Mackey International Airlines (2nd)
Magic Carpet Air Travel Club
Mahalo Air
Majestic Air (Majestic Airlines)
Majestic Airlines (Utah)
Makani Kai Air
Marco Island Airways (Marco Airways)
Marianas Southern Airways
Mario's Air
MarkAir
MarkAir Express
Martinaire Aviation
Maui Airlines
Maverick Airways (2nd)
Maverick International
MAX - Mountain Air Express (1st)
Maxjet Airways
McClain Airlines
McCulloch International Airlines
Mercer Airlines
Meregrass Air Charter
Mesa Airlines
Mesaba Airlines
Methow Aviation
Metro Airlines
Metro International Airways
MetroJet (US Airways)
MGM Grand Air
Miami Air International
Miami Air Lease
Miami Airline
Mid-South Airlines
Mid America Airlines (1st)
Midcontinent Airlines (5th)
Mid Pacific Air
Midstate Airlines (2nd)
Midway Airlines (1st)
Midway Airlines (2nd)
Midway Express
Midwest Airlines (USA) (1st)
Midwest Airlines (USA) (Republic Airlines 2nd)
Midwest Connect (Chautauqua Airlines)
Midwest Connect (Republic Airlines 2nd)
Midwest Connect (Skyway Airlines)
Midwest Connect (SkyWest Airlines)
Midwest Express Airlines
Millon Air
Missionair
