| 1 | MGX | Montenegro Airlines | IATA: YM, Callsign: Montair, IATA Prefix: 409, IATA designator changed from 1I | YU | AVCODES |
| 2 | MGX | Montenegro Airlines | IATA: 1I, Callsign: Montair, IATA designator changed to YM | YU | AVCODES |
| 3 | MGX | Montenegro Airlines | IATA: YM, Callsign: Montair, IATA Prefix: 409, IATA designator changed from 1I | SCG | AVCODES |
| 4 | MGX | Montenegro Airlines | IATA: YM, Callsign: Montair, IATA Prefix: 409, Ceased operations in 25 December 2020. IATA designator changed from 1I | CG | AVCODES |
| 5 | MGX | Montenegro Airlines | IATA: YM | | ICAO1 |
| 6 | MGXA | MANGES TRANSPORTATION LLC | | | SCAC4 |
| 7 | MGXB | MAGELLAN TRANSPORT LOGISTICS INC | | | SCAC4 |
| 8 | MGXC | MARTIN CARTAGE & EXPRESS INC | | | SCAC4 |
| 9 | MGXD | MCGUIRE TRANSPORT LTD | | | SCAC4 |
| 10 | MGXE | MUSTANG EXPRESS | | | SCAC4 |
| 11 | MGXF | M & G TRANSPORT | | | SCAC4 |
| 12 | MGXH | MARGARETTA EXPRESS INC | | | SCAC4 |
| 13 | MGXI | MEGATRUX INC | | | SCAC4 |
| 14 | MGXL | M AND G TRANSPORT LLC | | | SCAC4 |
| 15 | MGXM | MOONLIGHT TRANSFER INC | | | SCAC4 |
| 16 | MGXN | MORGAN EXPRESS INC | | | SCAC4 |
| 17 | MGXO | MTG TRANSPORTATION CORP | | | SCAC4 |
| 18 | MGXP | MG EXPRESS | | | SCAC4 |
| 19 | MGXQ | MTG LOGISTICS INC | | | SCAC4 |
| 20 | MGXR | MATSON INTEGRATED LOGISTICS (RAILCA | | | SCAC4 |
| 21 | MGXT | MG TRANSPORTES | | | SCAC4 |
| 22 | MGXV | MEGA TRANSPORTATION SERVICES LLC | | | SCAC4 |
