- Delta Air Lines, Inc.738
- Northwest Orient Airlines300
- Northwest Airlines289
- Delta Air Corporation63
- Western Air Lines, Inc.45
- Northeast Airlines32
- Southern Airways, Inc.29
- North Central Airlines, Inc.27
- Pacific Northern Airlines, Inc.20
- Chicago and Southern Air Lines14
- Western Air Express Corporation12
- Republic Airlines9
- Southwest Airways, Inc.9
- Pacific Air Lines, Inc.7
- Bonanza Air Lines, Inc.5
- Hughes Air Corp.5
- Wisconsin Central Airlines, Inc.5
- Delta Air Service3
- Western Air Express, Inc.3
- Eastern Air Lines, Inc.2
