The 10 Largest U.S. Airlines by Market Share

What We’re Showing

This infographic highlights the largest U.S. airlines by market share, based on revenue passenger miles (RPMs)—calculated by multiplying the number of paying passengers by the distance traveled. 

The data comes from the Bureau of Transportation Statistics and covers the 12 months ended November 2024.

Key Takeaways

• Delta Air Lines leads the U.S. airline market with a 17.8% share and revenues of over $60 billion in 2024.  
• The big four airlines—Delta, American, Southwest, and United—account for nearly 70% of all revenue passenger miles.
• Southwest is the largest low-cost carrier, followed by Spirit, JetBlue, and Frontier. 
• Of the 58 airlines in the United States, the top 10 largest carriers comprise over 90% of the market.