| 1 | WOA | World Airways, Inc. | IATA: WO, Callsign: World, IATA Prefix: 468, Founded on 29 March 1948. Ceased operations on 27 March 2014. Designator WO reinstated by IATA | USA | AVCODES |
| 2 | WOA | World Airways, Inc. | IATA: WO, Callsign: World Airways, IATA Prefix: 468, Founded on 29 March 1948. | USA | AVCODES |
| 3 | WOA | World Airways | IATA: WO | | ICAO1 |
| 4 | WOAA | WANKLYN OIL CO INC | | | SCAC4 |
| 5 | WOAI | WEST OAHU AGGREGATE CO INC | | | SCAC4 |
| 6 | WOAK | WHITE OAK LOGISTICS INC | | | SCAC4 |
| 7 | WOAL | WOODLAND TRANSFER | | | SCAC4 |
| 8 | WOAX | Gulf States Corp. | 7/1930-7/1932 | | NAKINA |
| 9 | WOAX | GULF STATES CORP. | | | PWRC |
