FL

FL or variations may refer to:

Businesses and organizations

 * FL, IATA code of Fly Lili, a Romanian airline
 * FL, then-IATA code of AirTran Airways, a former American airline
 * FL Group, an Icelandic investment company
 * Foot Locker (ticker symbol), retailer

Numismatics

 * Florin (disambiguation), various coins
 * Guilder, various coins also sometimes called "florin"

Places

 * Florida, US postal abbreviation

Biology and medicine

 * FLT3LG (Fms-related tyrosine kinase 3 ligand), a protein
 * Fluffy transcription factor, gene of Neurospora crassa
 * Fluorouracil (5-FU), and leucovorin (folinic acid), a chemotherapy regimen
 * Follicular lymphoma in medicine
 * Frontal lobe, the largest brain lobe

Mathematics and computing

 * FL (complexity), a class of functions
 * FL (programming language)
 * FL Studio, music production software

Other uses in science and technology

 * Femtolitre, a unit of volume
 * Flerovium, symbol Fl, a chemical element
 * Flight level, of an aircraft
 * "Fluid", as in fluid ounce (fl oz)
 * Foot-lambert, a unit of luminance
 * Friedmann–Lemaître metric in cosmology

Sport

 * Federal League, a 1914–1915 US baseball league
 * English Football League

Genealogy

 * Floruit (abbreviated fl.), a date when someone was active

Other uses

 * ﬂ, a typographical ligature
 * Flavius, a family or personal name in ancient Rome
 * Flawless, a grade of diamond clarity
 * Fork length, a standard fish measurement
 * Free List (Liechtenstein), a political party
 * Volvo FL, a truck
 * Front Left speaker in 5.1 surround sound