| 1 | 3Z | Necon Air Ltd. | ICAO: NEC, Callsign: Necon Air, IATA Prefix: 741, Designator 3Z reinstated by IATA. Established 14 September 1992. Suspended flights in 2003 due to financial difficulties. | NEP | AVCODES |
| 2 | 3Z | Tatonduk Outfitters Ltd. d/b/a Everts Air | ICAO: VTS, Callsign: Everts, IATA Desigantor changed from 3K. Name changed from Tatonduk Outfitters Ltd. d/b/a Everts Air Alaska / Everts Air Cargo. Name changed from Tatonduk Outfitters Ltd. d/b/a Air Cargo Express | USA | AVCODES |
| 3 | 3Z | Zoom Airways Limited | ICAO: XAW, | BD | AVCODES |
| 4 | 3Z | Travel Service Polska Sp. z.o.o | ICAO: TVP, Callsign: Jet Travel, Name changed to Smartwings Polska Sp. z.o.o. w.e.f. 10 December 2018. | PL | AVCODES |
| 5 | 3Z | Smartwings Polska Sp. z.o.o. | ICAO: TVP, Callsign: Jet Travel, Name changed from Travel Service Polska Sp. z.o.o. w.e.f. 10 December 2018. | PL | AVCODES |
