| 1 | WDA | Wardair Canada Ltd. | IATA: WD, Callsign: Wardair, Merged into Canadian Airlines 15 January 1990. | CDN | AVCODES |
| 2 | WDA | Wimbi Dira Airways | IATA: 9C, Callsign: Wimbidira, Designator 9C* recalled by IATA. Accounting code 357 recalled by IATA. Founded in 2003. Operations commenced on 13 August 2003. | ZRE | AVCODES |
| 3 | WDA | Adam Aircraft Services GmbH | Callsign: Adam, | RSM | AVCODES |
| 4 | WDA | Wimbi Dira Airways | | | ICAO1 |
| 5 | WDAE | WOODALL ENTERPRISES INC | | | SCAC4 |
| 6 | WDAI | WAYNES DELIVERY | | | SCAC4 |
| 7 | WDAS | WALTS DRIVE-A-WAY SERVICE INC | | | SCAC4 |
| 8 | WDAX | Washington Dept. of Agriculture | 1/1994-7/2005 (not listed) | | NAKINA |
| 9 | WDAX | Washington Dept. of Agriculture | Jul-00 | | NRHS |
| 10 | WDAX | Washington Dept. of Agriculture | Jan-94 | | NRHS |
| 11 | WDAX | WASHINGTON DEPARTMENT OF AGRICULTURE | | | PWRC |
| 12 | WDAX | Washington Department of Agriculture | | | RSRV |
| 13 | WDAX | WASHINGTON DEPARTMENT OF AGRICULTUR | | | SCAC4 |
