| 1 | WDL | WDL Aviation GmbH & Co. KG | IATA: WD, Callsign: WDL, Designator WD recalled by IATA. | D | AVCODES |
| 2 | WDL | WDL Aviation GmbH & Co. KG | IATA: WH, Callsign: WDL, IATA Prefix: 944, Name changed to German Airways. ICAO designator changed to GER. Designator WD recalled by IATA. | D | AVCODES |
| 3 | WDL | WDL Aviation | IATA: W1 | | ICAO1 |
| 4 | WDLC | WATERDALE INC | | | SCAC4 |
| 5 | WDLH | WADLEIGHS INC | | | SCAC4 |
| 6 | WDLL | WD LOGISTICS L L C | | | SCAC4 |
| 7 | WDLM | WILLY DOG LTD | | | SCAC4 |
| 8 | WDLO | WORLD OIL TOOLS INC | | | SCAC4 |
| 9 | WDLQ | WHITE DUCKS LTD | | | SCAC4 |
| 10 | WDLR | WENDLAND TRUCKING | | | SCAC1 |
| 11 | WDLS | WORLD LOGISTICS SERVICE (USA) INC. | | | SCAC1 |
| 12 | WDLS | WORLD LOGISTICS SERVICE (USA) INC | | | SCAC4 |
| 13 | WDLT | WORLD LINK TRANSPORTATION | | | SCAC4 |
| 14 | WDLX | Waddell Coal Mining Co., Inc. | 1/1952-10/1957; eliminated 4/1958 | | NAKINA |
| 15 | WDLX | Waddell Coal Mining Co., Inc. | 1/52-10/57 | | NRHS |
| 16 | WDLX | WADDELL COAL MINING CO., INC. | | | PWRC |
| 17 | WDLY | WOODIWISS LOG & TIMBER SYSTEMS INC | | | SCAC4 |
