| 1 | WOW | Air Southwest Ltd. | IATA: SZ, Callsign: Swallow, IATA Prefix: 429, Air Southwest was a British airline founded by Sutton Harbour Holdings in 2003. Ownership was transferred to Eastern Airways in September 2010 but operations ceased 12 months later on 30 September 2011. | GB | AVCODES |
| 2 | WOW | Wow Air ehf | IATA: WW, Callsign: Wowair, IATA Prefix: 377, Ceased operations on 28 March 2019. | IS | AVCODES |
| 3 | WOW | Air Southwest | | | ICAO1 |
| 4 | WOWH | WORLD OF WHEELS | | | SCAC4 |
| 5 | WOWK | WOWK, MILES | | | SCAC4 |
| 6 | WOWP | WADE ODELL WADE PADDED VAN | | | SCAC4 |
| 7 | WOWT | WOW TRANSPORTATION CORP | | | SCAC4 |
| 8 | WOWV | WOW-FREIGHT SERVICES DIVISION | | | SCAC4 |
| 9 | WOWX | Wilburine Oil Works, Ltd. | 8/1920-7/1923 | | NAKINA |
| 10 | WOWX | Valvoline Oil Co. (Warren Refinery) | 7/1930 | | NAKINA |
| 11 | WOWX | VALVOLINE OIL CO., WARREN REFINERY [WILBURINE OIL WORKS, LTD.] | | | PWRC |
