| 1 | 4P | Pacific East Asia Cargo Airlines, Inc. | ICAO: PEC, Callsign: Pac-East Cargo, Founded on 09 October 1990. | RP | AVCODES |
| 2 | 4P | Business Aviation | Designator 4P* recalled by IATA. Reinstated by IATA | ZRE | AVCODES |
| 3 | 4P | Transportes Aereos del Peru S.A. d/b/a Transperu S.A. | Designator 4P recalled by IATA | PE | AVCODES |
| 4 | 4P | Viking Airlines AB | ICAO: VIK, Callsign: Swedjet, IATA Prefix: 078, Founded in 2003. Commenced operations on 05 May 2003. Ceased operations on 18 October 2010. | S | AVCODES |
| 5 | 4P | Travel Air Limited | | PNG | AVCODES |
| 6 | 4P | Public Charters, Inc. d/b/a REGIONAL Sky | IATA designator changed from P1. Name changed from Aviation Technologies Inc. d/b/a PublicCharters.com | USA | AVCODES |
