| 1 | Z | SHOWA LINE, LTD. | | | PWRC |
| 2 | Z | 1m~25px | | | TRAFFIC |
| 3 | Z0 | Norse Atlantic UK Limited | ICAO: UBT, Callsign: Longboat, IATA Prefix: 536, Subsidiary of Norse Atlantic Airways AS. AOC grant 23 September 2022. | GB | AVCODES |
| 4 | Z1 | Airline Control Systems (Pty) Ltd | Computer Reservations Systems (CRS). | ZA | AVCODES |
| 5 | Z2 | Styrian Airways GmbH | ICAO: STY, Callsign: Styrian, IATA Prefix: 536, Designator Z2 recalled by IATA | A | AVCODES |
| 6 | Z2 | Bravo Air Congo Brazzaville | ICAO: BAO, | ZRE | AVCODES |
| 7 | Z2 | Zest Airways Inc. | ICAO: EZD, Callsign: Zest Airways, IATA Prefix: 457, Name changed from Asian Spirit. Name changed to AirAsia Zest. | RP | AVCODES |
| 8 | Z2 | Zest Airways Inc. t/a AirAsia Zest | ICAO: EZD, Callsign: Zest Airways, IATA Prefix: 457, Name changed to Philippines AirAsia inc. t/a AirAsia Philippines. Name changed from Zest Airways Inc. Name changed from Asian Spirit | RP | AVCODES |
| 9 | Z2 | Philippines AirAsia Inc. t/a AirAsia Philippines | ICAO: APG, Callsign: Cool Red, IATA Prefix: 457, Name changed from Zest Airways Inc. t/a AirAsia Zest. Merged with AirAsia, Inc. Philippines. Name changed from Zest Airways Inc. Name changed from Asian Spirit | RP | AVCODES |
| 10 | Z3 | Promech, Inc. | Designator Z3* reinstated by IATA | USA | AVCODES |
| 11 | Z3 | Avient Aviation (Pty) Limited | ICAO: SMJ, Callsign: Avavia, IATA Prefix: 757, Placed into administration on 05 April 2013. Founded 1993 | ZW | AVCODES |
| 12 | Z3 | AV Cargo Airlines Limited | ICAO: SMJ, Callsign: Avavia, Founded in 2013. Ceased operations during 2014. | ZW | AVCODES |
| 13 | Z3 | Bidzy Ta Hot Aana Native Corporation t/a Tanana Air Service | ICAO: TNR, Callsign: Tan Air, IATA Designator changed from 4E*. | USA | AVCODES |
| 14 | Z4 | Zircon Airways Benin, S.A. | ICAO: BZW, Callsign: Zircon, IATA Prefix: 573, Founded in 2001. Ceased operations in 2002. | DY | AVCODES |
| 15 | Z4 | Puma Linhas Aereas Ltda | ICAO: PLY, Callsign: Puma Brasil, Founded in 2002. Ceased operations on 16 August 2011. Name changed from Puma Air Linhas Aereas | BR | AVCODES |
| 16 | Z4 | Zoom Airlines, Inc. | ICAO: OOM, Callsign: Zoom, IATA Prefix: 389, Ceased Operations and filed for Bankruptcy protection on 28 August 2008. | CDN | AVCODES |
| 17 | Z4 | Zagros Air | ICAO: GZQ, IATA Prefix: 541, Name changed to Zagrosjet Airlines in Augsut 2013. Affiliate of Atlasjet Turkey | IRQ | AVCODES |
| 18 | Z4 | Zagrosjet Airlines | ICAO: GZQ, IATA Prefix: 541, Ceased operations during March 2018. Name changed to Zagros Air in August 2013. Affiliate of Atlasjet Turkey | IRQ | AVCODES |
| 19 | Z5 | GMG Airlines Ltd. | ICAO: GMG, Callsign: GMG, IATA Prefix: 009, Founded in 1997. Commenced operations on 06 April 1998. Ceased operations in 2012. | BD | AVCODES |
| 20 | Z5 | Global Africa Cargo | ICAO: GAA, Callsign: Global Africa, IATA Prefix: 204, | ZW | AVCODES |
| 21 | Z6 | Public JSC "Aviation Company " Dniproavia" | ICAO: UDN, Callsign: Dniepro, IATA Prefix: 181, Declared bankrupt in Novmber 2017.Desigantor Z6* recalled by IATA. Name changed from Dniproavia - Joint Stock Aviation Co. | UA | AVCODES |
| 22 | Z7 | Zimbabwe Express Airlines | ICAO: EZX, Callsign: Zim Express, IATA Prefix: 247, Designator Z7 recalled by IATA | ZW | AVCODES |
