Leading airlines in the U.S. by domestic market share 2023-2024

During this time period, American Airlines was the leading airline in the U.S., with a domestic market share of 17.5 percent, closely followed by Delta Airlines, which had a 17.3 percent market share.

U.S. airlines' domestic market share

The passenger air transportation market is a thriving industry, taking individuals to locations around the globe. American Airlines was the second largest airline in the North America based on operating revenue, reaching nearly 50 billion U.S. dollars in 2022. Passenger airlines can face much scrutiny for their passenger satisfaction and comfort. A 2022 North American Airline Satisfaction Study by J.D. Power & Associates listed Southwest Airlines as the best long-haul, closely followed by low-cost carrier JetBlue Airways.

United Airlines, Delta Air Lines, American Airlines and Southwest Airlines are the top ranked airlines based on 2022 domestic market share. Delta operates out of Atlanta, and Hartsfield-Jackson Atlanta International Airport, Delta’s hub, sees the most passenger traffic in the United States. Chicago-headquartered United Airlines is a subsidiary of United Continental Holdings. United has flights to 210 domestic destinations and 120 destinations internationally, the Denver International Airport in Colorado being its largest passenger hub with over 8.4 million passengers in 2021.