Major airlines of the United States

The United States Department of Transportation defines a major carrier or major airline carrier as a U.S.-based airline that posts more than $1 billion in revenue during a fiscal year, grouped accordingly as "Group III".

Airlines
According to FY2023 revenues, 20 major carriers meet the requirement for Group III status.

Mainline passenger

 * Alaska Airlines
 * Allegiant Air
 * American Airlines*
 * Delta Air Lines*
 * Frontier Airlines
 * Hawaiian Airlines
 * JetBlue
 * Southwest Airlines*
 * Spirit Airlines
 * Sun Country Airlines
 * United Airlines*

(*) - considered one of the "Big 4" major U.S. national airlines

Regional passenger

 * Envoy Air (subsidiary of American Airlines Group)
 * Republic Airways
 * SkyWest Airlines

Freight

 * Atlas Air
 * FedEx Express
 * Kalitta Air
 * Polar Air Cargo (subsidiary of Atlas Air Worldwide Holdings)
 * UPS Airlines
 * USA Jet Airlines