| 1 | IQ | Augsburg Airways GmbH | ICAO: AUB, Callsign: Augsburg Air, IATA Prefix: 614, Ceased operations on 31 October 2013. Founded in 1980 as Interot Airways. | D | AVCODES |
| 2 | IQ | Interot Airways | ICAO: IRT, Callsign: Interot, IATA Prefix: 614, Name changed to Augsbury-Airways GmbH. Founded in 1980. | D | AVCODES |
| 3 | IQ | Caribbean Airways Ltd. | ICAO: IQQ, Callsign: Caribjet, Name changed from International Caribbean Airline | BDS | AVCODES |
| 4 | IQ | International Caribbean Airline | Name changed to Caribbean Airways Ltd. | BDS | AVCODES |
| 5 | IQ | Qazaq Air Joint Stock Company | ICAO: QAZ, Callsign: Samruk, | KZ | AVCODES |
| 6 | IQAA | IROQUOIS IRONWORKER INC | | | SCAC4 |
| 7 | IQAF | Iraqi Air Force | | IRQ | TRAFFIC |
| 8 | IQAO | INIGUEZ QUINONEZ, ARMANDO | | | SCAC4 |
| 9 | IQCK | INTELLIQUICK DELIVERY INC | | | SCAC4 |
| 10 | IQIX | Industria Quimica Del Istmo S.A. de C.V. | added 7/2000; 7/2000-7/2005 | | NAKINA |
| 11 | IQIX | Industria Quimica Del Istmo S.A. de C.V. | added 7/2000; 7/2000 | | NRHS |
| 12 | IQIX | INDUSTRIA QUIMICA DEL ISTMO SA DE CV | | | PWRC |
| 13 | IQIX | Industria Quimica Del letmo de CV | | | RSRV |
| 14 | IQLE | INTERNATIONAL EXPRESS | | | SCAC4 |
| 15 | IQP | Happy Landings (Flight Training) | Callsign: Iqra Pakistan, | PK | AVCODES |
| 16 | IQQ | Caribbean Airways Ltd. | Callsign: Caribjet, | BDS | AVCODES |
| 17 | IQQ | Caribbean Airways Ltd. | IATA: IQ, Callsign: Caribjet, Name changed from International Caribbean Airline | BDS | AVCODES |
| 18 | IQQ | Caribbean Airways | | | ICAO1 |
