| WAF | FK | | Flamenco Airways |
| WBA | FC | | Finncomm Airlines |
| WCA | | | West Coast Airways |
| WCB | | | West Africa Airlines |
| WCG | | | West Coast Airlines |
| WCP | FE | | Primaris Airlines |
| WCW | YH | | West Caribbean Airways |
| WDL | | | WDL Aviation |
| WDY | C8 | 488 | Chicago Express Airlines |
| WES | | | Western Express Air Lines |
| WGD | | | Vologda Aviation Enterprise |
| WIA | WM | 295 | Windward Island Airways |
| WIF | WF | 701 | Wideroe Cargo |
| WIG | | | Wiggins Airways |
| WJA | M3 | | Westjet Airlines |
| WLD | 6W | | Wilderness Airlines (1975) |
| WOA | WO | 468 | World Airways |
| WPL | XX | 624 | Aeronaves del Peru |
| WSF | WZ | 682 | West African Airlines |
| WSG | WG | 093 | Wasaya Airways |
| WTA | FK | 858 | Africa West |
| WTC | | | Weasua Air Transport |
| WZZ | W6 | | Wizz Air |
