| 1 | KHM | Cambodia Airlines Co. Ltd. | IATA: Y6, Callsign: Cambodia Airlines, IATA designator changed to DI. Designator Y6* reinstated by IATA | K | AVCODES |
| 2 | KHM | Cambodia Airlines Co. Ltd. | IATA: DI, Callsign: Cambodia Airlines, IATA designator changed from Y6*. Designator Y6* reinstated by IATA | K | AVCODES |
| 3 | KHM | Cambodia Airlines | | | ICAO1 |
| 4 | KHMAF | Khmer Air Force | ទ័ពអាកាសខ្មែរ, French: Armée de l'air khmère, 1970 - 1975 | KHM | TRAFFIC |
| 5 | KHMC | KELLY, H M, INC | | | SCAC3 |
| 6 | KHMC | KELLY, H M, INC | | | SCAC4 |
| 7 | KHMO | KEHM OIL COMPANY | | | SCAC4 |
| 8 | KHMQ | KOHLS MOTOR TRANSFER COMPANY | | | SCAC3 |
| 9 | KHMS | KAHN MOTOR SERVICE | | | SCAC3 |
| 10 | KHMS | KHM SPEEDY TRANSPORT INC | | | SCAC4 |
