Mackey International Airlines (2nd)
Magic Carpet Air Travel Club
Mahalo Air
Majestic Air (Majestic Airlines)
Makani Kai Air
Marco Island Airways (Marco Airways)
MarkAir
MarkAir Express
Maui Airlines
Maverick Airways (2nd)
MAX - Mountain Air Express (1st)
Maxjet Airways
McClain Airlines
McCulloch International Airlines
Mercer Airlines
Mesa Airlines
Mesaba Airlines
Metro Airlines
Metro International Airways
MetroJet (US Airways)
MGM Grand Air
Miami Air International
Miami Air Lease
Miami Airline
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
Modern Air Transport
Mohawk Airlines (1st)
Mokulele Airlines
Mokulele Airlines (Shuttle America)
Mountainwest Aviation
MPA-Michigan Peninsula Airways
Murray Air
Muse Air
Music City Airways
MVA-Mississippi Valley Airlines
