| 1 | WAL | Western Arctic Air Ltd. | Callsign: Western Arctic, Formerly Antler Aviation Ltd. | CDN | AVCODES |
| 2 | WAL | Western Airlines, Inc. | IATA: WA, Callsign: Western, Merged into Delta Air Lines | USA | AVCODES |
| 3 | WAL | Caribbean Sun Airlines, Inc. d/b/a World Atlantic Airlines | IATA: K8, Callsign: World Atlantic, Designator K8* recalled by IATA. Name changed from Caribbean Sun Airlines, Inc | USA | AVCODES |
| 4 | WAL | Caribbean Sun Airlines, Inc. d/b/a World Atlantic Airlines | IATA: WL, Callsign: World Atlantic, IATA Prefix: 527, Designator K8* recalled by IATA. Name changed from Caribbean Sun Airlines, Inc | USA | AVCODES |
| 5 | WAL | Western Airlines | IATA: WA | | ICAO1 |
| 6 | WAL | Western Arctic Air | | | ICAO1 |
| 7 | WAL | Western Allegheny R.R. Co. | 1/1975-1/1980 | | NAKINA |
| 8 | WAL | Western Allegheny R.R. Co. | 1/75-1/80 | | NRHS |
| 9 | WAL | WESTERN ALLEGHENY RAILROAD | | | PWRC |
| 10 | WAL | Western Allegheny Railroad | | | RSRV |
| 11 | WALB | MPK Wałbrzych | City: Wałbrzych | PL | TRAFFIC |
| 12 | WALC | WALLACE, R D OIL CO INC | | | SCAC4 |
| 13 | WALH | WALHALLA BEAN COMPANY | | | SCAC4 |
| 14 | WALL | WALL TRUCK LINE INC | | | SCAC4 |
| 15 | WALM | WAL-MART TRANSPORTATION LLC | | | SCAC4 |
| 16 | WALO | WALSHS OIL COMPANY | | | SCAC4 |
| 17 | WALP | WRIGHTMAN ALPINES | | | SCAC4 |
| 18 | WALQ | WALL TRUCKING | | | SCAC4 |
| 19 | WALR | WALLER TRUCK CO INC | | | SCAC4 |
| 20 | WALSC | Walsall Corporation | | GB | TRAFFIC |
| 21 | WALT | WALLACE TRUCKING | | | SCAC4 |
| 22 | WALU | EUROCONDAL SHIPPING SA | | | SCAC4 |
| 23 | WALV | WALTRANS INC | | | SCAC4 |
| 24 | WALZ | WABASH ALLOY | | | PWRC |