| 23 | Z7 | Aviation Development Company Plc | ICAO: ADK, Callsign: Adco, Name changed to ADC Airlines | WAN | AVCODES |
| 24 | Z7 | Avia Traffic Company LLC | ICAO: AVJ, Callsign: Atomic, IATA designator changed to YK | KS | AVCODES |
| 25 | Z7 | ADC Airlines | ICAO: ADK, Callsign: Adco, Designator Z7* reinstated by IATA. AOC revoked on 30 April 2007. Name changed from Aviation Development Company Plc | WAN | AVCODES |
| 26 | Z7 | Sahara Air Cargo Limited | ICAO: SFQ, IATA Prefix: 913, | EAT | AVCODES |
| 27 | Z7 | NU-Aero (Pvt) Ltd t/a Fly Africa Zimbabwe | ICAO: FZW, Operations commenced on 01 August 2014. | ZW | AVCODES |
| 28 | Z7 | Amaszonas Uruguay | ICAO: AUZ, Callsign: Uruguayo, Name changed to Amaszonas Uruguay d/b/a Cristalux SA | ROU | AVCODES |
| 29 | Z7 | Amaszonas Uruguay d/b/a Cristalux SA | ICAO: AUZ, Callsign: Uruguayo, Name changed from Amaszonas Uruguay. | ROU | AVCODES |
| 30 | Z7 | CAMEX Airlines LLC | ICAO: CMS, Callsign: Camex, IATA Prefix: 207, | GE | AVCODES |
| 31 | Z8 | Pulkovo Aviation Enterprise | ICAO: PLK, Callsign: Pulkovo, IATA Desigantor changed to FV. Name changed from Air Enterprise Pulkovo | RUS | AVCODES |
| 32 | Z8 | DHL de Guatemala, S.A. | ICAO: JOS, IATA designator changed to L3* | GCA | AVCODES |
| 33 | Z8 | Air Enterprise Pulkovo | ICAO: PLK, Callsign: Pulkovo, Name changed to Pulkovo Aviation Enterprise | RUS | AVCODES |
| 34 | Z8 | Mali Airways S.A. | ICAO: MTZ, Callsign: Mali Airways, | RMM | AVCODES |
| 35 | Z8 | Línea Aérea Amaszonas S.A. | ICAO: AZN, Callsign: Amazonas, Designator Z8* reinstated by IATA | BOL | AVCODES |
| 36 | Z9 | Aero Zambia | ICAO: RZL, Callsign: Aero Zambia, IATA Prefix: 509, Designator Z9 recalled by IATA | Z | AVCODES |
| 37 | Z9 | JSC "Bek Air" | ICAO: BEK, Callsign: Berkut, Commenced operations on 01 September 2011 . Ceased operations on 17 April 2020. Name changed from Berkut Air | KZ | AVCODES |
| 38 | Z9 | MYAirline Sdn. Bhd. | ICAO: MYM, Callsign: Myair, | MAL | AVCODES |
| 39 | ZA | Access Air, Inc. | ICAO: CYD, Callsign: Cyclone, Ceased operations on 27 February 2001. Operations to start again as Iowair 05/2000 | USA | AVCODES |
| 40 | ZA | ZAS Airlines Of Egypt | ICAO: ZAS, Callsign: ZAS Airlines, | ET | AVCODES |
| 41 | ZA | Genair Ltd. | | GB | AVCODES |
| 42 | ZA | Astair Limited Company | IATA Prefix: 433, Name changed to Interavia Airlines | RUS | AVCODES |
| 43 | ZA | Interavia Airlines | ICAO: SUW, Callsign: Astair, IATA Prefix: 433, Name changed from Astair | RUS | AVCODES |
| 44 | ZA | Skywings Asia Airlines | ICAO: SWM, Callsign: Sky Angkor, IATA Prefix: 969, Name changed to Sky Angkor Airlines w.e.f. 01 December 2014. | K | AVCODES |
| 45 | ZA | Sky Angkor Airlines Co., Ltd. d/b/a Sky Angkor Airlines | ICAO: SWM, Callsign: Sky Angkor, IATA Prefix: 969, Name changed from Skywings Asia Airlines w.e.f. 01 December 2014. | K | AVCODES |
| 46 | ZAAO | ZIMMERMAN TRUCKING | | | SCAC4 |
| 47 | ZABR | Zájazdy Bratislava | | SK | TRAFFIC |
| 48 | ZAC | Zambia Airways | IATA: QZ, Callsign: Zambia, | Z | AVCODES |
| 49 | ZACH | Zakłady Azotowe Chorzów S.A. | | PL | VKM |
| 50 | ZACO | ZARCO 66 INC | | | SCAC4 |
