley Memorial Field – Big Piney, Wyoming
 * KBPK (WMH) – Ozark Regional Airport (formerly Baxter County Regional Airport) – Mountain Home, Arkansas
 * KBPP (BWM) – Bowman Municipal Airport – Bowman, North Dakota
 * KBPT (BPT) – Jack Brooks Regional Airport – Nederland, Texas (near Beaumont & Port Arthur)
 * KBQK (BQK) – Brunswick Golden Isles Airport – Brunswick, Georgia
 * KBQR (BQR) – Buffalo-Lancaster Regional Airport – Lancaster, New York
 * KBRD (BRD) – Brainerd Lakes Regional Airport – Brainerd, Minnesota
 * KBRL (BRL) – Southeast Iowa Regional Airport – Burlington, Iowa
 * KBRO (BRO) – Brownsville/South Padre Island International Airport – Brownsville, Texas
 * KBRY – Samuels Field – Bardstown, Kentucky
 * KBST – Belfast Municipal Airport – Belfast, Maine
 * KBTA - Blair Municipal Airport - Blair, Nebraska
 * KBTF (BTF) – Skypark Airport – Bountiful, Utah
 * KBTL (BTL) – W. K. Kellogg Airport – Battle Creek, Michigan
 * KBTM (BTM) – Bert Mooney Airport – Butte, Montana
 * KBTN – Britton Municipal Airport – Britton, South Dakota
 * KBTP (BTP) – Pittsburgh-Butler Regional Airport (K.W. Scholter Field) – Butler, Pennsylvania
 * KBTR (BTR) – Baton Rouge Metropolitan Airport – Baton Rouge, Louisiana
 * KBTV (BTV) – Burlington International Airport – Burlington, Vermont
 * KBTY (BTY) – Beatty Airport – Beatty, Nevada
 * KBUB – Cram Field – Burwell, Nebraska
 * KBUF (BUF) – Buffalo Niagara International Airport – Buffalo, New York
 * KBUM – Butler Memorial Airport – Butler, Missouri
 * KBUR (BUR) – Hollywood Burbank Airport (Bob Hope Airport) – Burbank, California
 * KBUU – Burlington Municipal Airport – Burlington, Wisconsin
 * KBUY – Burlington-Alamance Regional Airport – Burlington, North Carolina
 * KBVI (BFP) – Beaver County Airport – Beaver Falls, Pennsylvania
 * KBVN – Albion Municipal Airport – Albion, Nebraska
 * KBVO (BVO) – Bartlesville Municipal Airport – Bartlesville, Oklahoma
 * KBVS (MVW) – Skagit Regional Airport – Burlington & Mount Vernon, Washington
 * KBVU - Boulder City Municipal Airport - Boulder City, Nevada
 * KBVX (BVX) – Batesville Regional Airport – Batesville, Arkansas
 * KBVY (BVY) – Beverly Regional Airport – Beverly, Massachusetts
 * KBWC (BWC) – Brawley Municipal Airport – Brawley, California
 * KBWD (BWD) – Brownwood Regional Airport – Brownwood, Texas
 * KBWG (BWG) – Bowling Green-Warren County Regional Airport – Bowling Green, Kentucky
 * KBWI (BWI) – Baltimore-Washington International Thurgood Marshall Airport – Baltimore, Maryland & Washington, D.C.
 * KBWP – Harry Stern Airport – Wahpeton, North Dakota
 * KBXA (BXA) – George R. Carr Memorial Airfield – Bogalusa, Louisiana
 * KBXG – Burke County Airport – Waynesboro, Georgia
 * KBXK (BXK) – Buckeye Municipal Airport – Buckeye, Arizona
 * KBXM (NHZ) – Brunswick Executive Airport (formerly NAS Brunswick) – Brunswick, Maine
 * KBYG (BYG) – Johnson County Airport – Buffalo, Wyoming
 * KBYH (BYH) – Arkansas International Airport – Blytheville, Arkansas
 * KBYI (BYI) – Burley Municipal Airport – Burley, Idaho
 * KBYS – Bicycle Lake Army Airfield (Fort Irwin) – Barstow, California
 * KBYY (BBC) – Bay City Municipal Airport – Bay City, Texas
 * KBZN (BZN) – Bozeman Yellowstone International Airport (Gallatin Field) – Bozeman, Montana

KC

 * KCAD (CAD) – Wexford County Airport – Cadillac, Michigan
 * KCAE (CAE) – Columbia Metropolitan Airport – West Columbia, South Carolina (near Columbia)
 * KCAG (CIG) – Craig-Moffat Airport – Craig, Colorado
 * KCAK (CAK) – Akron-Canton Regional Airport – Akron, Ohio (near Canton)
 * KCAO (CAO) – Clayton Municipal Airpark – Clayton, New Mexico
 * KCAR (CAR) – Caribou Municipal Airport – Caribou, Maine
 * KCAV – Clarion Municipal Airport – Clarion, Iowa
 * KCBE (CBE) – Greater Cumberland Regional Airport – Cumberland, Maryland
 * KCBF (CBF) – Council Bluffs Municipal Airport – Council Bluffs, Iowa
 * KCBG – Cambridge Municipal Airport – Cambridge, Minnesota
 * KCBK (CBK) – Colby Municipal Airport (Shalz Field) – Colby, Kansas
 * KCBM (CBM) – Columbus Air Force Base – Columbus, Mississippi
 * KCCA – Clinton Municipal Airport – Clinton, Arkansas
 * KCCB (CCB) – Cable Airport – Upland, California
 * KCCO – Newnan-Coweta County Airport – Newnan, Georgia
 * KCCR (CCR) – Buchanan Field Airport – Concord, California
 * KCCY (CCY) – Northeast Iowa Regional Airport – Charles City, Iowa
 * KCDA (LLX) – Caledonia County Airport – Lyndonville, Vermont
 * KCDC (CDC) – Cedar City Regional Airport – Cedar City, Utah
 * KCDD – Scotts Seaplane Base – Crane Lake, Minnesota
 * KCDH – Harrell Field (Camden Municipal/Regional Airport) – Camden, Arkansas
 * KCDI – Cambridge Municipal Airport – Cambridge, Ohio
 * KCDK (CDK) – George T. Lewis Airport – Cedar Key, Florida
 * KCDN (CDN) – Woodward Field (Kershaw County Airport) – Camden, South Carolina
 * KCDR (CDR) – Chadron Municipal Airport – Chadron, Nebraska
 * KCDS (CDS) – Childress Municipal Airport – Childress, Texas
 * KCDW (CDW) – Essex County Airport (Caldwell Airport) – Caldwell, New Jersey
 * KCEA (CEA) – Cessna Aircraft Field – Wichita, Kansas
 * KCEC (CEC) – Del Norte County Airport (Jack McNamara Field) – Crescent City, California
 * KCEF (CEF) – Westover Metropolitan Airport / Westover Air Reserve Base – Springfield / Chicopee, Massachusetts
 * KCEK – Crete Municipal Airport – Crete, Nebraska
 * KCEU (CEU) – Oconee County Regional Airport – Clemson, South Carolina
 * KCEV (CEV) – Mettel Field – Connersville, Indiana
 * KCEW (CEW) – Bob Sikes Airport – Crestview, Florida
 * KCEY (CEY) – Murray-Calloway County Airport (Kyle-Oakley Field) – Murray, Kentucky
 * KCEZ (CEZ) – Cortez Municipal Airport – Cortez, Colorado
 * KCFD (CFD) – Coulter Field – Bryan, Texas
 * KCFE – Buffalo Municipal Airport – Buffalo, Minnesota
 * KCFJ – Crawfordsville Municipal Airport – Crawfordsville, Indiana
 * KCFS – Tuscola Area Airport – Caro, Michigan
 * KCFT (CFT) – Greenlee County Airport – Clifton / Morenci, Arizona
 * KCFV (CFV) – Coffeyville Municipal Airport – Coffeyville, Kansas
 * KCGC – Crystal River Airport (Captain Tom Davis Field) – Crystal River, Florida
 * KCGE (CGE) – Cambridge-Dorchester Regional Airport – Cambridge, Maryland
 * KCGF (CGF) – Cuyahoga County Airport – Cleveland, Ohio
 * KCGI (CGI) – Cape Girardeau Regional Airport – Cape Girardeau, Missouri
 * KCGS (CGS) – College Park Airport – College Park, Maryland
 * KCGX - Meigs Field - Chicago, Illinois (closed 2003)
 * KCGZ (CGZ) – Casa Grande Municipal Airport – Casa Grande, Arizona
 * KCHA (CHA) – Chattanooga Metropolitan Airport – Chattanooga, Tennessee
 * KCHD – Chandler Municipal Airport – Chandler, Arizona
 * KCHK (CHK) – Chickasha Municipal Airport – Chickasha, Oklahoma
 * KCHN – Wauchula Municipal Airport – Wauchula, Florida
 * KCHO (CHO) – Charlottesville-Albemarle Airport – Charlottesville, Virginia
 * KCHQ – Mississippi County Airport – Charleston, Missouri
 * KCHS (CHS) – Charleston International Airport (Charleston Air Force Base) – Charleston, South Carolina
 * KCHT – Chillicothe Municipal Airport – Chillicothe, Missouri
 * KCHU – Houston County Airport – Caledonia, Minnesota
 * KCIC (CIC) – Chico Municipal Airport – Chico, California
 * KCID (CID) – The Eastern Iowa Airport – Cedar Rapids, Iowa
 * KCII – Choteau Airport – Choteau, Montana
 * KCIN (CIN) – Arthur N. Neu Airport – Carroll, Iowa
 * KCIR – Cairo Regional Airport – Cairo, Illinois
 * KCIU (CIU) – Chippewa County International Airport – Sault Ste Marie, Michigan
 * KCJJ – Ellen Church Field – Cresco, Iowa
 * KCJR – Culpeper Regional Airport – Culpeper, Virginia
 * KCKA (CKA) – Kegelman Air Force Auxiliary Field – Cherokee, Oklahoma
 * KCKB (CKB) – North Central West Virginia Airport – Clarksburg, West Virginia
 * KCKC (GRM) – Grand Marais/Cook County Airport – Grand Marais, Minnesota
 * KCKF (CKF) – Crisp County-Cordele Airport – Cordele, Georgia
 * KCKI – Williamsburg Regional Airport – Kingstree, South Carolina
 * KCKM – Fletcher Field – Clarksdale, Mississippi
 * KCKN (CKN) – Crookston Municipal Airport – Crookston, Minnesota
 * KCKP – Cherokee Municipal Airport – Cherokee, Iowa
 * KCKV (CKV) – Clarksville-Montgomery County Regional Airport (John F. Outlaw Field) – Clarksville, Tennessee
 * KCLE (CLE) – Cleveland Hopkins International Airport – Cleveland, Ohio
 * KCLI (CLI) – Clintonville Municipal Airport – Clintonville, Wisconsin
 * KCLK – Clinton Regional Airport – Clinton, Oklahoma
 * KCLL (CLL) – Easterwood Airport – College Station, Texas
 * KCLM (CLM) – William R. Fairchild International Airport – Port Angeles, Washington
 * KCLR (CLR) – Cliff Hatfield Memorial Airport – Calipatria, California
 * KCLS (CLS) – Chehalis-Centralia Airport – Chehalis, Washington
 * KCLT (CLT) – Charlotte/Douglas International Airport – Charlotte, North Carolina
 * KCLW (CLW) – Clearwater Air Park – Clearwater, Florida
 * KCMA – Camarillo Airport – Camarillo, California
 * KCMH (CMH) – John Glenn Columbus International Airport – Columbus, Ohio
 * KCMI (CMI) – University of Illinois Willard Airport – Savoy, Illinois (Champaign-Urbana area)
 * KCMR – H.A. Clark Memorial Field – Williams, Arizona
 * KCMX (CMX) – Houghton County Memorial Airport – Hancock, Michigan
 * KCMY (CMY) – Sparta/Fort McCoy Airport – Sparta, Wisconsin
 * KCNC – Chariton Municipal Airport – Chariton, Iowa
 * KCNH (CNH) – Claremont Municipal Airport – Claremont, New Hampshire
 * KCNI – Cherokee County Regional Airport – Canton, Georgia
 * KCNK (CNK) – Blosser Municipal Airport – Concordia, Kansas
 * KCNM (CNM) – Cavern City Air Terminal – Carlsbad, New Mexico
 * KCNO (CNO) – Chino Airport – Chino, California
 * KCNP – Billy G. Ray Field – Chappell, Nebraska
 * KCNU (CNU) – Chanute Martin Johnson Airport – Chanute, Kansas
 * KCNW (CNW) – TSTC Waco Airport – Waco, Texas
 * KCNY (CNY) – Canyonlands Regional Airport – Moab, Utah
 * KCOD (COD) – Yellowstone Regional Airport – Cody, Wyoming
 * KCOE (COE) – Coeur d'Alene Air Terminal – Coeur d'Alene, Idaho
 * KCOF (COF) – Patrick Space Force Base – Cocoa Beach, Florida
 * KCOI (COI) – Merritt Island Airport – Merritt Island, Florida
 * KCOM – Coleman Municipal Airport – Coleman, Texas
 * KCON (CON) – Concord Municipal Airport – Concord, New Hampshire
 * KCOQ – Cloquet Carlton County Airport – Cloquet, Minnesota
 * KCOS (COS) – Colorado Springs Airport (City of Colorado Springs Municipal Airport) – Colorado Springs, Colorado
 * KCOT (COT) – Cotulla-La Salle County Airport – Cotulla, Texas
 * KCOU (COU) – Columbia Regional Airport – Columbia, Missouri
 * KCPC – Columbus County Municipal Airport – Whiteville, North Carolina
 * KCPF – Wendell H. Ford Airport – Hazard, Kentucky
 * KCPK – Chesapeake Regional Airport – Norfolk, Virginia
 * KCPM (CPM) – Compton/Woodley Airport – Compton, California
 * KCPR (CPR) – Natrona County International Airport – Casper, Wyoming
 * KCPS (CPS) – St. Louis Downtown Airport – Cahokia, Illinois
 * KCPT – Cleburne Regional Airport – Cleburne, Texas
 * KCPU (CPU) – Calaveras County Airport (Maury Rasmussen Field) – San Andreas, California
 * KCQA – Lakefield Airport – Celina, Ohio
 * KCQB – Chandler Regional Airport – Chandler, Oklahoma
 * KCQC - Moriarty Municipal Airport - Moriarty, New Mexico
 * KCQF – H. L. Sonny Callahan Airport – Fairhope, Alabama
 * KCQM – Cook Municipal Airport – Cook, Minnesota
 * KCQW (HCW) – Cheraw Municipal Airport (Lynch Bellinger Field) – Cheraw, South Carolina
 * KCQX – Chatham Municipal Airport – Chatham, Massachusetts
 * KCRE (CRE) – Grand Strand Airport – North Myrtle Beach, South Carolina
 * KCRG (CRG) – Jacksonville Executive at Craig Airport – Jacksonville, Florida
 * KCRO (CRO) – Corcoran Airport – Corcoran, California
 * KCRP (CRP) – Corpus Christi International Airport – Corpus Christi, Texas
 * KCRQ (CLD) – McClellan-Palomar Airport – Carlsbad, California
 * KCRS – Corsicana Municipal Airport (C. David Campbell Field) – Corsicana, Texas
 * KCRT (CRT) – Z.M. Jack Stell Field – Crossett, Arkansas
 * KCRW (CRW) – Yeager Airport – Charleston, West Virginia
 * KCRX (CRX) – Roscoe Turner Airport – Corinth, Mississippi
 * KCRZ – Corning Municipal Airport – Corning, Iowa
 * KCSB – Cambridge Municipal Airport – Cambridge, Nebraska
 * KCSG (CSG) – Columbus Airport – Columbus, Georgia
 * KCSM (CSM) – Clinton-Sherman Industrial Airpark (Oklahoma Air & Space Port) – Clinton, Oklahoma
 * KCSQ (CSQ) – Creston Municipal Airport – Creston, Iowa
 * KCSV (CSV) – Crossville Memorial Airport (Whitson Field) – Crossville, Tennessee
 * KCTB (CTB) – Cut Bank Municipal Airport – Cut Bank, Montana
 * KCTJ – West Georgia Regional Airport (O.V. Gray Field) – Carrollton, Georgia
 * KCTK – Ingersoll Airport – Canton, Illinois
 * KCTY (CTY) – Cross City Airport – Cross City, Florida
 * KCTZ (CTZ) – Clinton-Sampson County Airport – Clinton, North Carolina
 * KCUB (CUB) – Columbia Owens Downtown Airport – Columbia, South Carolina
 * KCUH – Cushing Municipal Airport – Cushing, Oklahoma
 * KCUL – Carmi Municipal Airport – Carmi, Illinois
 * KCUT – Custer County Airport – Custer, South Dakota
 * KCVG (CVG) – Cincinnati/Northern Kentucky International Airport – Hebron, Kentucky (near Cincinnati, Ohio and Covington, Kentucky)
 * KCVH (HLI) – Hollister Municipal Airport – Hollister, California
 * KCVK – Sharp County Regional Airport – Ash Flat, Arkansas
 * KCVN (CVN) – Clovis Municipal Airport – Clovis, New Mexico
 * KCVO (CVO) – Corvallis Municipal Airport – Corvallis, Oregon
 * KCVS (CVS) – Cannon Air Force Base – Clovis, New Mexico
 * KCVX – Charlevoix Municipal Airport – Charlevoix, Michigan
 * KCWA (CWA) – Central Wisconsin Airport – Mosinee, Wisconsin
 * KCWC - Kickapoo Downtown Airpark - Wichita Falls, Texas
 * KCWF (CWF) – Chennault International Airport – Lake Charles, Louisiana
 * KCWI – Clinton Municipal Airport – Clinton, Iowa
 * KCWS – Dennis F. Cantrell Field – Conway, Arkansas (closed/replaced, see: KCXW)
 * KCWV – Claxton-Evans County Airport – Claxton, Georgia
 * KCXE – Chase City Municipal Airport – Chase City, Virginia
 * KCXL (CXL) – Calexico International Airport – Calexico, California
 * KCXO (CXO) – Lone Star Executive Airport – Houston, Texas
 * KCXP (CXP) – Carson City Airport – Carson City, Nevada
 * KCXU – Camilla-Mitchell County Airport – Camilla, Georgia
 * KCXW – Conway Municipal Airport (Cantrell Field) – Conway, Arkansas
 * KCXY (HAR) – Capital City Airport – Harrisburg, Pennsylvania
 * KCYO – Pickaway County Memorial Airport – Circleville, Ohio
 * KCYS (CYS) – Cheyenne Regional Airport (Jerry Olson Field) – Cheyenne, Wyoming
 * KCYW – Clay Center Municipal Airport – Clay Center, Kansas
 * KCZD – Cozad Municipal Airport – Cozad, Nebraska
 * KCZG (CZG) – Tri-Cities Airport – Endicott, New York
 * KCZK (CZK) – Cascade Locks State Airport – Cascade Locks, Oregon
 * KCZL – Tom B. David Field – Calhoun, Georgia
 * KCZT – Dimmit County Airport – Carrizo Springs, Texas

