| 1 | 4R | CJSC Royal Flight Airlines | {ICAO: ABG, Callsign: Royal Flight, IATA Designator changed to RL. Name changed from Joint Stock Company "Abakan-Avia" w.e.f. 11 July 2014.};SRCKEY=AVCODES | RUS | |
| 2 | 4R | Joint Stock Company "Abakan-Avia" | ICAO: ABG, Callsign: Abakan-Avia, Name changed to CJSC Royal Flight Airlines w.e.f. 11 July 2014. | RUS | AVCODES |
| 3 | 4R | Hamburg International Luftverkehirsgesellschaft mbH | ICAO: HHI, Callsign: Hamburg Jet, Ceased operations on 20 October 2010 and filed for Bankruptcy | D | AVCODES |
| 4 | 4R | Orient Eagle Airways | ICAO: OEG, Callsign: Orienteagle, Ceased operations | KZ | AVCODES |
| 5 | 4R | Northern Thunderbird Air Ltd. d/b/a N.T. Air | ICAO: NTA, Callsign: Thunderbird, Designator 4R recalled by IATA | CDN | AVCODES |
| 6 | 4R | Renfe Viajeros | IATA Designator changed to 4R. Railway Service | E | AVCODES |
| 7 | 4R | Star East Airline s.r.l. | ICAO: SEK, Callsign: East Rider, | RO | AVCODES |
| 8 | 4R | Renfe Viajeros Sociedad Mercantil Estatal SA | IATA Designator changed from 4R*. Railway Service | E | AVCODES |
