| W3 | FYH | 850 | Flyhy Cargo Airlines |
| W5 | IRM | 537 | Mahan Air |
| W6 | WZZ | Wizz Air | |
| W7 | SAH | 271 | Sayakhat Air Company |
| W8 | CJT | 489 | Cargojet Airways |
| W9 | AAB | Abelag | |
| W9 | JAB | Air Bagan | |
| WB | SAN | 739 | SAN Servicios Aereos Nacionales |
| WB | RWD | 459 | Rwandair Express |
| WC | ISV | 282 | Islena Airlines |
| WC | DKR | Teranca | |
| WD | HBC | 851 | Haitian Aviation Lines |
| WD | DSR | 761 | DAS Air Cargo |
| WE | CWC | 307 | Centurion Air Cargo |
| WE | RTL | 915 | Rheintalflug Seewald |
| WF | WIF | 701 | Wideroe Cargo |
| WG | WSG | 093 | Wasaya Airways |
| WH | CNW | 783 | China Northwest Airlines |
| WI | TDX | TradeWinds Airlines Inc | |
| WJ | LAL | 927 | Air Labrador |
| WK | AFB | 676 | American Falcon |
| WL | APP | Aerolineas Pacifico Atlantico SA | |
| WM | WIA | 295 | Windward Island Airways |
| WN | SWA | 526 | Southwest Airlines |
| WO | WOA | 468 | World Airways |
| WP | PRI | 347 | Aloha Islandair |
| WP | MKU | Island Air | |
| WQ | RMV | 534 | Romavia |
| WR | HRH | 971 | Royal Tongan Airlines |
| WT | NGA | Nigeria Airlines | |
| WU | CWU | Wuhan Airlines | |
| WV | KKB | 399 | Air South Airlines |
| WW | CWW | CanAir Cargo | |
| WX | BCY | 689 | Cityjet |
| WY | OAS | 910 | Oman Air |
| WZ | RRM | Acvila Air-Romanian Carrier | |
| WZ | WSF | 682 | West African Airlines |