KD

 * KDAA (DAA) – Davison Army Airfield – Fort Belvoir, Virginia
 * KDAB (DAB) – Daytona Beach International Airport – Daytona Beach, Florida
 * KDAF – Necedah Airport – Necedah, Wisconsin
 * KDAG – Barstow-Daggett Airport – Daggett, California
 * KDAL (DAL) – Dallas Love Field – Dallas, Texas
 * KDAN (DAN) – Danville Regional Airport – Danville, Virginia
 * KDAW – Skyhaven Airport – Rochester, New Hampshire
 * KDAY (DAY) – James M. Cox International Airport – Dayton, Ohio
 * KDBN – W. H. 'Bud' Barron Airport – Dublin, Georgia
 * KDBQ (DBQ) – Dubuque Regional Airport – Dubuque, Iowa
 * KDCA (DCA) – Ronald Reagan Washington National Airport – Arlington County, Virginia (near Washington, D.C.)
 * KDCU – Pryor Field Regional Airport – Decatur, Alabama
 * KDCY – Daviess County Airport – Washington, Indiana
 * KDDC (DDC) – Dodge City Regional Airport – Dodge City, Kansas
 * KDDH – William H. Morse State Airport – Bennington, Vermont
 * KDEC (DEC) – Decatur Airport – Decatur, Illinois
 * KDED – DeLand Municipal Airport (Sidney H. Taylor Field) – DeLand, Florida
 * KDEH – Decorah Municipal Airport – Decorah, Iowa
 * KDEN (DEN) – Denver International Airport (replaced Stapleton Int'l) – Denver, Colorado
 * KDEQ (DEQ) – J. Lynn Helms Sevier County Airport – De Queen, Arkansas
 * KDET (DET) – Coleman A. Young International Airport – Detroit, Michigan
 * KDEW – Deer Park Airport – Deer Park, Washington
 * KDFI – Defiance Memorial Airport – Defiance, Ohio
 * KDFW (DFW) – Dallas/Fort Worth International Airport – Dallas / Fort Worth, Texas
 * KDGL (DGL) – Douglas Municipal Airport – Douglas, Arizona
 * KDGW (DGW) – Converse County Airport – Douglas, Wyoming
 * KDHN (DHN) – Dothan Regional Airport – Dothan, Alabama
 * KDHT – Dalhart Municipal Airport – Dalhart, Texas
 * KDIJ - Driggs-Reed Memorial Airport - Driggs, Idaho
 * KDIK (DIK) – Dickinson – Theodore Roosevelt Regional Airport – Dickinson, North Dakota
 * KDKB – DeKalb Taylor Municipal Airport – DeKalb, Illinois
 * KDKK – Chautauqua County/Dunkirk Airport – Dunkirk, New York
 * KDKR (DKR) – Houston County Airport – Crockett, Texas
 * KDKX – Knoxville Downtown Island Airport – Knoxville, Tennessee
 * KDLC – Dillon County Airport – Dillon, South Carolina
 * KDLF (DLF) – Laughlin Air Force Base – Del Rio, Texas
 * KDLH (DLH) – Duluth International Airport – Duluth, Minnesota
 * KDLL – Baraboo-Wisconsin Dells Airport – Baraboo, Wisconsin
 * KDLN – Dillon Airport – Dillon, Montana
 * KDLO – Delano Municipal Airport – Delano, California
 * KDLS (DLS) – Columbia Gorge Regional Airport (The Dalles Municipal Airport) – The Dalles, Oregon
 * KDLZ (DLZ) – Delaware Municipal Airport – Delaware, Ohio
 * KDMA (DMA) – Davis-Monthan Air Force Base – Tucson, Arizona
 * KDMN (DMN) – Deming Municipal Airport – Deming, New Mexico
 * KDMO (DMO) – Sedalia Regional Airport – Sedalia, Missouri
 * KDMW – Carroll County Regional Airport (Jack B. Poage Field) – Westminster, Maryland
 * KDNA –Doña Ana County International Jetport – Santa Teresa, New Mexico
 * KDNL – Daniel Field – Augusta, Georgia
 * KDNN – Dalton Municipal Airport – Dalton, Georgia
 * KDNS – Denison Municipal Airport – Denison, Iowa
 * KDNV (DNV) – Vermilion Regional Airport – Danville, Illinois
 * KDOV (DOV) – Dover Air Force Base – Dover, Delaware
 * KDPA – Dupage Airport – West Chicago, Illinois
 * KDPG – Michael Army Airfield – Dugway Proving Ground, Utah
 * KDPL – Duplin County Airport – Kenansville, North Carolina
 * KDQH – Douglas Municipal Airport – Douglas, Georgia
 * KDRA – Desert Rock Airport – Mercury, Nevada
 * KDRI (DRI) – Beauregard Regional Airport – De Ridder, Louisiana
 * KDRO – Durango-La Plata County Airport – Durango, Colorado
 * KDRT – Del Rio International Airport – Del Rio, Texas
 * KDRU – Drummond Airport – Drummond, Montana
 * KDSM (DSM) – Des Moines International Airport – Des Moines, Iowa
 * KDSV – Dansville Municipal Airport – Dansville, New York
 * KDTA – Delta Municipal Airport – Delta, Utah
 * KDTG – Dwight Airport – Dwight, Illinois
 * KDTL (DTL) – Detroit Lakes Airport (Wething Field) – Detroit Lakes, Minnesota
 * KDTN (DTN) – Shreveport Downtown Airport – Shreveport, Louisiana
 * KDTO – Denton Enterprise Airport – Denton, Texas
 * KDTS – Destin Executive Airport – Destin, Florida
 * KDTW (DTW) – Detroit Metropolitan Wayne County Airport – Romulus, Michigan (near Detroit)
 * KDUA (DUA) – Durant Regional Airport-Eaker Field – Durant, Oklahoma
 * KDUC – Halliburton Field (Duncan Municipal Airport) – Duncan, Oklahoma
 * KDUG – Bisbee-Douglas International Airport – Bisbee / Douglas, Arizona
 * KDUH – Toledo Suburban Airport – Lambertville, Michigan
 * KDUJ (DUJ) – DuBois Regional Airport (formerly DuBois-Jefferson County Airport) – DuBois, Pennsylvania
 * KDUX (DUX) – Moore County Airport – Dumas, Texas
 * KDVK – Stuart Powell Field – Danville, Kentucky
 * KDVL (DVL) – Devils Lake Regional Airport (Devils Lake Municipal Airport) – Devils Lake, North Dakota
 * KDVN – Davenport Municipal Airport – Davenport, Iowa
 * KDVO – Gnoss Field (Marin County Airport) – Novato, California
 * KDVP – Slayton Municipal Airport – Slayton, Minnesota
 * KDVT – Phoenix Deer Valley Airport – Phoenix, Arizona
 * KDWH – David Wayne Hooks Memorial Airport – Spring, Texas
 * KDWU – Ashland Regional Airport – Ashland, Kentucky
 * KDXE – Dexter Municipal Airport – Dexter, Missouri
 * KDXR – Danbury Municipal Airport – Danbury, Connecticut
 * KDXX – Lac qui Parle County Airport – Madison, Minnesota
 * KDYA (DYA) – Demopolis Municipal Airport (Julian D. "Buzz" Sawyer Airport) – Demopolis, Alabama
 * KDYB (DYB) – Summerville Airport – Summerville, South Carolina
 * KDYL – Doylestown Airport – Doylestown, Pennsylvania
 * KDYR – Dyersburg Regional Airport – Dyersburg, Tennessee
 * KDYS (DYS) – Dyess Air Force Base – Abilene, Texas
 * KDYT – Sky Harbor Airport & Seaplane Base – Duluth, Minnesota
 * KDZJ (DZJ) – Blairsville Airport – Blairsville, Georgia

KE

 * KEAG – Eagle Grove Municipal Airport – Eagle Grove, Iowa
 * KEAN (EAN) – Phifer Airfield – Wheatland, Wyoming
 * KEAR (EAR) – Kearney Regional Airport – Kearney, Nebraska
 * KEAT – Pangborn Memorial Airport – Wenatchee, Washington
 * KEAU (EAU) – Chippewa Valley Regional Airport – Eau Claire, Wisconsin
 * KEBG (EBG) – South Texas International Airport at Edinburg (Edinburg International Airport) – Edinburg, Texas
 * KEBS – Webster City Municipal Airport – Webster City, Iowa
 * KECG (ECG) – Elizabeth City Regional Airport / Elizabeth City CGAS (Elizabeth City-Pasquotank County Regional Airport) – Elizabeth City, North Carolina
 * KECP (ECP) – Northwest Florida Beaches International Airport – Panama City, Florida
 * KECS (ECS) – Mondell Field – Newcastle, Wyoming
 * KECU – Edwards County Airport – Rocksprings, Texas
 * KEDC – Austin Executive Airport (Bird's Nest Airport) – Austin, Texas
 * KEDE (EDE) – Northeastern Regional Airport – Edenton, North Carolina
 * KEDG – Weide Army Heliport – Edgewood Arsenal, Aberdeen Proving Ground, Maryland
 * KEDJ (EDJ) – Bellefontaine Regional Airport – Bellefontaine, Ohio
 * KEDN – Enterprise Municipal Airport – Enterprise, Alabama
 * KEDU - University Airport - Davis, California
 * KEDW (EDW) – Edwards Air Force Base – Rosamond, California
 * KEED – Needles Airport – Needles, California
 * KEEN (EEN) – Dillant-Hopkins Airport – Keene, New Hampshire
 * KEEO – Meeker Airport – Meeker, Colorado
 * KEET – Shelby County Airport – Alabaster, Alabama
 * KEFC – Belle Fourche Municipal Airport – Belle Fourche, South Dakota
 * KEFD – Ellington Field Joint Reserve Base – Houston, Texas
 * KEFK – Northeast Kingdom International Airport – Newport, Vermont
 * KEFT – Monroe Municipal Airport – Monroe, Wisconsin
 * KEFW – Jefferson Municipal Airport – Jefferson, Iowa
 * KEGE (EGE) – Eagle County Regional Airport – Eagle, Colorado (near Vail)
 * KEGI – Duke Field (Eglin Auxiliary Field 3) – Crestview, Florida
 * KEGQ – Emmetsburg Municipal Airport – Emmetsburg, Iowa
 * KEGT – Wellington Municipal Airport – Wellington, Kansas
 * KEGV – Eagle River Union Airport – Eagle River, Wisconsin
 * KEHA – Elkhart-Morton County Airport – Elkhart, Kansas
 * KEHO (EHO) – Shelby-Cleveland County Regional Airport – Shelby, North Carolina
 * KEHR – Henderson City-County Airport – Henderson, Kentucky
 * KEIK – Erie Municipal Airport – Erie, Colorado
 * KEIW – County Memorial Airport – New Madrid, Missouri
 * KEKA (EKA) – Murray Field – Eureka, California
 * KEKM – Elkhart Municipal Airport – Elkhart, Indiana
 * KEKN (EKN) – Elkins-Randolph County Airport (Jennings Randolph Field) – Elkins, West Virginia
 * KEKO (EKO) – Elko Regional Airport – Elko, Nevada
 * KEKQ – Wayne County Airport – Monticello, Kentucky
 * KEKS (EKS) – Ennis - Big Sky Airport – Ennis, Montana,
 * KEKX – Elizabethtown Regional Airport (Addington Field) – Elizabethtown, Kentucky
 * KEKY – Bessemer Airport – Bessemer, Alabama
 * KELA – Eagle Lake Airport – Eagle Lake, Texas
 * KELD (ELD) – South Arkansas Regional Airport at Goodwin Field – El Dorado, Arkansas
 * KELK (ELK) – Elk City Regional Business Airport – Elk City, Oklahoma
 * KELM (ELM) – Elmira/Corning Regional Airport – Big Flats, New York (near Elmira & Corning)
 * KELN – Bowers Field – Ellensburg, Washington
 * KELO (ELO) – Ely Municipal Airport – Ely, Minnesota
 * KELP (ELP) – El Paso International Airport – El Paso, Texas
 * KELY – Ely Airport (Yelland Field) – Ely, Nevada
 * KELZ – Wellsville Municipal Airport (Tarantine Field) – Wellsville, New York
 * KEMM (EMM) – Kemmerer Municipal Airport – Kemmerer, Wyoming
 * KEMP – Emporia Municipal Airport – Emporia, Kansas
 * KEMT – San Gabriel Valley Airport – El Monte, California
 * KEMV – Emporia-Greensville Regional Airport – Emporia, Virginia
 * KEND (END) – Vance Air Force Base – Enid, Oklahoma
 * KENL – Centralia Municipal Airport – Centralia, Illinois
 * KENV – Wendover Airport – Wendover, Utah
 * KENW (ENW) – Kenosha Regional Airport – Kenosha, Wisconsin
 * KEOE – Newberry County Airport – Newberry, South Carolina
 * KEOK – Keokuk Municipal Airport – Keokuk, Iowa
 * KEOP – Pike County Airport – Waverly, Ohio
 * KEOS – Neosho Hugh Robinson Airport – Neosho, Missouri
 * KEPG – Browns Airport – Weeping Water, Nebraska
 * KEPH – Ephrata Municipal Airport – Ephrata, Washington
 * KEPM – Eastport Municipal Airport – Eastport, Maine
 * KEQA – El_Dorado/Captain Jack Thomas Memorial Airport – El Dorado, Kansas
 * KEQY (EQY) – Monroe Regional Airport – Monroe, North Carolina
 * KERI (ERI) – Erie International Airport (Tom Ridge Field) – Erie, Pennsylvania
 * KERR – Errol Airport – Errol, New Hampshire
 * KERV – Kerrville Municipal Airport (Louis Schreiner Field) – Kerrville, Texas
 * KERY (ERY) – Luce County Airport – Newberry, Michigan
 * KESC – Delta County Airport – Escanaba, Michigan
 * KESF (ESF) – Esler Regional Airport – Alexandria, Louisiana
 * KESN (ESN) – Easton Airport (Newnan Field) – Easton, Maryland
 * KEST – Estherville Municipal Airport – Estherville, Iowa
 * KESW – Easton State Airport – Easton, Washington
 * KETB – West Bend Municipal Airport – West Bend, Wisconsin
 * KETC – Tarboro-Edgecombe Airport – Tarboro, North Carolina
 * KETN – Eastland Municipal Airport – Eastland, Texas
 * KEUF (EUF) – Weedon Field – Eufaula, Alabama
 * KEUG (EUG) – Eugene Airport / Mahlon Sweet Field – Eugene, Oregon
 * KEUL – Caldwell Industrial Airport – Caldwell, Idaho
 * KEVB – New Smyrna Beach Municipal Airport (Jack Bolt Field) – New Smyrna Beach, Florida
 * KEVM – Eveleth-Virginia Municipal Airport – Eveleth, Minnesota
 * KEVU (EVU) – Northwest Missouri Regional Airport – Maryville, Missouri
 * KEVV (EVV) – Evansville Regional Airport – Evansville, Indiana
 * KEVW (EVW) – Evanston-Uinta County Airport (Burns Field) – Evanston, Wyoming
 * KEVY – Summit Airport – Middletown, Delaware
 * KEWB (EWB) – New Bedford Regional Airport – New Bedford, Massachusetts
 * KEWK – Newton City/County Airport – Newton, Kansas
 * KEWN (EWN) – Coastal Carolina Regional Airport – New Bern, North Carolina
 * KEWR (EWR) – Newark Liberty International Airport – Newark & Elizabeth, New Jersey
 * KEXX (EXX) – Davidson County Airport – Lexington, North Carolina
 * KEYE (EYE) – Eagle Creek Airpark – Indianapolis, Indiana
 * KEYF – Curtis L. Brown Jr. Field – Elizabethtown, North Carolina
 * KEYQ – Weiser Air Park – Houston, Texas
 * KEYW (EYW) – Key West International Airport – Key West, Florida
 * KEZF – Shannon Airport – Fredericksburg, Virginia
 * KEZI – Kewanee Municipal Airport – Kewanee, Illinois
 * KEZM – Heart of Georgia Regional Airport – Eastman, Georgia
 * KEZS (EZS) – Shawano Municipal Airport – Shawano, Wisconsin
 * KEZZ – Cameron Memorial Airport – Cameron, Missouri

