| 1 | Q4 | Qatar Amiri Flight | ICAO: QAF, Callsign: Amiri, Designator Q4* recalled by IATA. | Q | AVCODES |
| 2 | Q4 | Steffen Air Charter Services d/b/a Swazi Express Airways | ICAO: SWX, Callsign: Swazi Express, Ceased operations on 04 April 2008. | SD | AVCODES |
| 3 | Q4 | Master Top Linhas Aereas Ltda | ICAO: MST, Designator Q4* recalled by IATA | BR | AVCODES |
| 4 | Q4 | Starlink Aviation Inc. | ICAO: TLK, Callsign: Starlink, Designator Q4 recalled by IATA | CDN | AVCODES |
| 5 | Q4 | euroairlines, S.L. | ICAO: ELE, Callsign: Euroline, IATA Prefix: 291, | E | AVCODES |
