| 1 | MUI | Trans Air | IATA: P6, Callsign: Maui, IATA Prefix: 356, Designator P6 recalled by IATA | USA | AVCODES |
| 2 | MUI | Trans Executive Airlines of Hawaii t/a transair Express | IATA: 5H, Callsign: Maui, Operates transair Express SD360 Fleet. Designator 5H recalled by IATA | USA | AVCODES |
| 3 | MUI | Trans Executive Airlines of Hawaii t/a transair Express | IATA: R9, Callsign: Maui, Operates transair Express SD360 Fleet. ICAO callsign changed to Transair. Designator 5H recalled by IATA | USA | AVCODES |
| 4 | MUI | Trans Air | Callsign: Maui, Designator P6 recalled by IATA | USA | AVCODES |
| 5 | MUI | Trans Executive Airlines of Hawaii t/a transair Express | IATA: R9, Callsign: Transair, Operates transair Express SD360 Fleet. ICAO callsign changed from Maui. Designator 5H recalled by IATA | USA | AVCODES |
| 6 | MUI | Trans Air | | | ICAO1 |
| 7 | MUII | M C U INTERMODAL INC | | | SCAC4 |
| 8 | MUIK | MITSUI-SOKO CO LTD | | | SCAC4 |
| 9 | MUIR | MUIRS CARTAGE LIMITED | | | SCAC4 |