KF

 * KFAF – Joint Base Langley-Eustis (formerly Felker Army Airfield) – Fort Eustis, Virginia
 * KFAM – Farmington Regional Airport – Farmington, Missouri
 * KFAR (FAR) – Hector International Airport – Fargo, North Dakota
 * KFAT (FAT) – Fresno Yosemite International Airport – Fresno, California
 * KFAY (FAY) – Fayetteville Regional Airport (Grannis Field) – Fayetteville, North Carolina
 * KFBG (FBG) – Simmons Army Airfield – Fort Liberty, North Carolina
 * KFBL – Faribault Municipal Airport – Faribault, Minnesota
 * KFBR (FBR) – Fort Bridger Airport – Fort Bridger, Wyoming
 * KFBY – Fairbury Municipal Airport – Fairbury, Nebraska
 * KFCA/KGPI (FCA) – Glacier Park International Airport – Kalispell, Montana
 * KFCH – Fresno Chandler Executive Airport – Fresno, California
 * KFCI – Chesterfield County Airport – Richmond, Virginia
 * KFCM – Flying Cloud Airport – Eden Prairie, Minnesota
 * KFCS – Butts Army Airfield (Fort Carson) – Fort Carson, Colorado
 * KFCT – Vagabond Army Heliport – Yakima, Washington
 * KFCY – Forrest City Municipal Airport – Forrest City, Arkansas
 * KFDK – Frederick Municipal Airport – Frederick, Maryland
 * KFDR (FDR) – Frederick Regional Airport – Frederick, Oklahoma
 * KFDW – Fairfield County Airport – Winnsboro, South Carolina
 * KFDY – Findlay Airport – Findlay, Ohio
 * KFEP – Albertus Airport – Freeport, Illinois
 * KFES – Festus Memorial Airport – Festus, Missouri
 * KFET – Fremont Municipal Airport – Fremont, Nebraska
 * KFFA – First Flight Airport – Kill Devil Hills, North Carolina
 * KFFC – Atlanta Regional Airport (Falcon Field) – Peachtree City, Georgia
 * KFFL – Fairfield Municipal Airport – Fairfield, Iowa
 * KFFM – Fergus Falls Municipal Airport (Einar Mickelson Field) – Fergus Falls, Minnesota
 * KFFO (FFO) – Wright-Patterson Air Force Base – Dayton, Ohio
 * KFFT – Capital City Airport – Frankfort, Kentucky
 * KFFZ (MSC) – Falcon Field – Mesa, Arizona
 * KFGU – Collegedale Municipal Airport – Collegedale, Tennessee
 * KFGX – Fleming-Mason Airport – Flemingsburg, Kentucky
 * KFHB – Fernandina Beach Municipal Airport – Fernandina Beach, Florida
 * KFHR (FRD) – Friday Harbor Airport – Friday Harbor, Washington
 * KFHU (FHU) – Sierra Vista Municipal Airport / Libby Army Airfield – Fort Huachuca / Sierra Vista, Arizona
 * KFIG – Clearfield-Lawrence Airport – Clearfield, Pennsylvania
 * KFIT (FIT) – Fitchburg Municipal Airport – Fitchburg, Massachusetts
 * KFKA – Fillmore County Airport – Preston, Minnesota
 * KFKL (FKL) – Venango Regional Airport – Franklin, Pennsylvania
 * KFKN – Franklin Municipal-John Beverly Rose Airport – Franklin, Virginia
 * KFKR – Frankfort Municipal Airport – Frankfort, Indiana
 * KFKS – Frankfort Dow Memorial Field – Frankfort, Michigan
 * KFLD – Fond du Lac County Airport – Fond du Lac, Wisconsin
 * KFLG (FLG) – Flagstaff Pulliam Airport – Flagstaff, Arizona
 * KFLL (FLL) – Fort Lauderdale-Hollywood International Airport – Fort Lauderdale / Hollywood, Florida
 * KFLO (FLO) – Florence Regional Airport – Florence, South Carolina
 * KFLP – Marion County Regional Airport – Flippin, Arkansas
 * KFLV (FLV) – Sherman Army Airfield – Fort Leavenworth, Kansas
 * KFLX – Fallon Municipal Airport – Fallon, Nevada
 * KFLY – Meadow Lake Airport – Colorado Springs, Colorado
 * KFME (FME) – Tipton Airport – Fort Meade / Odenton, Maryland
 * KFMH – Otis Air National Guard Base – Falmouth, Massachusetts
 * KFMM – Fort Morgan Municipal Airport – Fort Morgan, Colorado
 * KFMN – Four Corners Regional Airport – Farmington, New Mexico
 * KFMY (FMY) – Page Field – Fort Myers, Florida
 * KFMZ – Fairmont State Airfield – Fairmont, Nebraska
 * KFNB – Brenner Field – Falls City, Nebraska
 * KFNL – Fort Collins-Loveland Municipal Airport – Fort Collins / Loveland, Colorado
 * KFNT (FNT) – Bishop International Airport – Flint, Michigan
 * KFOA – Flora Municipal Airport – Flora, Illinois
 * KFOD (FOD) – Fort Dodge Regional Airport – Fort Dodge, Iowa
 * KFOE (FOE) – Topeka Regional Airport – Topeka, Kansas
 * KFOK (FOK) – Francis S. Gabreski Airport – Westhampton Beach, New York
 * KFOM – Fillmore Municipal Airport – Fillmore, Utah
 * KFOT – Rohnerville Airport – Fortuna, California
 * KFOZ – Bigfork Municipal Airport – Bigfork, Minnesota
 * KFPK (FPK) – Fitch H. Beach Airport – Charlotte, Michigan
 * KFPR (FPR) – Treasure Coast International Airport – Fort Pierce, Florida
 * KFQD – Rutherford County Airport (Marchman Field) – Rutherfordton, North Carolina
 * KFRG (FRG) – Republic Airport – East Farmingdale, New York
 * KFRH – French Lick Municipal Airport – French Lick, Indiana
 * KFRI (FRI) – Marshall Army Airfield – Fort Riley / Junction City, Kansas
 * KFRM – Fairmont Municipal Airport – Fairmont, Minnesota
 * KFRR – Front Royal-Warren County Airport – Front Royal, Virginia
 * KFSD (FSD) – Sioux Falls Regional Airport (Joe Foss Field) – Sioux Falls, South Dakota
 * KFSE – Fosston Municipal Airport – Fosston, Minnesota
 * KFSI (FSI) – Henry Post Army Airfield – Fort Sill / Lawton, Oklahoma
 * KFSK – Fort Scott Municipal Airport – Fort Scott, Kansas
 * KFSM (FSM) – Fort Smith Regional Airport – Fort Smith, Arkansas
 * KFSO – Franklin County State Airport – Highgate, Vermont
 * KFST – Fort Stockton-Pecos County Airport – Fort Stockton, Texas
 * KFSU – Fort Sumner Municipal Airport – Fort Sumner, New Mexico
 * KFSW – Fort Madison Municipal Airport – Fort Madison, Iowa
 * KFTG – Front Range Airport – Aurora, Colorado
 * KFTK (FTK) – Godman Army Airfield – Fort Knox, Kentucky
 * KFTT – Elton Hensley Memorial Airport – Fulton, Missouri
 * KFTW (FTW) – Fort Worth Meacham International Airport – Fort Worth, Texas
 * KFTY (FTY) – Fulton County Airport (Charlie Brown Field) – Atlanta, Georgia
 * KFUL – Fullerton Municipal Airport – Fullerton, California
 * KFVE (WFK) – Northern Aroostook Regional Airport – Frenchville, Maine
 * KFVX – Farmville Regional Airport – Farmville, Virginia
 * KFWA (FWA) – Fort Wayne International Airport – Fort Wayne, Indiana
 * KFWC – Fairfield Municipal Airport – Fairfield, Illinois
 * KFWN – Sussex Airport – Sussex, New Jersey
 * KFWQ (FWQ) – Rostraver Airport – Monongahela, Pennsylvania
 * KFWS – Fort Worth Spinks Airport – Fort Worth, Texas
 * KFXE – Fort Lauderdale Executive Airport – Fort Lauderdale, Florida
 * KFXY – Forest City Municipal Airport – Forest City, Iowa
 * KFYE – Fayette County Airport – Somerville, Tennessee
 * KFYJ – Middle Peninsula Regional Airport – West Point, Virginia
 * KFYM – Fayetteville Municipal Airport – Fayetteville, Tennessee
 * KFYV (FYV) – Drake Field (Fayetteville Executive Airport) – Fayetteville, Arkansas
 * KFZG – Fitzgerald Municipal Airport – Fitzgerald, Georgia
 * KFZI – Fostoria Metropolitan Airport – Fostoria, Ohio
 * KFZY – Oswego County Airport – Fulton, New York

KG

 * KGAB – Gabbs Airport – Gabbs, Nevada
 * KGAD – Northeast Alabama Regional Airport – Gadsden, Alabama
 * KGAF (GAF) – Grafton Municipal Airport – Grafton, North Dakota
 * KGAG - Gage Airport - Gage, Oklahoma
 * KGAI – Montgomery County Airpark – Gaithersburg, Maryland
 * KGAO – South Lafourche Leonard Miller Jr. Airport – Lafourche Parish, Louisiana
 * KGBD – Great Bend Municipal Airport – Great Bend, Kansas
 * KGBR – Walter J. Koladza Airport (Great Barrington Airport) – Great Barrington, Massachusetts
 * KGCC (GCC) – Gillette-Campbell County Airport – Gillette, Wyoming
 * KGCD - Seneca Emergency Airstrip - Seneca, Oregon
 * KGCK (GCK) – Garden City Regional Airport – Garden City, Kansas
 * KGCM - Claremore Regional Airport - Claremore, Oklahoma
 * KGCN (GCN) – Grand Canyon National Park Airport – Grand Canyon National Park, Arizona
 * KGDJ (GDJ) – Granbury Regional Airport – Granbury, Texas
 * KGDM (GDM) – Gardner Municipal Airport – Gardner, Massachusetts
 * KGDP - Dell City Municipal Airport - Dell City, Texas
 * KGDV – Dawson Community Airport – Glendive, Montana
 * KGDY – Grundy Municipal Airport – Grundy, Virginia
 * KGED – Delaware Coastal Airport (Georgetown Airport) – Georgetown, Delaware
 * KGEG (GEG) – Spokane International Airport – Spokane, Washington
 * KGEU – Glendale Municipal Airport – Glendale, Arizona
 * KGEV – Ashe County Airport – Jefferson, North Carolina
 * KGEY (GEY) – South Big Horn County Airport – Greybull, Wyoming
 * KGFA (GFA) – Malmstrom Air Force Base – Great Falls, Montana
 * KGFK (GFK) – Grand Forks International Airport – Grand Forks, North Dakota
 * KGFL (GFL) – Floyd Bennett Memorial Airport – Glens Falls, New York
 * KGGE – Georgetown County Airport – Georgetown, South Carolina
 * KGGF – Grant Municipal Airport – Grant, Nebraska
 * KGGG (GGG) – East Texas Regional Airport – Longview, Texas
 * KGGI – Grinnell Regional Airport (Billy Robinson Field) – Grinnell, Iowa
 * KGGW (GGW) – Glasgow Airport – Glasgow, Montana
 * KGHG (GHG) – Marshfield Municipal Airport (George Harlow Field) – Marshfield, Massachusetts
 * KGHM – Centerville Municipal Airport – Centerville, Tennessee
 * KGIC - Idaho County Airport - Grangeville, Idaho
 * KGIF – Winter Haven's Gilbert Airport (Gilbert Field) – Winter Haven, Florida
 * KGJT (GJT) – Grand Junction Regional Airport (Walker Field) – Grand Junction, Colorado
 * KGKJ – Port Meadville Airport – Meadville, Pennsylvania
 * KGKT (GKT) – Gatlinburg-Pigeon Forge Airport – Sevier County, Tennessee
 * KGKY – Arlington Municipal Airport – Arlington, Texas
 * KGLD – Goodland Municipal Airport (Renner Field) – Goodland, Kansas
 * KGLH (GLH) – Mid Delta Regional Airport – Greenville, Mississippi
 * KGLS (GLS) – Scholes International Airport at Galveston – Galveston, Texas
 * KGLW – Glasgow Municipal Airport – Glasgow, Kentucky
 * KGMJ - Grove Municipal Airport - Grove, Oklahoma
 * KGMU – Greenville Downtown Airport – Greenville, South Carolina
 * KGNB – Granby-Grand County Airport – Granby, Colorado
 * KGNC - Gaines County Airport - Seminole, Texas
 * KGNF – Grenada Municipal Airport – Grenada, Mississippi
 * KGNG – Gooding Municipal Airport – Gooding, Idaho
 * KGNI – Grand Isle Seaplane Base – Grand Isle, Louisiana
 * KGNT – Grants-Milan Municipal Airport – Grants, New Mexico
 * KGNV (GNV) – Gainesville Regional Airport – Gainesville, Florida
 * KGOK - Guthrie-Edmond Regional Airport - Guthrie, Oklahoma
 * KGON (GON) – Groton-New London Airport – Groton / New London, Connecticut
 * KGOO – Nevada County Air Park (Nevada County Airport) – Grass Valley, California
 * KGOV – Grayling Army Airfield – Grayling, Michigan
 * KGPI - See KFCA
 * KGPT (GPT) – Gulfport-Biloxi International Airport – Gulfport, Mississippi
 * KGPZ (GPZ) – Grand Rapids-Itasca County Airport – Grand Rapids, Minnesota
 * KGRB (GRB) – Austin Straubel International Airport – Green Bay, Wisconsin
 * KGRD – Greenwood County Airport – Greenwood, South Carolina
 * KGRF (GRF) – Gray Army Airfield – Fort Lewis, Washington
 * KGRI (GRI) – Central Nebraska Regional Airport – Grand Island, Nebraska
 * KGRK (GRK) – Killeen Regional Airport / Robert Gray Army Airfield – Fort Cavazos / Killeen, Texas
 * KGRN – Gordon Municipal Airport – Gordon, Nebraska
 * KGRR (GRR) – Gerald R. Ford International Airport – Grand Rapids, Michigan
 * KGSB (GSB) – Seymour Johnson Air Force Base – Goldsboro, North Carolina
 * KGSO (GSO) – Piedmont Triad International Airport – Greensboro, North Carolina
 * KGSP (GSP) – Greenville-Spartanburg International Airport – Greer, South Carolina
 * KGSW – Greater Southwest International Airport – Fort Worth, Texas (closed 1970s)
 * KGTB (GTB) – Wheeler-Sack Army Airfield – Fort Drum, New York
 * KGTE – Gothenburg Municipal Airport – Gothenburg, Nebraska
 * KGTF (GTF) – Great Falls International Airport – Great Falls, Montana
 * KGTG – Grantsburg Municipal Airport – Grantsburg, Wisconsin
 * KGTR – Golden Triangle Regional Airport – Columbus, Mississippi
 * KGTU – Georgetown Municipal Airport – Georgetown, Texas
 * KGUC (GUC) – Gunnison-Crested Butte Regional Airport – Gunnison, Colorado
 * KGUP (GUP) – Gallup Municipal Airport – Gallup, New Mexico
 * KGUS (GUS) – Grissom Air Reserve Base – Peru, Indiana
 * KGUY - Guymon Municipal Airport - Guymon, Oklahoma
 * KGVE – Gordonsville Municipal Airport – Gordonsville, Virginia
 * KGVQ – Genesee County Airport – Batavia, New York
 * KGVT – Majors Airport – Greenville, Texas
 * KGWB – DeKalb County Airport – Auburn, Indiana
 * KGWO (GWO) – Greenwood-Leflore Airport – Greenwood, Mississippi
 * KGWR – Gwinner-Roger Melroe Field (Gwinner Municipal Airfield) – Gwinner, North Dakota
 * KGWS – Glenwood Springs Municipal Airport – Glenwood Springs, Colorado
 * KGWW (GWW) – Goldsboro-Wayne Municipal Airport – Goldsboro, North Carolina
 * KGXA - Gray Butte Field - Lake Los Angeles, California
 * KGXF – Gila Bend Air Force Auxiliary Field – Gila Bend, Arizona
 * KGXY – Greeley-Weld County Airport – Greeley, Colorado
 * KGYB – Giddings-Lee County Airport – Giddings, Texas
 * KGYH – Donaldson Center Airport – Greenville, South Carolina
 * KGYI (GYI) – North Texas Regional Airport (Perrin Field) – Denison, Texas
 * KGYR – Phoenix Goodyear Airport – Goodyear, Arizona
 * KGYY (GYY) – Gary/Chicago International Airport – Gary, Indiana
 * KGZH – Middleton Field – Evergreen, Alabama
 * KGZL - Stigler Regional Airport - Stigler, Oklahoma

