| 1 | TDX | Tradewinds Airlines, Inc. | Callsign: Tradewinds Express, Name changed to Sky Lease 1, Inc. IATA designator WI* voluntary surrenered | USA | AVCODES |
| 2 | TDX | Tradewinds Airlines, Inc. | IATA: WI, Callsign: Tradewinds Express, Designator WI* recalled by IATA. IATA designator WI* reinstated | USA | AVCODES |
| 3 | TDX | Tradewinds Airlines | | | ICAO1 |
| 4 | TDXB | TDR EXPRESS INC | | | SCAC4 |
| 5 | TDXE | TRUCKDEPOT EXPEDITE INC | | | SCAC4 |
| 6 | TDXG | TDX LOGISTICS INC | | | SCAC4 |
| 7 | TDXH | TRENDEX HOME DESIGNS INC | | | SCAC4 |
| 8 | TDXI | TRANSPORTATION DATA XCHANGE INC | | | SCAC3 |
| 9 | TDXK | THREE (3) D TRANSFER INC | | | SCAC4 |
| 10 | TDXN | TRUSTED TRANSPORTATION SOLUTIONS | | | SCAC4 |
| 11 | TDXO | THUNDER TRANSPORTATION | | | SCAC4 |
| 12 | TDXP | TD EXPRESS INC | | | SCAC3 |
| 13 | TDXQ | TRADEX INC | | | SCAC4 |
| 14 | TDXS | TD EXPRESS INC | | | SCAC4 |
| 15 | TDXT | T D X TRUCKING INCORPORATED | | | SCAC4 |
