THE WORLD'S LARGEST AIRLINE COMPANIES Including merger-created mega-airlines. Based on the number of miles their passengers flew in 2010, according to AP calculations of International Air Transport Association data:.
1. United Continental
2. Delta Air Lines
3. American Airlines
4. Air France, KLM
5. Lufthansa, Swiss, Austrian
6. British Airways, Iberia
7. Southwest, AirTran
8. Emirates
9. China Southern Airlines
10. Qantas Airways