KH

 * KHAB – Marion County – Rankin Fite Airport – Hamilton, Alabama
 * KHAE (HAE) – Hannibal Regional Airport (William P. Lear Field) – Hannibal, Missouri
 * KHAF – Eddie Andreini Sr. Airfield (Half Moon Bay Airport) – Half Moon Bay, California
 * KHAI (HAI) – Three Rivers Municipal/Doctor Haines Airport – Three Rivers, Michigan
 * KHAO (HAO) – Butler County Regional Airport (Hogan Field) – Hamilton, Ohio
 * KHAR – Harford Airport – Casper, Wyoming
 * KHBC – Mohall Municipal Airport – Mohall, North Dakota
 * KHBG – Hattiesburg Bobby L. Chain Municipal Airport – Hattiesburg, Mississippi
 * KHBI – Asheboro Regional Airport – Asheboro, North Carolina
 * KHBR - Hobart Regional Airport - Hobart, Oklahoma
 * KHCR - Russ McDonald Field - Heber City, Utah
 * KHBZ – Heber Springs Municipal Airport – Heber Springs, Arkansas
 * KHCD – Hutchinson Municipal Airport (Butler Field) – Hutchinson, Minnesota
 * KHDE – Brewster Field – Holdrege, Nebraska
 * KHDN (HDN) – Yampa Valley Airport – Hayden, Colorado
 * KHDO (HDO) – South Texas Regional Airport at Hondo – Hondo, Texas
 * KHEE – Thompson-Robbins Airport – Helena, Arkansas
 * KHEF – Manassas Regional Airport (Harry P. Davis Field) – Manassas, Virginia
 * KHEG – Herlong Recreational Airport – Jacksonville, Florida
 * KHEI – Hettinger Municipal Airport – Hettinger, North Dakota
 * KHEQ – Holyoke Airport – Holyoke, Colorado
 * KHEY (HEY) – Hanchey Army Heliport – Fort Novosel / Ozark, Alabama
 * KHEZ – Natchez-Adams County Airport (Hardy-Anders Field) – Natchez, Mississippi
 * KHFD (HFD) – Hartford-Brainard Airport – Hartford, Connecticut
 * KHFF – Mackall Army Airfield – Camp Mackall, North Carolina
 * KHFJ – Monett Municipal Airport – Monett, Missouri
 * KHGR (HGR) – Hagerstown Regional Airport – Hagerstown, Maryland
 * KHHF - Hemphill County Airport - Canadian, Texas
 * KHHR (HHR) – Hawthorne Municipal Airport (Jack Northrop Field) – Hawthorne, California
 * KHHW - Stan Stamper Municipal Airport - Hugo, Oklahoma
 * KHIB (HIB) – Range Regional Airport – Hibbing, Minnesota
 * KHIE – Mount Washington Regional Airport – Whitefield, New Hampshire
 * KHIF (HIF) – Hill Air Force Base – Ogden, Utah
 * KHII – Lake Havasu City Airport – Lake Havasu City, Arizona
 * KHIO – Hillsboro Airport – Portland, Oregon
 * KHJH – Hebron Municipal Airport – Hebron, Nebraska
 * KHJO (HJO) – Hanford Municipal Airport – Hanford, California
 * KHKA – Blytheville Municipal Airport – Blytheville, Arkansas
 * KHKS – Hawkins Field – Jackson, Mississippi
 * KHKY (HKY) – Hickory Regional Airport – Hickory, North Carolina
 * KHLC – Hill City Municipal Airport – Hill City, Kansas
 * KHLG – Wheeling-Ohio County Airport – Wheeling, West Virginia
 * KHLN (HLN) – Helena Regional Airport – Helena, Montana
 * KHLR (HLR) – Yoakum–DeFrenn Army Heliport – Fort Cavazos / Killeen, Texas
 * KHLX – Twin County Airport – Galax-Hillsville, Virginia
 * KHMN (HMN) – Holloman Air Force Base – Alamogordo, New Mexico
 * KHMS - Richland Airport - Richland, Washington
 * KHMT – Hemet-Ryan Airport – Hemet, California
 * KHMZ – Bedford County Airport – Bedford, Pennsylvania
 * KHND (HSH) – Henderson Executive Airport – Henderson, Nevada
 * KHNZ – Henderson-Oxford Airport – Oxford, North Carolina
 * KHOB (HOB) – Lea County Regional Airport – Hobbs, New Mexico
 * KHOE – Homerville Airport – Homerville, Georgia
 * KHON (HON) – Huron Regional Airport – Huron, South Dakota
 * KHOP (HOP) – Campbell Army Airfield – Fort Campbell, Kentucky
 * KHOT (HOT) – Memorial Field Airport – Hot Springs, Arkansas
 * KHOU (HOU) – William P. Hobby Airport – Houston, Texas
 * KHPN (HPN) – Westchester County Airport – White Plains, New York
 * KHQG – Hugoton Municipal Airport – Hugoton, Kansas
 * KHQM (HQM) – Bowerman Airport – Hoquiam, Washington
 * KHQU – Thomson-McDuffie County Airport – Thomson, Georgia
 * KHQZ (HQZ) – Mesquite Metro Airport – Mesquite, Texas
 * KHRI – Hermiston Municipal Airport – Hermiston, Oregon
 * KHRJ (HRJ) – Harnett Regional Jetport – Erwin, North Carolina
 * KHRL (HRL) – Valley International Airport – Harlingen, Texas
 * KHRO (HRO) – Boone County Airport – Harrison, Arkansas
 * KHRT – Hurlburt Field – Okaloosa County, Florida
 * KHRU (HRU) – Herington Regional Airport – Herington, Kansas
 * KHRX - Hereford Municipal Airport - Hereford, Texas
 * KHSA – Stennis International Airport – Bay St. Louis, Mississippi
 * KHSE – Billy Mitchell Airport – Hatteras, North Carolina
 * KHSI – Hastings Municipal Airport – Hastings, Nebraska
 * KHSP (HSP) – Ingalls Field – Hot Springs, Virginia
 * KHSR – Hot Springs Municipal Airport – Hot Springs, South Dakota
 * KHST (HST) – Homestead Air Reserve Base – Homestead, Florida
 * KHSV (HSV) – Huntsville International Airport (Carl T. Jones Field) – Huntsville, Alabama
 * KHTH (HTH) – Hawthorne Industrial Airport – Hawthorne, Nevada
 * KHTO (HTO) – East Hampton Airport – East Hampton, New York
 * KHTS (HTS) – Tri-State Airport – Huntington, West Virginia
 * KHUA (HUA) – Redstone Army Airfield – Redstone Arsenal / Huntsville, Alabama
 * KHUF (HUF) – Terre Haute Regional Airport – Terre Haute, Indiana
 * KHUL – Houlton International Airport – Houlton, Maine
 * KHUM – Houma-Terrebonne Airport – Houma, Louisiana
 * KHUT (HUT) – Hutchinson Municipal Airport – Hutchinson, Kansas
 * KHVC – Hopkinsville-Christian County Airport – Hopkinsville, Kentucky
 * KHVE – Hanksville Airport – Hanksville, Utah
 * KHVN (HVN) – Tweed-New Haven Airport – New Haven, Connecticut
 * KHVR – Havre City County Airport – Havre, Montana
 * KHVS – Hartsville Regional Airport – Hartsville, South Carolina
 * KHWD (HWD) – Hayward Executive Airport – Hayward, California
 * KHWO – North Perry Airport – Hollywood, Florida
 * KHWQ – Wheatland County Airport – Harlowton, Montana
 * KHWV (WSH) – Brookhaven Airport – Shirley, New York
 * KHWY (HWY) – Warrenton-Fauquier Airport – Warrenton, Virginia
 * KHXD – Hilton Head Airport – Hilton Head Island, South Carolina
 * KHXF – Hartford Municipal Airport – Hartford, Wisconsin
 * KHYA (HYA) – Barnstable Municipal Airport – Hyannis, Massachusetts
 * KHYI – San Marcos Regional Airport – San Marcos, Texas
 * KHYR – Sawyer County Airport – Hayward, Wisconsin
 * KHYS (HYS) – Hays Regional Airport – Hays, Kansas
 * KHYW – Conway-Horry County Airport – Conway, South Carolina
 * KHYX – Saginaw County H.W. Browne Airport – Saginaw, Michigan
 * KHZE – Mercer County Regional Airport – Hazen, North Dakota
 * KHZL – Hazleton Regional Airport – Hazleton, Pennsylvania

KI

 * KIAB (IAB) – McConnell Air Force Base – Wichita, Kansas
 * KIAD (IAD) – Washington Dulles International Airport – Dulles, Virginia
 * KIAG (IAG) – Niagara Falls International Airport – Niagara Falls, New York
 * KIAH (IAH) – George Bush Intercontinental Airport – Houston, Texas
 * KIBM – Kimball Municipal Airport (Robert E. Arraj Field) – Kimball, Nebraska
 * KICR (ICR) – Winner Regional Airport (Bob Wiley Field) – Winner, South Dakota
 * KICT (ICT) – Wichita Dwight D. Eisenhower National Airport – Wichita, Kansas
 * KIDA (IDA) – Idaho Falls Regional Airport – Idaho Falls, Idaho
 * KIDI – Indiana County-Jimmy Stewart Airport – Indiana, Pennsylvania
 * KIDL – Indianola Municipal Airport – Indianola, Mississippi
 * KIDP – Independence Municipal Airport – Independence, Kansas
 * KIEN - Pine Ridge Airport - Pine Ridge, South Dakota
 * KIFP (IFP) – Laughlin/Bullhead International Airport – Bullhead City, Arizona
 * KIGM (IGM) – Kingman Airport – Kingman, Arizona
 * KIGX – Horace Williams Airport – Chapel Hill, North Carolina
 * KIIB – Independence Municipal Airport – Independence, Iowa
 * KIIY – Washington-Wilkes County Airport – Washington, Georgia
 * KIJD – Windham Airport – Willimantic, Connecticut
 * KIJX – Jacksonville Municipal Airport - Jacksonville, Illinois
 * KIKV (IKV) – Ankeny Regional Airport – Ankeny, Iowa
 * KIKW (IKW) – Jack Barstow Municipal Airport – Midland, Michigan
 * KILE (ILE) – Skylark Field – Killeen, Texas
 * KILG (ILG) – Wilmington Airport – Wilmington, Delaware
 * KILM (ILM) – Wilmington International Airport – Wilmington, North Carolina
 * KILN (ILN) – Wilmington Air Park – Wilmington, Ohio
 * KIML – Imperial Municipal Airport – Imperial, Nebraska
 * KIMM (IMM) – Immokalee Airport – Immokalee, Florida
 * KIMS – Madison Municipal Airport – Madison, Indiana
 * KIMT (IMT) – Ford Airport – Iron Mountain, Missouri
 * KIND (IND) – Indianapolis International Airport – Indianapolis, Indiana
 * KINJ (INJ) – Hillsboro Municipal Airport – Hillsboro, Texas
 * KINK - Winkler County Airport - Kermit, Texas
 * KINL (INL) - Falls International Airport - International Falls, Minnesota
 * KINS – Creech Air Force Base – Indian Springs, Nevada
 * KINT (INT) – Smith Reynolds Airport – Winston-Salem, North Carolina
 * KINW (INW) – Winslow-Lindbergh Regional Airport – Winslow, Arizona
 * KIOW – Iowa City Municipal Airport – Iowa City, Iowa
 * KIPJ – Lincolnton-Lincoln County Regional Airport – Lincolnton, North Carolina
 * KIPL – Imperial County Airport – Imperial, California
 * KIPT (IPT) – Williamsport Regional Airport – Williamsport, Pennsylvania
 * KIRK (IRK) – Kirksville Regional Airport – Kirksville, Missouri
 * KISM (ISM) – Kissimmee Gateway Airport – Kissimmee, Florida
 * KISN – Sloulin Field International Airport – Williston, North Dakota (closed 2019)
 * KISO – Kinston Regional Jetport (Stallings Field) – Kinston, North Carolina
 * KISP (ISP) – Long Island MacArthur Airport – Ronkonkoma, New York
 * KISW – South Wood County Airport (Alexander Field) – Wisconsin Rapids, Wisconsin
 * KITH (ITH) – Ithaca Tompkins International Airport – Ithaca, New York
 * KITR – Kit Carson County Airport – Burlington, Colorado
 * KIWA (AZA) – Phoenix-Mesa Gateway Airport – Mesa, Arizona
 * KIWI – Wiscasset Airport – Wiscasset, Maine
 * KIWD (IWD) – Gogebic-Iron County Airport – Ironwood, Michigan
 * KIXD – New Century AirCenter – Olathe, Kansas
 * KIYK – Inyokern Airport – Inyokern, California
 * KIZA – Santa Ynez Airport – Santa Ynez, California
 * KIZG – Eastern Slopes Regional Airport (Fryeburg Airport) – Fryeburg, Maine

KJ

 * KJAC (JAC) – Jackson Hole Airport – Jackson Hole, Wyoming
 * KJAN (JAN) – Jackson International Airport – Jackson, Mississippi
 * KJAX (JAX) – Jacksonville International Airport – Jacksonville, Florida
 * KJBR (JBR) – Jonesboro Municipal Airport – Jonesboro, Arkansas
 * KJCT - Kimble County Airport - Junction, Texas
 * KJDN – Jordan Airport – Jordan, Montana
 * KJEF – Jefferson City Memorial Airport – Jefferson City, Missouri
 * KJFK (JFK) – John F. Kennedy International Airport – New York, New York
 * KJFX – Walker County Airport (Bevill Field) – Jasper, Alabama
 * KJER – Jerome County Airport – Jerome, Idaho
 * KJGG – Williamsburg-Jamestown Airport – Williamsburg, Virginia
 * KJHN – Stanton County Municipal Airport – Johnson, Kansas
 * KJHW – Chautauqua County-Jamestown Airport – Jamestown, New York
 * KJKA (GUF) – Jack Edwards Airport – Gulf Shores, Alabama
 * KJLN (JLN) – Joplin Regional Airport – Joplin, Missouri
 * KJMS (JMS) – Jamestown Regional Airport – Jamestown, North Dakota
 * KJNX – Johnston Regional Airport – Smithfield, North Carolina
 * KJQF (USA) – Concord Regional Airport – Concord, North Carolina
 * KJRA – West 30th Street Heliport – Manhattan, New York City, New York
 * KJRB (JRB) – Downtown Manhattan Heliport – Manhattan, New York City, New York
 * KJST (JST) – Johnstown-Cambria County Airport – Johnstown, Pennsylvania
 * KJSV - Sallisaw Municipal Airport - Sallisaw, Oklahoma
 * KJVW – John Bell Williams Airport – Raymond, Mississippi
 * KJWG - Watonga Regional Airport - Watonga, Oklahoma
 * KJWN - John C. Tune Airport - Nashville, Tennessee
 * KJYO (JYO) – Leesburg Executive Airport (Godfrey Field) – Leesburg, Virginia
 * KJYR – York Municipal Airport – York, Nebraska
 * KJZI – Charleston Executive Airport – Charleston, South Carolina
 * KJZP – Pickens County Airport – Jasper, Georgia

KK

 * KKIC – Mesa Del Rey Airport – King City, California
 * KKLS (KLS) – Southwest Washington Regional Airport (was Kelso-Longview) – Kelso, Washington
 * KKNB (KNB) – Kanab Municipal Airport – Kanab, Utah
 * KKY8 (KY8) - Hancock County Airport - Lewisport, Kentucky

KL

 * KLAA – Lamar Municipal Airport – Lamar, Colorado
 * KLAF (LAF) – Purdue University Airport – West Lafayette, Indiana
 * KLAL (LAL) – Lakeland Linder International Airport – Lakeland, Florida
 * KLAM – Los Alamos Airport – Los Alamos, New Mexico
 * KLAN (LAN) – Capital Region International Airport – Lansing, Michigan
 * KLAR (LAR) – Laramie Regional Airport – Laramie, Wyoming
 * KLAS (LAS) – Harry Reid International Airport – Las Vegas, Nevada
 * KLAW - Lawton-Fort Sill Regional Airport - Lawton, Oklahoma
 * KLAX (LAX) – Los Angeles International Airport – Los Angeles, California
 * KLBB (LBB) – Lubbock Preston Smith International Airport – Lubbock, Texas
 * KLBE (LBE) – Arnold Palmer Regional Airport – Latrobe, Pennsylvania
 * KLBF (LBF) – North Platte Regional Airport (Lee Bird Field) – North Platte, Nebraska
 * KLBL (LBL) – Liberal Municipal Airport – Liberal, Kansas
 * KLBR (LBR) – Clarksville/Red River County Airport (J.D. Trissell Field) – Clarksville, Texas
 * KLBT – Lumberton Municipal Airport – Lumberton, North Carolina
 * KLBX (LJN) – Texas Gulf Coast Regional Airport – Angleton, Texas
 * KLCG – Wayne Municipal Airport (Stan Morris Field) – Wayne, Nebraska
 * KLCH (LCH) – Lake Charles Regional Airport – Lake Charles, Louisiana
 * KLCI – Laconia Municipal Airport – Laconia, New Hampshire
 * KLCK (LCK) – Rickenbacker International Airport – Columbus, Ohio
 * KLCQ – Lake City Gateway Airport – Lake City, Florida
 * KLDJ – Linden Airport – Linden, New Jersey
 * KLDM (LDM) – Mason County Airport – Ludington, Michigan
 * KLEB (LEB) – Lebanon Municipal Airport – West Lebanon, New Hampshire
 * KLEE (LEE) – Leesburg International Airport – Leesburg, Florida
 * KLEM – Lemmon Municipal Airport – Lemmon, South Dakota
 * KLEW – Auburn/Lewiston Municipal Airport – Auburn, Maine
 * KLEX – Blue Grass Airport – Lexington, Kentucky
 * KLFI – Langley Air Force Base – Hampton, Virginia
 * KLFK – Angelina County Airport – Lufkin, Texas
 * KLFT – Lafayette Regional Airport (Paul Fournet Field) – Lafayette, Louisiana
 * KLGA – La Guardia International Airport – New York, New York
 * KLGB – Long Beach Airport – Long Beach, California
 * KLGD – La Grande/Union County Airport – La Grande, Oregon
 * KLGF (LGF) – Laguna Army Airfield (Yuma Proving Ground) – Yuma, Arizona
 * KLGU – Logan-Cache Airport – Logan, Utah
 * KLHB – Hearne Municipal Airport – Hearne, Texas
 * KLHM – Lincoln Regional Airport (Karl Harder Field) – Lincoln, California
 * KLHQ – Fairfield County Airport – Lancaster, Ohio
 * KLHV – William T. Piper Memorial Airport – Lock Haven, Pennsylvania
 * KLHW (LIY) – MidCoast Regional Airport at Wright Army Airfield – Fort Stewart, Georgia (U.S. state)
 * KLHX – La Junta Municipal Airport – La Junta, Colorado
 * KLHZ – Triangle North Executive Airport (Franklin County Airport) – Louisburg, North Carolina
 * KLIC – Limon Municipal Airport – Limon, Colorado
 * KLIT – Bill and Hillary Clinton National Airport (Adams Field) – Little Rock, Arkansas


