| 1 | WRT | Wright Air Lines, Inc. | Callsign: Wright-Air, Founded in 1966. Merged with Aeromech Airlines in 1983. Ceased operations in 1985. | USA | AVCODES |
| 2 | WRT | Wright Air Lines | | | ICAO1 |
| 3 | WRT | Warrior River Terminal Co. | 1/1941-7/1954 | | NAKINA |
| 4 | WRT | Warrior River Terminal Co. | Jan-52 | | NRHS |
| 5 | WRT | WARRIOR RIVER TERMINAL CO. | | | PWRC |
| 6 | WRTA | WESTERN RAILROAD ASSOCIATION | | | PWRC |
| 7 | WRTA | WARRIOR TRANSPORT LLC, THE | | | SCAC4 |
| 8 | WRTC | WHERTEC INC | | | SCAC4 |
| 9 | WRTD | WATFORD ROOF TRUSS LTD | | | SCAC4 |
| 10 | WRTE | WALRATH, T E TRUCKING INC | | | SCAC4 |
| 11 | WRTF | WOLF, RICHARD TRUCKING INC | | | SCAC4 |
| 12 | WRTG | WRAY TRUCKING CO LLC | | | SCAC4 |
| 13 | WRTH | WANDA RUTH TRANSPORTATION | | | SCAC4 |
| 14 | WRTI | WERNER TRANSPORTATION SERVICES INC | | | SCAC4 |
| 15 | WRTK | WOLFE, RICHARD TRUCKING INC | | | SCAC4 |
| 16 | WRTL | WILSON RAPID TRANSIT LINES, INC | | | SCAC1 |
| 17 | WRTL | WILSON RAPID TRANSIT LINES INC | | | SCAC4 |
| 18 | WRTM | WALTERS TRUCKING | | | SCAC4 |
| 19 | WRTN | WARRIOR TRANSPORT INC | | | SCAC4 |
| 20 | WRTP | WARD, ROGER TRANSPORTATION INC | | | SCAC4 |
| 21 | WRTS | WARREN, W W TRANSFER & STORAGE CO | | | SCAC4 |
| 22 | WRTV | WAGNER, ROB TRUCKING | | | SCAC4 |
| 23 | WRTW | WARD, ROGER TRANSPORTATION INC (AUS | | | SCAC4 |
| 24 | WRTX | Western Rail Leasing Corp. | added 7/1978; 1/1980; eliminated 10/1990 | | NAKINA |
| 25 | WRTX | Western Rail Leasing Corp. | added 7/78; 1/80; eliminated 10/90 | | NRHS |
| 26 | WRTX | RETIRED 902-10-92 ATP [WESTERN RAIL LEASING CORP.] | | | PWRC |
| 27 | WRTX | Western Rail Leasing Corporation | | | RSRV |
| 28 | WRTX | WISCONSIN RAILWAY PRESERVATION TRUS | | | SCAC4 |
| 29 | WRTY | WRTS | | | SCAC4 |
| 30 | WRTZ | WARREN TRUCK | | | PWRC |
