| Walter Airlines | HE | LGW | |
| Wasaya Airways | WG | WSG | 093 |
| WDL Aviation | WDL | ||
| Weasua Air Transport | WTC | ||
| West Africa Airlines | WCB | ||
| West African Airlines | WZ | WSF | 682 |
| West Air | PCM | ||
| West Air Sweden | PT | SWN | 869 |
| West Caribbean Airways | YH | WCW | |
| West Coast Airlines | WCG | ||
| West Coast Airways | WCA | ||
| Western Express Air Lines | WES | ||
| Westjet Airlines | M3 | WJA | |
| WFP West Africa Air Service | |||
| Wideroe Cargo | WF | WIF | 701 |
| Wiggins Airways | WIG | ||
| Wilderness Airlines (1975) | 6W | WLD | |
| Windward Island Airways | WM | WIA | 295 |
| Wizz Air | W6 | WZZ | |
| World Air Holdings Inc | |||
| World Airways | WO | WOA | 468 |
| World Focus Airlines | VVF | ||
| World Wide Air Charter Systems | CSW | ||
| Wuhan Airlines | WU | CWU |