 * KLIZ – Loring Air Force Base –(Military, closed 09/1994), Reopened later as Loring International Airport,(Public) Aroostook County, Maine


 * KLKP – Lake Placid Airport – Lake Placid, New York
 * KLKR – Lancaster County Airport (McWhirter Field) – Lancaster, South Carolina
 * KLKU – Louisa County Airport (Freeman Field) – Louisa, Virginia
 * KLKV – Lake County Airport – Lakeview, Oregon
 * KLLJ – Challis Airport – Challis, Idaho
 * KLLQ – Monticello Municipal Airport (Ellis Field) – Monticello, Arkansas
 * KLLU – Lamar Municipal Airport – Lamar, Missouri
 * KLMO – Vance Brand Airport – Longmont, Colorado
 * KLMS – Louisville Winston County Airport – Louisville, Mississippi
 * KLMT – Crater Lake-Klamath Regional Airport – Klamath Falls, Oregon
 * KLNA – Palm Beach County Park Airport (Lantana Airport) – West Palm Beach, Florida
 * KLNC – Lancaster Regional Airport – Lancaster, Texas
 * KLND – Hunt Field – Lander, Wyoming
 * KLNK – Lincoln Airport – Lincoln, Nebraska
 * KLNN – Lost Nation Airport – Willoughby, Ohio
 * KLNP – Lonesome Pine Airport – Wise, Virginia
 * KLNS – Lancaster Airport – Lancaster, Pennsylvania
 * KLOL – Derby Field – Lovelock, Nevada
 * KLOR (LOR) – Lowe Army Heliport – Fort Novosel / Ozark, Alabama
 * KLOT (LOT) – Lewis University Airport – Romeoville, Illinois
 * KLOU – Bowman Field – Louisville, Kentucky
 * KLOZ – London-Corbin Airport (Magee Field) – London, Kentucky
 * KLPC – Lompoc Airport – Lompoc, California
 * KLPR – Lorain County Regional Airport – Lorain, Ohio
 * KLQK – Pickens County Airport – Pickens, South Carolina
 * KLQR – Larned-Pawnee County Airport – Larned, Kansas
 * KLRD (LRD) – Laredo International Airport – Laredo, Texas
 * KLRF – Little Rock Air Force Base – Jacksonville, Arkansas
 * KLRG – Lincoln Regional Airport – Lincoln, Maine
 * KLRU – Las Cruces International Airport – Las Cruces, New Mexico
 * KLSB – Lordsburg Municipal Airport – Lordsburg, New Mexico
 * KLSE (LSE) – La Crosse Regional Airport – La Crosse, Wisconsin
 * KLSF – Lawson Army Airfield – Fort Benning, Chattahoochee County, Georgia
 * KLSK – Lusk Municipal Airport – Lusk, Wyoming
 * KLSN – Los Banos Municipal Airport – Los Banos, California
 * KLSV (LSV) – Nellis Air Force Base – Las Vegas, Nevada
 * KLTS – (LTS) Altus Air Force Base – Altus, Oklahoma
 * KLTY – Liberty County Airport – Chester, Montana
 * KLUF (LUF) – Luke Air Force Base – Glendale, Arizona
 * KLUG – Ellington Airport – Lewisburg, Tennessee
 * KLUK (LUK) - Cincinnati Municipal Lunken Airport - Cincinnati, Ohio
 * KLUL – Hesler-Noble Field – Laurel, Mississippi
 * KLVK – Livermore Municipal Airport – Livermore, California
 * KLVL – Lawrenceville/Brunswick Municipal Airport – Lawrenceville, Virginia
 * KLVM – Mission Field – Livingston, Montana
 * KLVN – Airlake Airport – Lakeville, Minnesota
 * KLVS (LVS) – Las Vegas Municipal Airport – Las Vegas, New Mexico
 * KLWB – Greenbrier Valley Airport – Lewisburg, West Virginia
 * KLWC – Lawrence Municipal Airport – Lawrence, Kansas
 * KLWL – Wells Municipal Airport (Harriet Field) – Wells, Nevada
 * KLWM – Lawrence Municipal Airport – Lawrence, Massachusetts
 * KLWS – Lewiston-Nez Perce County Airport – Lewiston, Idaho
 * KLWT – Lewistown Municipal Airport – Lewistown, Montana
 * KLWV – Lawrenceville-Vincennes International Airport – Lawrenceville, Illinois
 * KLXL – Little Falls/Morrison County Airport (Lindbergh Field) – Little Falls, Minnesota
 * KLXN – Jim Kelly Field – Lexington, Nebraska
 * KLXT – Lee's Summit Municipal Airport – Lee's Summit, Missouri
 * KLXV – Lake County Airport (Leadville Airport) – Leadville, Colorado
 * KLYH – Lynchburg Regional Airport – Lynchburg, Virginia
 * KLYO – Lyons-Rice County Municipal Airport – Lyons, Kansas
 * KLZU – Gwinnett County Airport (Briscoe Field) – Lawrenceville, Georgia
 * KLZZ – Lampasas Airport – Lampasas, Texas

KM

 * KMAC (MAC) – Macon Downtown Airport (Herbert Smart Downtown Airport) – Macon, Georgia
 * KMAE – Madera Municipal Airport – Madera, California
 * KMAF (MAF) – Midland International Air and Space Port – Midland, Texas
 * KMAI – Marianna Municipal Airport – Marianna, Florida
 * KMAL – Malone-Dufort Airport – Malone, New York
 * KMAN - Nampa Municipal Airport - Nampa, Idaho
 * KMAO – Marion County Airport – Marion, South Carolina
 * KMAW – Malden Municipal Airport – Malden, Missouri
 * KMBG – Mobridge Municipal Airport – Mobridge, South Dakota
 * KMBO – Campbell Airport – Madison, Mississippi
 * KMBS (MBS) – MBS International Airport – Midland / Bay City / Saginaw, Michigan
 * KMBT (MBT) – Murfreesboro Municipal Airport – Murfreesboro, Tennessee
 * KMCB (MCB) – McComb-Pike County Airport (John E. Lewis Field) – McComb, Mississippi
 * KMCC (MCC) – McClellan Airfield – Sacramento, California
 * KMCE – Merced Regional Airport (MacReady Field) – Merced, California
 * KMCF (MCF) – MacDill Air Force Base – Tampa, Florida
 * KMCI (MCI) – Kansas City International Airport – Kansas City, Missouri
 * KMCK (MCK) – McCook Ben Nelson Regional Airport – McCook, Nebraska
 * KMCN (MCN) – Middle Georgia Regional Airport – Macon, Georgia
 * KMCO (MCO) – Orlando International Airport – Orlando, Florida
 * KMCW – Mason City Municipal Airport – Mason City, Iowa
 * KMCZ – Martin County Airport – Williamston, North Carolina
 * KMDD - Midland Airpark - Midland, Texas
 * KMDQ – Madison County Executive Airport (Tom Sharp Jr. Field) – Huntsville, Alabama
 * KMDS – Madison Municipal Airport – Madison, South Dakota
 * KMDT (MDT) – Harrisburg International Airport – Middletown, Pennsylvania
 * KMDW (MDW) – Chicago Midway International Airport – Chicago, Illinois
 * KMDZ – Taylor County Airport – Medford, Wisconsin
 * KMEB – Laurinburg-Maxton Airport – Maxton, North Carolina
 * KMEI (MEI) – Meridian Regional Airport (Key Field) – Meridian, Mississippi
 * KMEJ – Meade Municipal Airport – Meade, Kansas
 * KMEM (MEM) – Memphis International Airport – Memphis, Tennessee
 * KMER (MER) – Castle Airport – Atwater, California
 * KMEV – Minden–Tahoe Airport – Minden, Nevada
 * KMFE (MFE) – McAllen-Miller International Airport – McAllen, Texas
 * KMFI – Marshfield Municipal Airport (Wisconsin) – Marshfield, Wisconsin
 * KMFR (MFR) – Rogue Valley International-Medford Airport – Medford, Oregon
 * KMFV – Accomack County Airport – Melfa, Virginia
 * KMGE (MGE) – Dobbins Air Reserve Base (General Lucius D. Clay National Guard Center) – Marietta, Georgia
 * KMGG – Maple Lake Municipal Airport – Maple Lake, Minnesota
 * KMGJ – Orange County Airport – Montgomery, New York
 * KMGM (MGM) – Montgomery Regional Airport (Dannelly Field) – Montgomery, Alabama
 * KMGW (MGW) – Morgantown Municipal Airport – Morgantown, West Virginia
 * KMGY (MGY) – Dayton Wright Brothers Airport – Dayton, Ohio
 * KMHE (MHE) – Mitchell Municipal Airport – Mitchell, South Dakota
 * KMHK (MHK) – Manhattan Regional Airport – Manhattan, Kansas
 * KMHL – Marshall Memorial Municipal Airport – Marshall, Missouri
 * KMHN – Hooker County Airport – Mullen, Nebraska
 * KMHR (MHR) – Sacramento Mather Airport – Sacramento, California
 * KMHS - Dunsmuir Municipal-Mott Airport - Mount Shasta, California
 * KMHT (MHT) – Manchester-Boston Regional Airport – Manchester, New Hampshire
 * KMHV – Mojave Air and Space Port (Civilian Aerospace Test Center) – Mojave, California
 * KMIA (MIA) – Miami International Airport – Miami, Florida
 * KMIB (MIB) – Minot Air Force Base – Minot, North Dakota
 * KMIC – Crystal Airport – Crystal, Minnesota
 * KMIO – Miami Municipal Airport – Miami, Oklahoma
 * KMIT – Shafter Airport (Minter Field) – Shafter, California
 * KMIV (MIV) – Millville Executive Airport – Millville, New Jersey
 * KMJX – Robert J. Miller Air Park (Ocean County Airport) – Toms River, New Jersey
 * KMKA – Miller Municipal Airport – Miller, South Dakota
 * KMKC (MKC) – Charles B. Wheeler Downtown Airport – Kansas City, Missouri
 * KMKE (MKE) – Milwaukee Mitchell International Airport – Milwaukee, Wisconsin
 * KMKG (MKG) – Muskegon County Airport – Muskegon, Michigan
 * KMKJ – Mountain Empire Airport – Marion / Wytheville, Virginia
 * KMKL (MKL) – McKellar-Sipes Regional Airport – Jackson, Tennessee
 * KMKO - Davis Field - Muskogee, Oklahoma
 * KMKT (MKT) – Mankato Regional Airport – Mankato, Minnesota
 * KMKY – Marco Island Airport – Naples, Florida
 * KMLB (MLB) – Melbourne Orlando International Airport – Melbourne, Florida
 * KMLC - McAlester Regional Airport - McAlester, Oklahoma
 * KMLD – Malad City Airport – Malad City, Idaho
 * KMLE - Millard Airport - Omaha, Nebraska
 * KMLF (MLF) – Milford Municipal Airport (Ben and Judy Briscoe Field) – Milford, Utah
 * KMLI (MLI) – Quad Cities International Airport – Moline, Illinois
 * KMLS (MLS) – Miles City Municipal Airport – Miles City, Montana
 * KMLT – Millinocket Municipal Airport – Millinocket, Maine
 * KMLU (MLU) – Monroe Regional Airport – Monroe, Louisiana
 * KMMH (MMH) – Mammoth Yosemite Airport – Mammoth Lakes, California
 * KMMI – McMinn County Airport – Athens, Tennessee
 * KMMK – Meriden Markham Municipal Airport – Meriden, Connecticut
 * KMML (MML) – Southwest Minnesota Regional Airport (Marshall/Ryan Field) – Marshall, Minnesota
 * KMMS – Selfs Airport – Marks, Mississippi
 * KMMT – McEntire Joint National Guard Base – Eastover, South Carolina
 * KMMU (MMU) – Morristown Municipal Airport – Morristown, New Jersey
 * KMMV (MMV) – McMinnville Municipal Airport – McMinnville, Oregon
 * KMNI – Santee Cooper Regional Airport – Manning, South Carolina
 * KMNZ – Hamilton Municipal Airport – Hamilton, Texas
 * KMOB (MOB) – Mobile Regional Airport – Mobile, Alabama
 * KMOD (MOD) – Modesto City-County Airport – Modesto, California
 * KMOR – Morristown Regional Airport – Morristown, Tennessee
 * KMOT (MOT) – Minot International Airport – Minot, North Dakota
 * KMPE – Philadelphia Municipal Airport – Philadelphia, Mississippi
 * KMPI (MPI) – Mariposa-Yosemite Airport – Mariposa, California
 * KMPJ – Petit Jean Park Airport – Morrilton, Arkansas
 * KMPO – Pocono Mountains Municipal Airport – Mount Pocono, Pennsylvania
 * KMPR – McPherson Airport – McPherson, Kansas
 * KMPV – Edward F. Knapp State Airport – Barre-Montpelier, Vermont
 * KMQI – Dare County Regional Airport – Manteo, North Carolina
 * KMQJ (MQJ) – Indianapolis Regional Airport (Mount Comfort Airport) – Indianapolis, Indiana
 * KMQS (CTH) – Chester County G. O. Carlson Airport – Coatesville, Pennsylvania
 * KMQY (MQY) – Smyrna Airport – Smyrna, Tennessee
 * KMRB (MRB) – Eastern West Virginia Regional Airport (Shepherd Field) – Martinsburg, West Virginia
 * KMRF - Marfa Municipal Airport - Marfa, Texas
 * KMRH – Michael J. Smith Field – Beaufort, North Carolina
 * KMRN (MRN) – Foothills Regional Airport – Morganton, North Carolina
 * KMRY (MRY) – Monterey Regional Airport – Monterey, California
 * KMSL (MSL) – Northwest Alabama Regional Airport – Muscle Shoals, Alabama
 * KMSN (MSN) – Dane County Regional Airport – Madison, Wisconsin
 * KMSO (MSO) – Missoula International Airport – Missoula, Montana
 * KMSP (MSP) – Minneapolis-Saint Paul International Airport – Bloomington, Minnesota
 * KMSS (MSS) – Massena International Airport – Massena, New York
 * KMSV – Sullivan County International Airport – Monticello, New York
 * KMSY (MSY) – Louis Armstrong New Orleans International Airport – New Orleans, Louisiana
 * KMTC (MTC) – Selfridge Air National Guard Base – Mt. Clemens, Michigan
 * KMTH (MTH) – Florida Keys Marathon Airport – Marathon, Florida
 * KMTJ – Montrose Regional Airport – Montrose, Colorado
 * KMTN (MTN) – Martin State Airport – Baltimore, Maryland
 * KMTP (MTP) – Montauk Airport – Montauk, New York
 * KMTV – Blue Ridge Airport – Martinsville, Virginia
 * KMTW – Manitowoc County Airport – Manitowoc, Wisconsin
 * KMUO (MUO) – Mountain Home Air Force Base – Mountain Home, Idaho
 * KMUT – Muscatine Municipal Airport – Muscatine, Iowa
 * KMUU – Huntingdon County Airport – Mount Union, Pennsylvania (closed)
 * KMVC (MVC) – Monroe County Airport – Monroeville, Alabama
 * KMVI – Monte Vista Municipal Airport – Monte Vista, Colorado
 * KMVL – Morrisville-Stowe State Airport – Morrisville, Vermont
 * KMVM – Machias Valley Airport – Machias, Maine
 * KMVY (MVY) – Martha's Vineyard Airport – Vineyard Haven, Massachusetts
 * KMWH – Grant County International Airport – Moses Lake, Washington
 * KMWC - Lawrence J. Timmerman Airport - Milwaukee, Wisconsin
 * KMWK – Mount Airy/Surry County Airport – Mount Airy, North Carolina
 * KMWL – Mineral Wells Airport – Mineral Wells, Texas
 * KMXA – Manila Municipal Airport – Manila, Arkansas
 * KMXF (MXF) – Maxwell Air Force Base – Montgomery, Alabama
 * KMXO – Monticello Regional Airport – Monticello, Iowa
 * KMYF – Montgomery-Gibbs Executive Airport – San Diego, California
 * KMYL – McCall Municipal Airport – McCall, Idaho
 * KMYR (MYR) – Myrtle Beach International Airport – Myrtle Beach, South Carolina
 * KMYV (MYV) – Yuba County Airport – Marysville, California
 * KMYZ – Marysville Municipal Airport – Marysville, Kansas
 * KMZJ (MZJ) – Pinal Airpark – Marana, Arizona

