Airlines
| Airline | IATA | ICAO | Country |
|---|---|---|---|
| Wizz Air UK | W9 | WUK | United Kingdom |
| Wondair | – | WNR | Spain |
| Woodgate Aviation | – | CWY | United Kingdom |
| World Atlantic Airlines | K8 | WAL | United States |
| World Cargo Airlines | 3G | GSB | Malaysia |
| World Experience Airline | W1 | – | Canada |
| World Scale Airlines | W3 | WSS | United States |
| World2Fly | 2W | WFL | Spain |
| Wright Air Service | 8V | WRF | United States |
| XAIR USA | XA | XAU | United States |
| Xinjiang General Aviation | – | XTH | China |
XOJET
|
– | XOJ | United States |
| XPTO | XP | XPT | Portugal |
| Yamal Airlines | YC | LLM | Russian Federation |
Yanair
|
YE | ANR | Ukraine |
| Yangon Airways Ltd. | YH | – | Myanmar |
| Yas Air | – | MND | Islamic Republic of Iran |
| Yellowstone Club Private Shuttle | Y1 | – | United States |
| Yellowtail | YE | YEL | United States |
| Yemenia | IY | IYE | Yemen |
| YES Airways | – | YEP | Poland |
| Yeti Airlines | YT | NYT | Nepal |
| Ying'an Airlines | YI | AYE | China |
| YTO Cargo Airlines | YG | HYT | China |
| Yunnan Airlines | 3Q | CYH | China |
| Yute Commuter Service | K2 | TUD | United States |
| Yuzhmashavia | 2N | UMK | Ukraine |
| Z Air | 7Z | EZR | – |
| ZABAIKAL AIRLINES | Z6 | ZTT | Russian Federation |
| Zabaykalskii Airlines | ZP | ZZZ | Russian Federation |
| Zagros Airlines | ZO | IZG | Islamic Republic of Iran |
| Zagrosjet | Z4 | GZQ | Iraq |
| Zambezi Airlines (ZMA) | ZJ | – | Zambia |
| Zambia Airways | ZN | AZB | Zambia |
| Zambia Skyways | K8 | ZAK | Zambia |
| ZanAir | B4 | TAN | Tanzania |
| Zapolyarie Airlines | – | PZY | Russian Federation |
| Zenith International Airline | ZN | ZNA | Thailand |
| Zhetysu | – | JTU | Kazakhstan |
| Zhezkazgan Air | – | KZH | Kazakhstan |
| Zimex Aviation | XM | IMX | Switzerland |
| ZIPAIR Tokyo | ZG | TZP | Japan |
| Zoom Air | ZO | ZOA | India |
| Zorex Air Transport | – | ORZ | Spain |
| Zz | ZZ | – | Belgium |
| Псковавиа | – | PKV | Russian Federation |