| 1 | TWI | Tasawi Air Services Ltd. | IATA: 9X, Callsign: Tasawi, Designator 9X* recalled by IATA | PL | AVCODES |
| 2 | TWI | Tailwind Hava Yollari A.S. | IATA: TI, Callsign: Tailwind, IATA Prefix: 768, Founded in 2006. | TR | AVCODES |
| 3 | TWIA | TRADEWIND CONSTRUCTION LTD | | | SCAC4 |
| 4 | TWIB | TRUSS WORLD INC | | | SCAC4 |
| 5 | TWIC | TRANS WAGON INTL CO LTD | | | SCAC4 |
| 6 | TWID | TRANS WAGON INTL (USA) CO LTD | | | SCAC4 |
| 7 | TWIE | TOOL TEC WELDING INC | | | SCAC4 |
| 8 | TWIH | TWITCHELL FUEL CO | | | SCAC4 |
| 9 | TWIK | TWIN TRUCKING INC | | | SCAC4 |
| 10 | TWIL | TWIN LAKES TRANSPORTATION INC | | | SCAC4 |
| 11 | TWIM | TWIN OAKS MOVING COMPANY INC | | | SCAC4 |
| 12 | TWIN | TWIN STATE RAILROAD CORP. | | | PWRC |
| 13 | TWIP | T W P INCORPORATED | | | SCAC4 |
| 14 | TWIQ | TABCOR WORLDWIDE INC | | | SCAC4 |
| 15 | TWIR | TWIN RIVER TRANSPORTATION LLC | | | SCAC4 |
| 16 | TWIS | TRADEWINDS TRANSPORTATION LLC | | | SCAC4 |
| 17 | TWIT | TWILIGHT MARINE LTD | | | SCAC4 |
| 18 | TWIW | TWIN TOWING | | | SCAC4 |