KN

 * KNAB – Naval Air Station Albany – Albany, Georgia
 * KNBC (BFT) – Marine Corps Air Station Beaufort – Beaufort, South Carolina
 * KNBG (NBG) - Naval Air Station Joint Reserve Base New Orleans - Belle Chasse, Louisiana
 * KNBJ (NHX) – Naval Outlying Landing Field Barin – Foley, Alabama
 * KNBW (NBW) – Leeward Point Field – Guantanamo Bay, Cuba
 * KNCA (NCA) – Marine Corps Air Station New River – Jacksonville, North Carolina
 * KNDY – Naval Surface Warfare Center Dahlgren – Dahlgren, Virginia
 * KNDZ - Naval Air Station Whiting Field South - Milton, Florida
 * KNEL (NEL) – Naval Air Engineering Station Lakehurst – Lakehurst, New Jersey
 * KNEN – Naval Outlying Landing Field Whitehouse – Jacksonville, Florida
 * KNEW (NEW) – Lakefront Airport – New Orleans, Louisiana
 * KNFD – Naval Outlying Landing Field Summerdale – Summerdale, Alabama
 * KNFE – Naval Auxiliary Landing Field Fentress – Chesapeake, Virginia
 * KNFG (NFG) – Marine Corps Air Station Camp Pendleton – Camp Pendleton, California
 * KNFJ – Naval Outlying Landing Field Choctaw – Milton, Florida
 * KNFL (NFL) – Naval Air Station Fallon – Fallon, Nevada
 * KNFW – Naval Air Station Joint Reserve Base Fort Worth – Fort Worth, Texas
 * KNGP (NGP) – Naval Air Station Corpus Christi – Corpus Christi, Texas
 * KNGS – Naval Outlying Landing Field Santa Rosa – Milton, Florida
 * KNGU (NGU) – Naval Station Norfolk – Norfolk, Virginia
 * KNGZ – Naval Air Station Alameda – Alameda, California
 * KNHK (NHK) – Naval Air Station Patuxent River – Patuxent River, Maryland
 * KNHL – Naval Outlying Landing Field Wolf – Foley, Alabama
 * KNHZ – Naval Air Station Brunswick – Brunswick, Maine (converted to civilian use see KBXM)
 * KNID – Naval Air Weapons Station China Lake – Ridgecrest, California
 * KNIP (NIP) – Naval Air Station Jacksonville – Jacksonville, Florida
 * KNJK (NJK) – Naval Air Facility El Centro – El Centro, California
 * KNJM – Marine Corps Auxiliary Landing Field Bogue – Swansboro, North Carolina
 * KNJW – Naval Outlying Landing Field Joe Williams – Meridian, Mississippi
 * KNKL – Naval Outlying Landing Field Holley – Fort Walton Beach, Florida
 * KNKT (NKT) – Marine Corps Air Station Cherry Point – Cherry Point, North Carolina
 * KNKX (NKX) – Marine Corps Air Station Miramar – San Diego, California
 * KNLC – Naval Air Station Lemoore – Lemoore, California
 * KNMM (NMM) – Naval Air Station Meridian – Meridian, Mississippi
 * KNOW – Coast Guard Air Station Port Angeles – Port Angeles, Washington
 * KNPA (NPA) – Naval Air Station Pensacola – Pensacola, Florida
 * KNPI – Naval Outlying Landing Field Site 8 – Pensacola, Florida
 * KNQA (NQA) – Millington Regional Jetport – Millington, Tennessee
 * KNQB – Naval Outlying Landing Field Silverhill – Robertsdale, Alabama
 * KNQX (NQX) – Naval Air Station Key West – Boca Chica Key, Florida
 * KNRA – Naval Outlying Landing Field Coupeville – Coupeville, Washington
 * KNRB – Naval Station Mayport – Jacksonville, Florida
 * KNRN – Norton Municipal Airport – Norton, Kansas
 * KNRQ – Naval Outlying Landing Field Spencer – Pace, Florida
 * KNRS – Naval Outlying Landing Field Imperial Beach – Imperial Beach, California
 * KNSE - Naval Air Station Whiting Field North - Milton, Florida
 * KNSI – Naval Outlying Landing Field San Nicolas Island – San Nicolas Island, California
 * KNTD (NTD) – Naval Air Station Point Mugu – Oxnard, California
 * KNTK – Marine Corps Air Station Tustin – Santa Ana, California
 * KNTU (NTU) – Naval Air Station Oceana – Virginia Beach, Virginia
 * KNUC – Naval Auxiliary Landing Field San Clemente Island – San Clemente, California
 * KNUI – Naval Outlying Landing Field Webster – Saint Inigoes, Maryland
 * KNUN – Naval Outlying Landing Field Saufley – Pensacola, Florida
 * KNUQ (NUQ) – Moffett Federal Airfield – Mountain View, California
 * KNUW – Naval Air Station Whidbey Island – Oak Harbor, Washington
 * KNVI – Naval Outlying Landing Field Pace – Wallace, Florida
 * KNWL – Naval Outlying Landing Field Waldron – Corpus Christi, Texas
 * KNYG – Marine Corps Air Facility Quantico – Quantico, Virginia
 * KNYL (YUM) – Yuma International Airport / Marine Corps Air Station Yuma – Yuma, Arizona
 * KNXF – Marine Corps Outlying Field (Red Beach) Camp Pendleton - Camp Pendleton, California
 * KNXP – Marine Corps Air Ground Combat Center Twentynine Palms – Twentynine Palms, California
 * KNXX – Naval Air Station Joint Reserve Base Willow Grove – Willow Grove, Pennsylvania
 * KNZJ – Marine Corps Air Station El Toro – Santa Ana, California
 * KNZY (NZY) – Naval Air Station North Island – San Diego, California

KO

 * KOAJ – Albert J. Ellis Airport – Jacksonville, North Carolina
 * KOAK – Oakland International Airport – Oakland, California
 * KOAR – Marina Municipal Airport – Marina, California
 * KOBE – Okeechobee County Airport – Okeechobee, Florida
 * KOBI – Woodbine Municipal Airport – Woodbine, New Jersey
 * KOCF – Ocala International Airport (Jim Taylor Field) – Ocala, Florida
 * KOCH (OCH) – Nacogdoches A.L. Mangham Jr. Regional Airport – Nacogdoches, Texas
 * KOCW – Washington–Warren Airport – Washington, North Carolina
 * KODO - Odessa-Schlemeyer Field - Odessa, Texas
 * KODX – Evelyn Sharp Field – Ord, Nebraska
 * KOEL – Oakley Municipal Airport – Oakley, Kansas
 * KOFF – Offutt Air Force Base – Omaha, Nebraska
 * KOFK – Norfolk Regional Airport (Karl Stefan Memorial Field) – Norfolk, Nebraska
 * KOFP – Hanover County Municipal Airport – Richmond / Ashland, Virginia
 * KOGA – Searle Field – Ogallala, Nebraska
 * KOGB – Orangeburg Municipal Airport – Orangeburg, South Carolina
 * KOGD – Ogden-Hinckley Airport – Ogden, Utah
 * KOGS – Ogdensburg International Airport – Ogdensburg, New York
 * KOIC – Lt. Warren Eaton Airport – Norwich, New York
 * KOIN – Oberlin Municipal Airport – Oberlin, Kansas
 * KOJA - Thomas P. Stafford Airport - Weatherford, Oklahoma
 * KOJC – Johnson County Executive Airport – Olathe, Kansas
 * KOKB – Oceanside Municipal Airport (Bob Maxwell Field) – Oceanside, California
 * KOKC (OKC) – Will Rogers World Airport – Oklahoma City, Oklahoma
 * KOKK – Kokomo Municipal Airport – Kokomo, Indiana
 * KOKM - Okmulgee Regional Airport - Okmulgee, Oklahoma
 * KOKS – Garden County Airport – Oshkosh, Nebraska
 * KOKV – Winchester Regional Airport – Winchester, Virginia
 * KOLD (OLD) – Old Town Municipal Airport and Seaplane Base (Dewitt Field) – Old Town, Maine
 * KOLE – Cattaraugus County-Olean Airport – Olean, New York
 * KOLF – L. M. Clayton Airport – Wolf Point, Montana
 * KOLM – Olympia Regional Airport – Olympia, Washington
 * KOLS (OLS) – Nogales International Airport – Nogales, Arizona
 * KOLU – Columbus Municipal Airport – Columbus, Nebraska
 * KOLV – Olive Branch Airport – Olive Branch, Mississippi
 * KOLZ – Oelwein Municipal Airport – Oelwein, Iowa
 * KOMA – Eppley Field – Omaha, Nebraska
 * KOMH – Orange County Airport – Orange, Virginia
 * KOMK – Omak Airport – Omak, Washington
 * KOMN – Ormond Beach Municipal Airport – Ormond Beach, Florida
 * KONA – Winona Municipal Airport (Max Conrad Field) – Winona, Minnesota
 * KONL – O'Neill Municipal Airport (John L. Baker Field) – O'Neill, Nebraska
 * KONM (ONM) – Socorro Municipal Airport – Socorro, New Mexico
 * KONO – Ontario Municipal Airport – Ontario, Oregon
 * KONP – Newport Municipal Airport – Newport, Oregon
 * KONT – Ontario International Airport – Ontario, California
 * KONX – Currituck County Regional Airport – Currituck, North Carolina
 * KOPF – Miami-Opa Locka Executive Airport – Opa-locka, Florida
 * KOPL – St. Landry Parish Airport (Ahart Field) – Opelousas, Louisiana
 * KOQN – Brandywine Airport – West Chester, Pennsylvania
 * KOQU (NCO) – Quonset State Airport – North Kingstown, Rhode Island
 * KORB – Orr Regional Airport – Orr, Minnesota
 * KORD – O'Hare International Airport – Chicago, Illinois
 * KORE – Orange Municipal Airport – Orange, Massachusetts
 * KORF – Norfolk International Airport – Norfolk, Virginia
 * KORG – Orange County Airport – Orange, Texas
 * KORH – Worcester Regional Airport – Worcester, Massachusetts
 * KORL – Orlando Executive Airport – Orlando, Florida
 * KORS (ESD) – Orcas Island Airport – Eastsound, Washington
 * KOSC (OSC) – Oscoda-Wurtsmith Airport – Oscoda, Michigan
 * KOSH – Wittman Regional Airport – Oshkosh, Wisconsin
 * KOSU (OSU) – Ohio State University Airport (OSU Don Scott Airport) – Columbus, Ohio
 * KOSX – Kosciusko-Attala County Airport – Kosciusko, Mississippi
 * KOTH – Southwest Oregon Regional Airport – North Bend, Oregon
 * KOTM – Ottumwa Regional Airport – Ottumwa, Iowa
 * KOUN – University of Oklahoma Westheimer Airport – Norman, Oklahoma
 * KOVE – Oroville Municipal Airport – Oroville, California
 * KOVS – Boscobel Airport – Boscobel, Wisconsin
 * KOWB – Owensboro-Daviess County Regional Airport – Owensboro, Kentucky
 * KOWD – Norwood Memorial Airport – Norwood, Massachusetts
 * KOWI – Ottawa Municipal Airport – Ottawa, Kansas
 * KOWK – Central Maine Airport of Norridgewock – Norridgewock, Maine
 * KOXB (OCE) – Ocean City Municipal Airport – Ocean City, Maryland
 * KOXC – Waterbury-Oxford Airport – Oxford, Connecticut
 * KOXD – Miami University Airport – Oxford, Ohio
 * KOXR – Oxnard Airport – Oxnard, California
 * KOYM – St. Marys Municipal Airport – Saint Marys, Pennsylvania
 * KOZA - Ozona Municipal Airport - Ozona, Texas
 * KOZR (OZR) – Cairns Army Airfield – Fort Novosel / Ozark, Alabama
 * KOZS (OZS) – Camdenton Memorial Airport – Camdenton, Missouri
 * KOZW – Livingston County Spencer J. Hardy Airport – Howell, Michigan

KP

 * KPAE (PAE) – Snohomish County Airport (Paine Field) – Everett, Washington
 * KPAH (PAH) - Barkley Regional Airport - Paducah, Kentucky
 * KPAM – Tyndall AFB – Panama City, FL
 * KPAN (PJB) – Payson Airport – Payson, Arizona
 * KPAO – Palo Alto Airport – Palo Alto, California
 * KPBF – Grider Field – Pine Bluff, Arkansas
 * KPBG (PBG) – Plattsburgh International Airport – Plattsburgh, New York
 * KPBI (PBI) – Palm Beach International Airport – West Palm Beach, Florida
 * KPBX – Pike County Airport (Hatcher Field) – Pikeville, Kentucky
 * KPCM – Plant City Airport – Plant City, Florida
 * KPCU – Picayune-Pearl River County Airport – Picayune, Mississippi
 * KPCW – Erie–Ottawa International Airport – Port Clinton, Ohio
 * KPCZ – Waupaca Municipal Airport (Brunner Field) – Waupaca, Wisconsin
 * KPDC – Prairie du Chien Municipal Airport – Prairie du Chien, Wisconsin
 * KPDK (PDK) – DeKalb-Peachtree Airport – Atlanta, Georgia
 * KPDT (PDT) – Eastern Oregon Regional Airport – Pendleton, Oregon
 * KPDX (PDX) – Portland International Airport – Portland, Oregon
 * KPEO – Penn Yan Airport (Yates County Airport) – Penn Yan, New York
 * KPEQ (PEQ) - Pecos Municipal Airport - Pecos, Texas
 * KPFC – Pacific City State Airport – Pacific City, Oregon
 * KPFN – Panama City-Bay County International Airport – Panama City, FL (closed in 2010)
 * KPGA (PGA) – Page Municipal Airport – Page, Arizona
 * KPGD (PGD) – Punta Gorda Airport – Punta Gorda, Florida
 * KPGR – Kirk Field – Paragould, Arkansas
 * KPGV (PGV) – Pitt-Greenville Airport – Greenville, North Carolina
 * KPHD – Harry Clever Field Airport – New Philadelphia, Ohio
 * KPHF (PHF) – Newport News/Williamsburg International Airport – Newport News, Virginia
 * KPHG – Phillipsburg Municipal Airport – Phillipsburg, Kansas
 * KPHH – Robert F. Swinnie Airport – Andrews, South Carolina
 * KPHK – Palm Beach County Glades Airport – Pahokee, Florida
 * KPHL (PHL) – Philadelphia International Airport – Philadelphia, Pennsylvania
 * KPHP – Philip Airport – Philip, South Dakota
 * KPHT – Henry County Airport – Paris, Tennessee
 * KPHX (PHX) – Phoenix Sky Harbor International Airport – Phoenix, Arizona
 * KPIA (PIA) – General Wayne A. Downing Peoria International Airport – Peoria, Illinois
 * KPIB (PIB) – Hattiesburg-Laurel Regional Airport – Hattiesburg, Mississippi
 * KPIE (PIE) – St. Pete-Clearwater International Airport – St. Petersburg, Florida
 * KPIH (PIH) – Pocatello Regional Airport – Pocatello, Idaho
 * KPIR (PIR) – Pierre Regional Airport – Pierre, South Dakota
 * KPIT (PIT) – Pittsburgh International Airport – Pittsburgh, Pennsylvania
 * KPKB (PKB) – Mid-Ohio Valley Regional Airport – Parkersburg, West Virginia
 * KPKV (PKV) – Calhoun County Airport – Port Lavaca, Texas
 * KPLB (PLB) – Clinton County Airport – Plattsburgh, New York (closed)
 * KPLK – M. Graham Clark Downtown Airport – Point Lookout, Missouri
 * KPLN (PLN) – Pellston Regional Airport – Pellston, Michigan
 * KPLR (PLR) – St. Clair County Airport – Pell City, Alabama
 * KPLU (PLU) - Pierce County Airport (Thun Field) - Graham, Washington
 * KPMB – Pembina Municipal Airport – Pembina, North Dakota
 * KPMD – Palmdale Regional Airport – Palmdale, California
 * KPMV (PMV) – Plattsmouth Municipal Airport – Plattsmouth, Nebraska
 * KPMZ (PMZ) – Plymouth Municipal Airport – Plymouth, North Carolina
 * KPNA (PWY) – Ralph Wenz Field – Pinedale, Wyoming
 * KPNC (PNC) - Ponca City Regional Airport - Ponca City, Oklahoma
 * KPNE (PNE) – Northeast Philadelphia Airport – Philadelphia, Pennsylvania
 * KPNM (PNM) – Princeton Municipal Airport – Princeton, Minnesota
 * KPNN (PNN) – Princeton Municipal Airport – Princeton, Maine
 * KPNS (PNS) – Pensacola International Airport – Pensacola, Florida
 * KPOB – Pope Field (military) – Fayetteville, North Carolina
 * KPOC – Brackett Field – La Verne, California
 * KPOU – Hudson Valley Regional Airport (Poughkeepsie Airport) – Poughkeepsie, New York
 * KPOY – Powell Municipal Airport – Powell, Wyoming
 * KPPA (PPA) – Perry LeFors Field – Pampa, Texas
 * KPPF – Tri-City Airport – Parsons, Kansas
 * KPQI (PQI) – Presque Isle International Airport – Presque Isle, Maine
 * KPQL (PGL) – Trent Lott International Airport – Pascagoula, Mississippi
 * KPRB – Paso Robles Municipal Airport – Paso Robles, California
 * KPRC (PRC) – Ernest A. Love Field – Prescott, Arizona
 * KPRN – Mac Crenshaw Memorial Airport – Greenville, Alabama
 * KPRX – Cox Field – Paris, Texas
 * KPSB – Mid-State Regional Airport – Philipsburg, Pennsylvania
 * KPSC (PSC) – Tri-Cities Airport – Pasco, Washington
 * KPSF – Pittsfield Municipal Airport – Pittsfield, Massachusetts
 * KPSK – New River Valley Airport – Dublin, Virginia
 * KPSM – Portsmouth International Airport at Pease – Portsmouth, New Hampshire
 * KPSN (PSN) – Palestine Municipal Airport – Palestine, Texas
 * KPSO – Stevens Field – Pagosa Springs, Colorado
 * KPSP (PSP) – Palm Springs International Airport – Palm Springs, California
 * KPTB – Dinwiddie County Airport – Petersburg, Virginia
 * KPTD – Potsdam Municipal Airport (Damon Field) – Potsdam, New York
 * KPTK (PTK) – Oakland County International Airport – Waterford Township, Michigan
 * KPTN – Harry P. Williams Memorial Airport – Patterson, Louisiana
 * KPTS – Atkinson Municipal Airport – Pittsburg, Kansas
 * KPTT (PTT) – Pratt Regional Airport – Pratt, Kansas
 * KPTV (PTV) – Porterville Municipal Airport – Porterville, California
 * KPTW – Heritage Field – Pottstown, Pennsylvania
 * KPUB (PUB) – Pueblo Memorial Airport – Pueblo, Colorado
 * KPUC – Carbon County Regional Airport (Buck Davis Field) – Price, Utah
 * KPUJ – Silver Comet Field at Paulding Northwest Atlanta Airport – Dallas, Georgia
 * KPUW (PUW) – Pullman-Moscow Regional Airport – Pullman, Washington
 * KPVB – Platteville Municipal Airport – Platteville, Wisconsin
 * KPVC – Provincetown Municipal Airport – Provincetown, Massachusetts
 * KPVD (PVD) – T.F. Green State Airport – Providence, Rhode Island
 * KPVE – Beech River Regional Airport – Darden, Tennessee
 * KPVF – Placerville Airport – Placerville, California
 * KPVG – Hampton Roads Executive Airport – Chesapeake, Virginia
 * KPVJ - Pauls Valley Municipal Airport - Pauls Valley, Oklahoma
 * KPVU (PVU) – Provo Municipal Airport – Provo, Utah
 * KPVW (PVW) - Hale County Airport - Plainview, Texas
 * KPWA (PWA) - Wiley Post Airport - Oklahoma City, Oklahoma
 * KPWD – Sher-Wood Airport – Plentywood, Montana
 * KPWK (PWK) – Chicago Executive Airport (formerly PalWaukee) – Wheeling, Illinois
 * KPWM (PWM) – Portland International Jetport – Portland, Maine
 * KPWT (PWT) – Bremerton National Airport – Bremerton, Washington
 * KPXE (PXE) – Perry-Houston County Airport – Perry, Georgia
 * KPYG – Pageland Airport – Pageland, South Carolina
 * KPYM (PYM) – Plymouth Municipal Airport – Plymouth, Massachusetts
 * KPYP (PYP) – Centre-Piedmont-Cherokee County Regional Airport – Centre, Alabama
 * KPYX (PYX) – Perryton Ochiltree County Airport - Perryton, Texas

