| 1 | ZY | Ada Air | ICAO: ADE, Callsign: Ada Air, IATA Prefix: 121, Founded in 1991. Ceased operations in 2007. Desigantor ZY recalled by IATA | AL | AVCODES |
| 2 | ZY | Eznis Airways | ICAO: EZA, Callsign: Eznis, IATA Prefix: 646, IATA designator changed to O7 | MGL | AVCODES |
| 3 | ZY | Sik-Ay Hava Tasimacilik A.S. | ICAO: SHY, Callsign: Sky Power, Filed for bankruptcy and ceased all flight operations on 04 June 2013. ICAO callsign changed from Antalya Bird | TR | AVCODES |
| 4 | ZY | China Air Cargo Co., Ltd. | ICAO: CHY, Callsign: China Cargo, IATA Prefix: 662, Formerly AVIC Cargo Airlines. Planned startup with 1 x B757F. Joint-venture between JoyAir Holdings (45%), Guangzhou Donlinks Group Co.(35%) and Beijing Fidelity Asset Management Co. (20%). | PRC | AVCODES |
| 5 | ZYGI | ZEN YARN GARDEN INC | | | SCAC4 |
| 6 | ZYML | ZEYCAN MARITIME LTD | | | SCAC4 |
| 7 | ZYMU | ZIJDERHAND MOERKAPELLE BV | | NL | BIC |
