Airlines — M
- MNHMonarch Airlines
- MFCMoncton Flying Club
- MDBMonde Air Charters
- MTIMonerrey Air Taxi
- ZTFMongolian International Air Lines
- MKYMonky Aerotaxis
- MGXMontenegro Airlines
- MNTMontserrat Airways
- MNYMooney Aircraft Corporation
- MALMorningstar Air Express
- MSSMorris Air Service
- MROMorrison Flying Service
- GAIMoskovia Airlines
- MPIMosphil Aero
- MSIMotor Sich
- NZMMount Cook Airlines
- MTNMountain Air Cargo
- MTCMountain Air Company
- PKPMountain Air Express
- BRRMountain Air Service
- MBIMountain Bird
- MHAMountain High Aviation
- MPCMountain Pacific Air
- MTVMountain Valley Air Service
- MOWMowhawk Airlines
- EBFMSR Flug-Charter
- MCVMTC Aviacion
- MDNMudan Airlines
- CMJMudanjiang General Aviation
- MTXMulti Taxi
- WBRMulti-Aero
- MFTMultiflight
- MNZMurmansk Aircompany
- MUAMurray Air
- MMRMusrata Air Transport
- MAWMustique Airways
- UBAMyanma Airways
- MMMMyanmar Airways International
- MYAMyflug
- VKGMytravel Airways