KQ
(METAR weather station sites operated by the U.S. Department of Defense)


 * KQA7 – Tarin Kowt, Afghanistan
 * KQAD – FOB Echo, Al Diwaniyah, Iraq
 * KQAE – al Musayyib FOB, Iraq
 * KQAJ – Al Asad AB, Iraq
 * KQAO – Hanau AAF, Germany (closed since 2007)
 * KQAQ – Camp Taji, Iraq
 * KQAX – Camp Victory (BIAP), Iraq
 * KQAY – Patton AAF, Camp Arifjan, Kuwait
 * KQCO – FOB Q-West (Al-Qayyarah), Iraq
 * KQCT – Ar Ramadi, Iraq
 * KQCU – Fort Chaffee, Arkansas
 * KQD9 – FOB Salerno, Khost, Afghanistan
 * KQDM – Orgun, Afghanistan
 * KQEZ – Al Taqaddum AB, Iraq
 * KQGV – Ali Al Salem AB, Kuwait
 * KQGX – Al Dhafra AB, United Arab Emirates
 * KQIR – Al Udeid AB, Qatar
 * KQIU – Fire Base Lilley, Shkin, Afghanistan
 * KQL5 – Jalalabad, Afghanistan
 * KQMA – Camp Fallujah, Iraq
 * KQMG – Mudaysis, Iraq
 * KQMH – Camp Korean Village (KV) (Ar Rutbah), Iraq
 * KQNC – Souda Bay AB, Greece
 * KQNN – Naples, Italy
 * KQNS – NAS Sigonella, Italy
 * KQNT – NAS Keflavik, Iceland
 * KQNY – Camp Ramadi, Iraq
 * KQOS – Oscura Range, New Mexico
 * KQPC – Camp Gannon (Husaybah), Iraq
 * KQPD – COP Haditha, Iraq
 * KQRY – Ghazni, Afghanistan
 * KQSA – Bagram AB, Afghanistan
 * KQSE – Mosul North, Iraq
 * KQSL – COB Speicher (Al Sahra Airfield), Iraq
 * KQSM – Misawa AB, Japan
 * KQSR – Sharan, Afghanistan
 * KQTA – NAF Atsugi, Japan
 * KQTI – Tal Afar, Iraq
 * KQTO – Joint Base Balad/LSA Anaconda, Iraq
 * KQTU – FOB Marez (Mosul), Iraq
 * KQTX – Kirkuk AB, Iraq
 * KQTZ – Baghdad International Airport, Iraq
 * KQVO – Al-Qa'im, Iraq
 * KQWM – Camp Buehring, Kuwait
 * KQXJ – Ali Air Base (Nasiriyah), Iraq
 * KQXN – Najaf, Iraq
 * KQYB – Faurei, Romania

KR

 * KRAC (RAC) – John H. Batten Airport (Batten International Airport) – Racine, Wisconsin
 * KRAL – Riverside Municipal Airport – Riverside, California
 * KRAP (RAP) – Rapid City Regional Airport – Rapid City, South Dakota
 * KRAW (RAW) – Warsaw Municipal Airport – Warsaw, Missouri
 * KRBD (RBD) – Dallas Executive Airport – Dallas, Texas
 * KRBE – Rock County Airport – Bassett, Nebraska
 * KRBG (RBG) – Roseburg Regional Airport (Major General Marion E. Carl Memorial Field) – Roseburg, Oregon
 * KRBL – Red Bluff Municipal Airport – Red Bluff, California
 * KRBM – Robinson Army Airfield – Camp Robinson, Arkansas
 * KRBW (RBW) – Lowcountry Regional Airport – Walterboro, South Carolina
 * KRCA – Ellsworth Air Force Base – Rapid City, South Dakota
 * KRCE (RCE) - Clarence E. Page Municipal Airport - Oklahoma City, Oklahoma
 * KRCM – SkyHaven Airport – Warrensburg, Missouri
 * KRCT (RCT) – Nartron Field – Reed City, Michigan
 * KRDD (RDD) – Redding Municipal Airport – Redding, California
 * KRDG (RDG) – Reading Regional Airport – Reading, Pennsylvania
 * KRDM (RDM) – Roberts Field (Redmond Municipal Airport) – Redmond, Oregon
 * KRDR – Grand Forks Air Force Base – Grand Forks, North Dakota
 * KRDU (RDU) – Raleigh-Durham International Airport – Raleigh, North Carolina
 * KRED – Red Lodge Airport – Red Lodge, Montana
 * KREG – Louisiana Regional Airport – Gonzalez, Louisiana
 * KREI – Redlands Municipal Airport – Redlands, California
 * KREO – Rome State Airport – Rome, Oregon
 * KRFD (RFD) – Chicago Rockford International Airport – Rockford, Illinois
 * KRGK – Red Wing Regional Airport – Red Wing, Minnesota
 * KRHI (RHI) – Rhinelander-Oneida County Airport – Rhinelander, Wisconsin
 * KRHP – Western Carolina Regional Airport – Andrews, North Carolina
 * KRHV – Reid-Hillview Airport of Santa Clara County – San Jose, California
 * KRIC (RIC) – Richmond International Airport – Sandston, Virginia
 * KRID – Richmond Municipal Airport – Richmond, Indiana
 * KRIF – Richfield Municipal Airport – Richfield, Utah
 * KRIL (RIL) – Garfield County Regional Airport – Rifle, Colorado
 * KRIR – Flabob Airport – Riverside, California
 * KRIU – Rancho Murieta Airport – Rancho Murieta, California
 * KRIV – March Air Reserve Base – Riverside, California
 * KRIW (RIW) – Central Wyoming Regional Airport – Riverton, Wyoming
 * KRJD – Ridgely Airpark – Ridgely, Maryland
 * KRKR - Robert S. Kerr Airport - Poteau, Oklahoma
 * KRKD (RKD) – Knox County Regional Airport – Rockland, Maine
 * KRKS (RKS) – Southwest Wyoming Regional Airport – Rock Springs, Wyoming
 * KRLD – Richland Airport – Richland, Washington
 * KRME (RME) – Griffiss International Airport – Rome, New York
 * KRMN – Stafford Regional Airport – Stafford, Virginia
 * KRND – Randolph Air Force Base – San Antonio, Texas
 * KRNM – Ramona Airport – Ramona, California
 * KRNO (RNO) – Reno-Tahoe International Airport – Reno, Nevada
 * KRNT (RNT) – Renton Municipal Airport – Renton, Washington
 * KRNV – Cleveland Municipal Airport – Cleveland, Mississippi
 * KROA (ROA) – Roanoke-Blacksburg Regional Airport (Woodrum Field) – Roanoke, Virginia
 * KROC (ROC) – Greater Rochester International Airport – Rochester, New York
 * KROG – Rogers Executive Airport (Carter Field) – Rogers, Arkansas
 * KROW (ROW) – Roswell International Air Center – Roswell, New Mexico
 * KRPB – Belleville Municipal Airport – Belleville, Kansas
 * KRPD – Rice Lake Regional Airport (Carl's Field) – Rice Lake, Wisconsin
 * KRPH – Graham Municipal Airport – Graham, Texas
 * KRPX – Roundup Airport – Roundup, Montana
 * KRQE – Window Rock Airport – Window Rock, Arizona
 * KRRT (RRT) – Warroad International Memorial Airport (Swede Carlson Field) – Warroad, Minnesota
 * KRSL – Russell Municipal Airport – Russell, Kansas
 * KRST (RST) – Rochester International Airport – Rochester, Minnesota
 * KRSW (RSW) – Southwest Florida International Airport – Fort Myers, Florida
 * KRTN (RTN) – Raton Municipal Airport/Crews Field – Raton, New Mexico
 * KRTS - Reno Stead Airport - Reno, Nevada
 * KRUE – Russellville Regional Airport – Russellville, Arkansas
 * KRUG – Rugby Municipal Airport – Rugby, North Dakota
 * KRUQ (SRW) – Mid-Carolina Regional Airport – Salisbury, North Carolina
 * KRUT (RUT) – Rutland-Southern Vermont Regional Airport – Rutland, Vermont
 * KRVL – Mifflin County Airport – Reedsville, Pennsylvania
 * KRVS (RVS) – Richard Lloyd Jones Jr. Airport – Tulsa, Oklahoma
 * KRWI – Rocky Mount-Wilson Regional Airport – Rocky Mount, North Carolina
 * KRWL – Rawlins Municipal Airport – Rawlins, Wyoming
 * KRWV – Caldwell Municipal Airport – Caldwell, Texas
 * KRXE – Rexburg-Madison County Airport – Rexburg, Idaho
 * KRYN – Ryan Field – Tucson, Arizona
 * KRYV – Watertown Municipal Airport – Watertown, Wisconsin
 * KRYW – Lago Vista TX-Rusty Allen Airport – Lago Vista, Texas
 * KRYY – Cobb County International-McCollum Field Airport – Kennesaw, Georgia
 * KRZL – Jasper County Airport – Rensselaer, Indiana
 * KRZN – Burnett County Airport – Siren, Wisconsin
 * KRZT – Ross County Airport – Chillicothe, Ohio
 * KRZZ – Halifax County Airport – Roanoke Rapids, North Carolina

KS

 * KSAA – Shively Airport – Saratoga, Wyoming
 * KSAC – Sacramento Executive Airport – Sacramento, California
 * KSAD (SAD) – Safford Regional Airport – Safford, Arizona
 * KSAF (SAF) – Santa Fe Regional Airport – Santa Fe, New Mexico
 * KSAN (SAN) – San Diego International Airport (Lindbergh Field) – San Diego, California
 * KSAS – Salton Sea Airport – Salton City, California
 * KSAT (SAT) – San Antonio International Airport – San Antonio, Texas
 * KSAV (SAV) – Savannah/Hilton Head International Airport – Savannah, Georgia
 * KSAW (MQT) - Sawyer International Airport – Marquette, Michigan
 * KSAZ – Staples Municipal Airport – Staples, Minnesota
 * KSBA (SBA) – Santa Barbara Municipal Airport – Santa Barbara, California
 * KSBD (SBD) – San Bernardino International Airport – San Bernardino, California
 * KSBM (SBM) – Sheboygan County Memorial Airport – Sheboygan, Wisconsin
 * KSBN (SBN) – South Bend International Airport – South Bend, Indiana
 * KSBO – East Georgia Regional Airport – Swainsboro, Georgia
 * KSBP – San Luis Obispo County Regional Airport – San Luis Obispo, California
 * KSBS (SBS) – Steamboat Springs Airport (Bob Adams Field) – Steamboat Springs, Colorado
 * KSBX – Shelby Airport – Shelby, Montana
 * KSBY (SBY) – Salisbury-Ocean City Wicomico Regional Airport (SBY Regional Airport) – Salisbury, Maryland
 * KSCB – Scribner State Airport – Scribner, Nebraska
 * KSCD – Sylacauga Municipal Airport (Merkel Field) – Sylacauga, Alabama
 * KSCH – Schenectady County Airport – Schenectady, New York
 * KSCK (SCK) – Stockton Metropolitan Airport – Stockton, California
 * KSCR – Siler City Municipal Airport – Siler City, North Carolina
 * KSDC – Williamson-Sodus Airport – Williamson/Sodus, New York
 * KSDF (SDF) – Louisville International Airport – Louisville, Kentucky
 * KSDL (SCF) – Scottsdale Airport – Scottsdale, Arizona
 * KSDM – Brown Field Municipal Airport – San Diego, California
 * KSDY – Sidney-Richland Municipal Airport – Sidney, Montana
 * KSEA (SEA) – Seattle-Tacoma International Airport – Seattle, Washington
 * KSEE – Gillespie Field – San Diego, California
 * KSEF (SEF) – Sebring Regional Airport – Sebring, Florida
 * KSEG (SEG) – Penn Valley Airport – Selinsgrove, Pennsylvania
 * KSEM (SEM) – Craig Field – Selma, Alabama
 * KSEP – Stephenville Clark Regional Airport – Stephenville, Texas
 * KSEZ (SDX) – Sedona Airport – Sedona, Arizona
 * KSFB (SFB) – Orlando Sanford International Airport – Sanford, Florida
 * KSFD – Winner Regional Airport (Bob Wiley Field) – Winner, South Dakota
 * KSFF (SFF) – Felts Field – Spokane, Washington
 * KSFM – Sanford Seacoast Regional Airport – Sanford, Maine
 * KSFO (SFO) – San Francisco International Airport – San Francisco, California
 * KSFQ – Suffolk Executive Airport – Suffolk, Virginia
 * KSFZ – North Central State Airport – Pawtucket, Rhode Island
 * KSGF (SGF) – Springfield-Branson National Airport – Springfield, Missouri
 * KSGJ – Northeast Florida Regional Airport – St. Augustine, Florida
 * KSGT (SGT) – Stuttgart Municipal Airport – Stuttgart, Arkansas
 * KSGU – St. George Municipal Airport – St. George, Utah (closed 2011)
 * KSGU (SGU) – St. George Regional Airport – St. George, Utah
 * KSHD (SHD) – Shenandoah Valley Regional Airport – Staunton, Virginia
 * KSHN – Sanderson Field – Shelton, Washington
 * KSHR (SHR) – Sheridan County Airport – Sheridan, Wyoming
 * KSHV (SHV) – Shreveport Regional Airport – Shreveport, Louisiana
 * KSIF – Rockingham County NC Shiloh Airport – Stoneville, North Carolina
 * KSIK (SIK) – Sikeston Memorial Municipal Airport – Sikeston, Missouri
 * KSIY (SIY) – Siskiyou County Airport – Montague, California
 * KSJC (SJC) – Norman Y. Mineta San José International Airport – San Jose, California
 * KSJN (SJN) – St. Johns Industrial Air Park – St. Johns, Arizona
 * KSJT (SJT) – San Angelo Regional Airport (Mathis Field) – San Angelo, Texas
 * KSKA – Fairchild Air Force Base – Spokane, Washington
 * KSKF – Kelly Field Annex (formerly Kelly Air Force Base) – San Antonio, Texas
 * KSKI – Sac City Municipal Airport – Sac City, Iowa
 * KSKX – Taos Regional Airport – Taos, New Mexico
 * KSLB – Storm Lake Municipal Airport – Storm Lake, Iowa
 * KSLC (SLC) – Salt Lake City International Airport – Salt Lake City, Utah
 * KSLE (SLE) – McNary Field (Salem Municipal Airport) – Salem, Oregon
 * KSLG (SLG) – Smith Field – Siloam Springs, Arkansas
 * KSLI – Los Alamitos Army Airfield – Los Alamitos, California
 * KSLK (SLK) – Adirondack Regional Airport – Saranac Lake, New York
 * KSLN (SLN) – Salina Regional Airport – Salina, Kansas
 * KSLR – Sulphur Springs Municipal Airport – Sulphur Springs, Texas
 * KSMD (SMD) – Smith Field – Fort Wayne, Indiana
 * KSME – Lake Cumberland Regional Airport – Somerset, Kentucky
 * KSMF(SMF) – Sacramento International Airport – Sacramento, California
 * KSMN – Lemhi County Airport – Salmon, Idaho
 * KSMO (SMO) – Santa Monica Airport (Clover Field) – Santa Monica, California
 * KSMQ – Somerset Airport (George Walker Field) – Somerville, New Jersey
 * KSMS – Sumter Airport – Sumter, South Carolina
 * KSMX (SMX) – Santa Maria Public Airport (Capt. G. Allan Hancock Field) – Santa Maria, California
 * KSNA (SNA) – John Wayne Airport – Santa Ana, California
 * KSNC – Chester Airport – Chester, Connecticut
 * KSNK - Winston Field - Snyder, Texas
 * KSNL (SNL) – Shawnee Regional Airport – Shawnee, Oklahoma
 * KSNS (SNS) – Salinas Municipal Airport – Salinas, California
 * KSNT - Stanley Airport - Stanley, Idaho (airport is designated as 2U7 by FAA)
 * KSNY (SNY) – Sidney Municipal Airport (Lloyd W. Carr Field) – Sidney, Nebraska
 * KSOA (SOA) - Sonora Municipal Airport - Sonora, Texas
 * KSOP (SOP) – Moore County Airport (Pinehurst Regional Airport) – Whispering Pines, North Carolina
 * KSOW (SOW) – Show Low Regional Airport – Show Low, Arizona
 * KSPA (SPA) – Spartanburg Downtown Memorial Airport – Spartanburg, South Carolina
 * KSPB – Scappoose Industrial Airpark – Scappoose, Oregon
 * KSPD – Springfield Municipal Airport – Springfield, Colorado
 * KSPF – Black Hills Airport (Clyde Ice Field) – Spearfish, South Dakota
 * KSPG – Albert Whitted Airport – St. Petersburg, Florida
 * KSPH - Springhill Airport - Springhill, Louisiana
 * KSPI (SPI) - Abraham Lincoln Capital Airport - Springfield, Illinois
 * KSPS (SPS) – Wichita Falls Regional Airport / Sheppard Air Force Base – Wichita Falls, Texas
 * KSPW (SPW) – Spencer Municipal Airport (Northwest Iowa Regional Airport) – Spencer, Iowa
 * KSPX – Houston Gulf Airport – League City, Texas (closed 2002)
 * KSPZ - Silver Springs Airport - Silver Springs, Nevada
 * KSQL (SQL) – San Carlos Airport – San Carlos, California
 * KSRC – Searcy Municipal Airport – Searcy, Arkansas
 * KSRQ (SRQ) – Sarasota-Bradenton International Airport – Sarasota, Florida
 * KSRR (RUI) – Sierra Blanca Regional Airport – Ruidoso, New Mexico
 * KSSC – Shaw Air Force Base – Sumter, South Carolina
 * KSSF (SSF) – Stinson Municipal Airport – San Antonio, Texas
 * KSSI (SSI) – McKinnon St. Simons Island Airport – Brunswick, Georgia
 * KSSN – Seneca Army Airfield – Romulus, New York
 * KSSQ – Shell Lake Municipal Airport – Shell Lake, Wisconsin
 * KSTC – St. Cloud Regional Airport – St. Cloud, Minnesota
 * KSTF – George M. Bryan Airport – Starkville, Mississippi
 * KSTK – Sterling Municipal Airport – Sterling, Colorado
 * KSTL (STL) – St. Louis Lambert International Airport – St. Louis, Missouri
 * KSTP (STP) – St. Paul Downtown Airport (Holman Field) – St. Paul, Minnesota
 * KSTS (STS) – Charles M. Schulz-Sonoma County Airport – Santa Rosa, California
 * KSUA – Witham Field – Stuart, Florida
 * KSUN (SUN) – Friedman Memorial Airport – Hailey, Idaho
 * KSUS – Spirit of St. Louis Airport – St. Louis, Missouri
 * KSUT – Cape Fear Regional Jetport (Howie Franklin Field) – Oak Island, North Carolina
 * KSUU – Travis Air Force Base – Fairfield, California
 * KSUW – Richard I. Bong Airport – Superior, Wisconsin
 * KSUX (SUX) – Sioux Gateway Airport – Sioux City, Iowa
 * KSUZ – Saline County Regional Airport – Benton, Arkansas
 * KSVC (SVC) – Grant County Airport – Silver City, New Mexico
 * KSVE – Susanville Municipal Airport – Susanville, California
 * KSVH – Statesville Regional Airport – Statesville, North Carolina
 * KSWF (SWF) – Stewart International Airport – New Windsor, New York
 * KSWI – Sherman Municipal Airport – Sherman, Texas
 * KSWO (SWO) - Stillwater Regional Airport - Stillwater, Oklahoma
 * KSWT – Seward Municipal Airport – Seward, Nebraska
 * KSWW (SWW) – Avenger Field – Sweetwater, Texas
 * KSXL – Summersville Airport – Summersville, West Virginia
 * KSXT - Sexton Summit Weather Station - Grants Pass, Oregon (not an airport)
 * KSXU – Santa Rosa Route 66 Airport – Santa Rosa, New Mexico
 * KSYF – Cheyenne County Municipal Airport – St. Francis, Kansas
 * KSYI – Shelbyville Municipal Airport (Bomar Field) – Shelbyville, Tennessee
 * KSYL – Roberts Army Heliport – Camp Roberts, San Luis Obispo County, California
 * KSYN (SYN) – Stanton Airfield – Stanton, Minnesota
 * KSYR (SYR) – Syracuse Hancock International Airport – Syracuse, New York
 * KSZL – Whiteman Air Force Base – Johnson County, Missouri
 * KSZP – Santa Paula Airport – Santa Paula, California
 * KSZT – Sandpoint Airport (Dave Wall Field) – Sandpoint, Idaho

