U.S. Airlines by 2006 Operating Revenues

For statistical purposes, ATA defines "U.S. Airlines" as those carriers required by the U.S. Department of Transportation (DOT) to comply with Form 41 Financial and Traffic Reporting Requirements.

More than $1 Billion

1. ABX Air
2. AirTran Airways
3. Alaska Airlines 
4. American Airlines
5. American Eagle Airlines
6. Atlantic Southeast Airlines
7. Atlas Air/Polar Air Cargo
8. Comair
9. Continental Airlines
10. Delta Air Lines
11. FedEx Express
12. Frontier Airlines
13. JetBlue Airways
14. Mesa Airlines
15. Northwest Airlines
16. SkyWest
17. Southwest Airlines
18. United Airlines
19. UPS Airlines
20. US Airways

$100 Million to $1 Billion

1. Air Transport International
2. Air Wisconsin Airlines
3. Allegiant Air
4. Aloha Airlines
5. Amerijet International
6. ASTAR Air Cargo
7. ATA Airlines
8. Champion Air
9. Continental Micronesia
10. Evergreen International 
11. Executive Airlines
12. ExpressJet Airlines
13. Florida West Airlines
14. Gemini Air Cargo
15. GoJet Airlines
16. Hawaiian Airlines
17. Horizon Air
18. Kalitta Air
19. Mesaba Airlines
20. Midwest Airlines
21. North American Airlines
22. Omni Air International
23. Pinnacle Airlines
24. PSA Airlines
25. Ryan International Airlines
26. Southern Air
27. Spirit Airlines
28. Sun Country Airlines
29. Trans States Airlines
30. USA 3000 Airlines
31. USA Jet Airlines 
32. World Airways

Less Than $100 million

1. 40-Mile Air
2. Aerodynamics
3. Air Midwest
4. Alaska Central Express
5. Alaska Seaplane Service
6. Ameristar Air Cargo
7. Arctic Circle Air Service
8. Arctic Transportation 
9. Arrow Air
10. Asia Pacific Airlines
11. Bemidji Airlines
12. Bering Air
13. Big Sky Airlines
14. Boston-Maine Airways
15. Cape Air
16. Capital Cargo International
17. Cargo 360
18. Caribbean Sun Airlines
19. Centurion Air Cargo
20. Chautauqua Airlines
21. Colgan Air
22. CommutAir
23. Ellis Air Taxi
24. Empire Airlines
25. ERA Aviation
26. Everts Air
27. Express.Net Airlines
28. Falcon Air Express
29. Focus Air
30. Freedom Air
31. Freedom Airlines
32. Frontier Flying Service
33. Grand Canyon Helicopters
34. Grant Aviation
35. Great Lakes Airlines
36. Gulf & Caribbean Air
37. Gulf Stream International Airlines
38. Hageland Aviation Services
39. Harris Air Services
40. Homer Air
41. Iliamna Air Taxi
42. Inland Aviation Services
43. Island Air 
44. Katmai Air
45. Kenmore Air
46. Kitty Hawk Air Cargo
47. L.A.B. Flying Service
48. Lynden Air Cargo
49. M&N Aviation
50. MAXjet Airways
51. Miami Air International
52. NetJets
53. New England Airlines
54. Northern Air Cargo
55. Pace Airlines
56. Pacific Airways
57. Pacific Wings Airlines
58. PenAir
59. Piedmont Airlines
60. Primaris Airlines
61. Promech Air
62. RegionsAir
63. Republic Airlines
64. Salmon Air
65. Scenic Airlines
66. Seaborne Airlines
67. Servant Air
68. Shuttle America
69. Sierra Pacific Airlines
70. Skagway Air 
71. Sky King Airlines
72. Skyway Airlines
73. Smokey Bay Air
74. Spernak Airways
75. Tanana Air Service
76. Taquan Air
77. Tradewind Aviation
78. Tradewinds Airlines
79. US Helicopter
80. Victory Air Transport
81. Viegues Air Link
82. Vintage Props & Jets
83. Warbelow's Air Ventures
84. Ward Air
85. West Isle Air
86. Wings of Alaska 
87. Wright Air Service
88. Xtra Airways
89. Yute Air Alaska