Major airlines of the United States
Airlines with more than $1 billion in yearly revenue
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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 operating revenue during a fiscal year, grouped accordingly as "Group III".[1]

Airlines
The Bureau of Transportation Statistics updates the listing of major airlines once per year. According to FY2025 operating revenues, 19 carriers meet the requirement for Group III status:[2]
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[3]
Regional passenger
- Envoy Air (subsidiary of American Airlines Group)
- PSA Airlines (subsidiary of American Airlines Group)
- Republic Airways
- SkyWest Airlines