| 51 | ZACT | ZAC-TRANZ | | | SCAC4 |
| 52 | ZACX | Zaclon, Inc. | added 10/1988; 1/1994-7/2005; eliminated 10/2009 | | NAKINA |
| 53 | ZACX | Zaclon, Inc. | added 10/88; 1/94-7/2000 | | NRHS |
| 54 | ZACX | ZACLON, INC. | | | PWRC |
| 55 | ZACX | Zaclon | | | RSRV |
| 56 | ZACX | ZACLON INCORPORATED | | | SCAC4 |
| 57 | ZADE | ZADERAKA TRANSPORT INC | | | SCAC4 |
| 58 | ZADJ | ZADROZNY, J INC | | | SCAC4 |
| 59 | ZAF | Zuckerfabriken Aarberg und Frauenfeld AG | | CH | VKM |
| 60 | ZAFQ | ZAVECO LTD | | | SCAC4 |
| 61 | ZAFU | SAFTAINER | | | SCAC4 |
| 62 | ZAGAN | Miejski Zakład Komunikacyjny Sp. z o.o. w Żaganiu | City: Żagan | PL | TRAFFIC |
| 63 | ZAGI | AGRIPEN INDUST. CAROLINA CORN PROCESSOR | | | PWRC |
| 64 | ZAGR | AGRICO CHEMICAL CO. | | | PWRC |
| 65 | ZAGR | | City: Zagreb | HR | TRAFFIC |
| 66 | ZAGRO | ZAGRO Bahn- und Baumaschi | | DE | VKM |
| 67 | ZAHN | ZAHN, R D TRANSPORTATION COMPANY IN | | | SCAC4 |
| 68 | ZAI | Zaire Aero Service (ZAS) | Callsign: Zasair, | ZRE | AVCODES |
| 69 | ZAI | Zaire Aero Service (ZAS) | IATA: JZ, Callsign: Juliette Zulu, ICAO callsign changed to Zasair | ZAR | AVCODES |
| 70 | ZAI | Zaire Aero Service (ZAS) | IATA: JZ, Callsign: Zasair, ICAO callsign changed from Juliette Zulu | ZAR | AVCODES |
| 71 | ZAI | Zaire Aero Service | | | ICAO1 |
| 72 | ZAJAZD | Przewóz Osób "Zajazd" sp. z o.o. | City: Ruda Slaska | PL | TRAFFIC |
| 73 | ZAK | Zambia Skyways Ltd. | IATA: X7, Callsign: Easair, Designator X7 recalled by IATA, ICAO designator changed from EAZ. Formerly Eastern Air Ltd. / IATA code changed from X7* | Z | AVCODES |
| 74 | ZAK | Zambia Skyways Ltd. | Callsign: Easair, Designator X7 recalled by IATA, ICAO designator changed from EAZ. Formerly Eastern Air Ltd. / IATA code changed from X7* | Z | AVCODES |
| 75 | ZAK | Airlink Zambia | IATA: K8 | | ICAO1 |
| 76 | ZAK | | City: Zakopane | PL | TRAFFIC |
| 77 | ZAKI | Z AND K LEASING INCORPORATED | | | SCAC4 |
| 78 | ZAKR | ZAKRON INDUSTRIES INC | | | SCAC4 |
| 79 | ZALA | Zala Volán | | H | TRAFFIC |
| 80 | ZAMA | U.S. Army Camp Zama | | J | TRAFFIC |
| 81 | ZAMC | Z A M TRANSPORTATION COMPANY INC | | | SCAC4 |
| 82 | ZAMO | ZAMORA TRUCKING | | | SCAC4 |
| 83 | ZAMR | ZAMORA FREIGHT MANAGEMENT LLC | | | SCAC4 |
| 84 | ZAMT | Z AUTOMOTRIZ Y AUTOTRANSPORTE S A D | | | SCAC4 |
| 85 | ZAN | Zantop International Airlines, Inc. | Callsign: Zantop, | USA | AVCODES |
| 86 | ZAN | Zantop International Airlines | | | ICAO1 |
| 87 | ZANT | ZANTINGH SWINE INC | | | SCAC4 |
| 88 | ZANU | ZANZIBAR SHIPPING LINES LIMITED | | EAT | BIC |
| 89 | ZAPN | ZAPIEN TRUCKING | | | SCAC4 |
| 90 | ZAPPA | Zappa Benedetto srl | | I | TRAFFIC |
| 91 | ZAPS | ZAPS TRUCKING INC | | | SCAC4 |
| 92 | ZAPU | GRUPA ZAKLADY AZOTOWE PULAWY SA | | PL | BIC |
| 93 | ZAPU | ZAKLADY AZOTOWA PULAWY SA | | | SCAC4 |
| 94 | ZAPUL | Zakłady Azotowe PUŁAWY S.A. | | PL | VKM |
| 95 | ZAR | Zairean Airlines | IATA: VZ, Callsign: Zairean, Ceased operations. | ZRE | AVCODES |
| 96 | ZAR | Zairean Airlines | | | ICAO1 |
| 97 | ZARL | ZARTRAN LLC | | | SCAC4 |
| 98 | ZARN | ZARNS OIL INC | | | SCAC4 |
| 99 | ZART | ZARO TRANSPORTATION LLC | | | SCAC4 |
| 100 | ZAS | ZAS Airlines Of Egypt | IATA: ZA, Callsign: ZAS Airlines, | ET | AVCODES |