KT

 * KTAD – Perry Stokes Airport – Trinidad, Colorado
 * KTAN – Taunton Municipal Airport – Taunton, Massachusetts
 * KTBN (TBN) – Waynesville-St. Robert Regional Airport – Fort Leonard Wood, Missouri
 * KTBR (TBR) – Statesboro–Bulloch County Airport – Statesboro, Georgia
 * KTBX – Shoshoni Municipal Airport – Shoshoni, Wyoming
 * KTCC – Tucumcari Municipal Airport – Tucumcari, New Mexico
 * KTCL (TCL) – Tuscaloosa Regional Airport – Tuscaloosa, Alabama
 * KTCM – McChord Air Force Base – Tacoma, Washington
 * KTCS – Truth or Consequences Municipal Airport – Truth or Consequences, New Mexico
 * KTCY – Tracy Municipal Airport – Tracy, California
 * KTDF – Person County Airport – Roxboro, North Carolina
 * KTDO – Toledo-Winston Carlock Memorial Airport – Toledo, Washington
 * KTDW – Tradewind Airport – Amarillo, Texas
 * KTEB (TEB) – Teterboro Airport – Teterboro, New Jersey
 * KTEL – Perry County Municipal Airport – Tell City, Indiana
 * KTEX (TEX) – Telluride Regional Airport – Telluride, Colorado
 * KTGI – Tangier Island Airport – Tangier, Virginia
 * KTHM – Thompson Falls Airport – Thompson Falls, Montana
 * KTHP – Hot Springs County Municipal Airport – Thermopolis, Wyoming
 * KTHV (THV) – York Airport – York, Pennsylvania
 * KTIK – Tinker Air Force Base – Oklahoma City, Oklahoma
 * KTIW (TIW) – Tacoma Narrows Airport – Tacoma, Washington
 * KTIX (TIX) – Space Coast Regional Airport – Titusville, Florida
 * KTKI (TKI) – McKinney National Airport – McKinney, Texas
 * KTKO – Mankato Airport – Mankato, Kansas
 * KTKV (TKV) – Tomahawk Regional Airport – Tomahawk, Wisconsin
 * KTLH (TLH) – Tallahassee International Airport – Tallahassee, Florida
 * KTLR (TLR) – Mefford Airport – Tulare, California
 * KTMB (TMB) – Kendall-Tamiami Executive Airport – Miami, Florida
 * KTME – Houston Executive Airport – Waller County, Texas
 * KTMK (OTK) - Tillamook Airport - Tillamook, Oregon
 * KTNP (TNP) – Twentynine Palms Airport – Twentynine Palms, California
 * KTNT (TNT) – Dade-Collier Training and Transition Airport – Miami, Florida
 * KTNU – Newton Municipal Airport – Newton, Iowa
 * KTNX (XSD) – Tonopah Test Range Airport – Tonopah, Nevada
 * KTOA (TOA) – Zamperini Field – Torrance, California
 * KTOI (TOI) – Troy Municipal Airport – Troy, Alabama
 * KTOL (TOL) – Toledo Express Airport – Toledo, Ohio
 * KTOP – Billard Municipal Airport – Topeka, Kansas
 * KTOR – Torrington Municipal Airport – Torrington, Wyoming
 * KTPA (TPA) – Tampa International Airport – Tampa, Florida
 * KTPF (TPF) – Peter O. Knight Airport – Davis Island, Tampa, Florida
 * KTPH – Tonopah Airport – Tonopah, Nevada
 * KTPL (TPL) – Draughon-Miller Central Texas Regional Airport – Temple, Texas
 * KTQE – Tekamah Airport – Tekamah, Nebraska
 * KTQH - Tahlequah Municipal Airport - Tahlequah, Oklahoma
 * KTQK – Scott City Municipal Airport – Scott City, Nebraska
 * KTRI (TRI) – Tri-Cities Regional Airport – Blountville, Tennessee
 * KTRK (TKF) – Truckee Tahoe Airport – Truckee, California
 * KTRM (TRM) – Jacqueline Cochran Regional Airport – Thermal, California
 * KTRX – Trenton Municipal Airport – Trenton, Missouri
 * KTSP – Tehachapi Municipal Airport – Tehachapi, California
 * KTTA (TTA) – Raleigh Executive Jetport – Sanford, North Carolina
 * KTTD (TTD) – Portland-Troutdale Airport – Portland, Oregon
 * KTTF – Custer Airport – Monroe, Michigan
 * KTTN (TTN) – Trenton-Mercer Airport – Trenton, New Jersey
 * KTUL (TUL) – Tulsa International Airport – Tulsa, Oklahoma
 * KTUP (TUP) – Tupelo Regional Airport – Tupelo, Mississippi
 * KTUS (TUS) – Tucson International Airport – Tucson, Arizona
 * KTVC (TVC) – Cherry Capital Airport – Traverse City, Michigan
 * KTVF (TVF) – Thief River Falls Regional Airport – Thief River Falls, Minnesota
 * KTVL – Lake Tahoe Airport – South Lake Tahoe, California
 * KTVR (TVR) – Vicksburg – Tallulah Regional Airport – Tallulah, Louisiana
 * KTVY – Tooele Valley Airport (Bolinder Field) – Tooele, Utah
 * KTVZ - Tompkinsville Monroe County Airport - Tompkinsville, Kentucky
 * KTWF (TWF) – Magic Valley Regional Airport (Joslin Field) – Twin Falls, Idaho
 * KTWT – Sturgis Municipal Airport – Sturgis, Kentucky
 * KTXK (TXK) – Texarkana Regional Airport (Webb Field) – Texarkana, Arkansas
 * KTXW – Mid Valley Airport – Weslaco, Texas
 * KTYL (TYZ) – Taylor Airport – Taylor, Arizona
 * KTYQ – Indianapolis Executive Airport – Indianapolis, Indiana
 * KTYR (TYR) – Tyler Pounds Regional Airport – Tyler, Texas
 * KTYS (TYS) – McGhee Tyson Airport – Knoxville, Tennessee
 * KTZR – Bolton Field – Columbus, Ohio
 * KTZT – Belle Plaine Municipal Airport – Belle Plaine, Iowa

KU

 * KUAO – Aurora State Airport – Aurora, Oregon
 * KUBE – Cumberland Municipal Airport – Cumberland, Wisconsin
 * KUBS – Columbus-Lowndes County Airport – Columbus, Mississippi
 * KUCA – Oneida County Airport – Utica, New York
 * KUCP – New Castle Municipal Airport – New Castle, Pennsylvania
 * KUDD – Bermuda Dunes Airport – Palm Springs, California
 * KUDG – Darlington County Jetport – Darlington, South Carolina
 * KUES – Waukesha County Airport (Crites Field) – Waukesha, Wisconsin
 * KUGN – Waukegan National Airport – Waukegan, Illinois
 * KUIL – Quillayute Airport – Quillayute, Washington
 * KUIN – Quincy Regional Airport – Quincy, Illinois
 * KUKF – Wilkes County Airport – North Wilkesboro, North Carolina
 * KUKI – Ukiah Municipal Airport – Ukiah, California
 * KUKL – Coffey County Airport – Burlington, Kansas
 * KUKT – Quakertown Airport – Quakertown, Pennsylvania
 * KULS – Ulysses Airport – Ulysses, Kansas
 * KUMP – Indianapolis Metropolitan Airport – Fishers, Indiana
 * KUNI (ATO) – Gordon K. Bush Airport – Athens / Albany, Ohio
 * KUNU (UNU) – Dodge County Airport – Juneau, Wisconsin
 * KUNV (SCE) – University Park Airport – University Park, Pennsylvania
 * KUOS (UOS) – Franklin County Airport – Sewanee, Tennessee
 * KUOX (UOX) – University-Oxford Airport – Oxford, Mississippi
 * KUTA (UTM) – Tunica Municipal Airport – Tunica, Mississippi
 * KUTS (HTV) – Huntsville Municipal Airport – Huntsville, Texas
 * KUUU – Newport State Airport – Newport, Rhode Island
 * KUVA (UVA) – Garner Field – Uvalde, Texas
 * KUZA – Rock Hill/York County Airport (Bryant Field) – Rock Hill, South Carolina

KV

 * KVAY – South Jersey Regional Airport – Mount Holly, New Jersey
 * KVBG – Vandenberg Air Force Base – Lompoc, California
 * KVBT – Bentonville Municipal Airport – Bentonville, Arkansas
 * KVBW – Bridgewater Airport – Bridgewater, Virginia
 * KVCB – Nut Tree Airport – Vacaville, California
 * KVCT (VCT) – Victoria Regional Airport – Victoria, Texas
 * KVCV (VCV) – Southern California Logistics Airport – Victorville, California
 * KVDF – Tampa Executive Airport – Tampa, Florida
 * KVEL (VEL) – Vernal Regional Airport – Vernal, Utah
 * KVER – Jesse Viertel Memorial Airport – Boonville, Missouri
 * KVES – Darke County Airport – Versailles, Ohio
 * KVGT (VGT) – North Las Vegas Airport – Las Vegas, Nevada
 * KVIH (VIH) – Rolla National Airport – Rolla / Vichy, Missouri
 * KVIS (VIS) – Visalia Municipal Airport – Visalia, California
 * KVJI – Virginia Highlands Airport – Abingdon, Virginia
 * KVKS – Vicksburg Municipal Airport – Vicksburg, Mississippi
 * KVKX – Potomac Airfield – Friendly, Maryland
 * KVLD (VLD) – Valdosta Regional Airport – Valdosta, Georgia
 * KVLL – Oakland-Troy Airport – Troy, Michigan
 * KVMR – Davidson Airport – Vermillion, South Dakota
 * KVNC (VNC) – Venice Municipal Airport – Venice, Florida
 * KVNY (VNY) – Van Nuys Airport – Van Nuys, California
 * KVPS (VPS) – Destin-Fort Walton Beach Airport / Eglin Air Force Base – Valparaiso, Florida
 * KVPZ – Porter County Regional Airport – Valparaiso, Indiana
 * KVQQ (VQQ) – Cecil Airport – Jacksonville, Florida
 * KVRB (VRB) – Vero Beach Regional Airport – Vero Beach, Florida
 * KVSF (VSF) – Hartness State Airport – Springfield, Vermont
 * KVTA – Newark-Heath Airport – Newark, Ohio
 * KVTN – Miller Field – Valentine, Nebraska
 * KVUJ – Stanly County Airport – Albemarle, North Carolina
 * KVUO – Pearson Field – Vancouver, Washington
 * KVVS – Joseph A. Hardy Connellsville Airport – Connellsville, Pennsylvania
 * KVYS – Illinois Valley Regional Airport (Walter A. Duncan Field) – Peru, Illinois

KW

 * KWAL – Wallops Flight Facility – Wallops Island, Virginia
 * KWAY – Greene County Airport – Waynesburg, Pennsylvania
 * KWBW (WBW) – Wilkes-Barre Wyoming Valley Airport – Wilkes-Barre, Pennsylvania
 * KWDG (WDG) - Woodring Airport - Enid, Oklahoma
 * KWDR (WDR) - Barrow County Airport - Winder, Georgia
 * KWHP – Whiteman Airport – Los Angeles, California
 * KWJF (WJF) – General William J. Fox Airfield – Lancaster, California
 * KWLD (WLD) – Strother Field – Winfield, Kansas
 * KWLW (WLW) – Willows-Glenn County Airport – Willows, California
 * KWMC (WMC) – Winnemucca Municipal Airport – Winnemucca, Nevada
 * KWRB – Robins Air Force Base – Warner Robins, Georgia
 * KWRI – McGuire Air Force Base – Wrightstown, New Jersey
 * KWRL – Worland Municipal Airport – Worland, Wyoming
 * KWST (WST) – Westerly State Airport – Westerly, Rhode Island
 * KWVI (WVI) – Watsonville Municipal Airport – Watsonville, California
 * KWVL – Waterville Robert LaFleur Airport – Waterville, Maine
 * KWWD – Cape May Airport – Wildwood, New Jersey
 * KWWR (WWR) - West Woodward Airport - Woodward, Oklahoma
 * KWYS (WYS) – Yellowstone Airport – West Yellowstone, Montana

KX

 * KXBP – Bridgeport Municipal Airport – Bridgeport, Texas
 * KXFL – Flagler County Airport – Bunnell, Florida
 * KXLL – Allentown Queen City Municipal Airport – Allentown, Pennsylvania
 * KXMR – Cape Canaveral Space Force Station – Cocoa Beach, Florida
 * KXNA (XNA) – Northwest Arkansas Regional Airport – Highfill, Arkansas
 * KXNO – North Air Force Auxiliary Field – North, South Carolina
 * KXNX – Sumner County Regional Airport – Gallatin, Tennessee
 * KXTA (XTA) – Homey Airport – Groom Lake, Nevada
 * KXVG – Longville Municipal Airport – Longville, Minnesota
 * KXWA (XWA) - Williston Basin International Airport - Williston, North Dakota

KY

 * KYIP (YIP) – Willow Run Airport – Ypsilanti, Michigan
 * KYKM (YKM) – Yakima Air Terminal (McAllister Field) – Yakima, Washington
 * KYKN (YKN) – Chan Gurney Municipal Airport – Yankton, South Dakota
 * KYNG (YNG) – Youngstown-Warren Regional Airport – Youngstown / Warren, Ohio

KZ

 * KZEF – Elkin Municipal Airport – Elkin, North Carolina
 * KZER – Schuylkill County Airport (Joe Zerbey Field) – Pottsville, Pennsylvania
 * KZPH (ZPH) – Zephyrhills Municipal Airport – Zephyrhills, Florida
 * KZUN – Black Rock Airport – Zuni Pueblo, New Mexico (closed 2018)
 * KZZV (ZZV) – Zanesville Municipal Airport – Zanesville, Ohio