| 1 | THG | Thurston Aviation Ltd. | Callsign: Thurston, | GB | AVCODES |
| 2 | THG | Thurston Aviation Ltd. d/b/a Tal-Air | IATA: HZ, Callsign: Thurston, Name reverted back to Thurston Aviation Ltd. Formerly Thurston Aviation Ltd. | GB | AVCODES |
| 3 | THG | Thurston Aviation Ltd. | IATA: HZ, Callsign: Thurston, Name changed to Thurston Aviation Ltd. d/b/a Tal-Air | GB | AVCODES |
| 4 | THG | Thurston Aviation Ltd. | IATA: HZ, Callsign: Thurston, Designator recalled by IATA. Formerly Tal-Air | GB | AVCODES |
| 5 | THG | Thai Global Airline | | | ICAO1 |
| 6 | THG | THG Baugesellschaft mbH | | DE | VKM |
| 7 | THGB | THOMPSON, GREGORY B | | | SCAC3 |
| 8 | THGC | THREE G'S INC | | | SCAC3 |
| 9 | THGD | THT LOGISTICS LTD | | | SCAC4 |
| 10 | THGF | THOMPSON, G F CO LTD | | | SCAC4 |
| 11 | THGI | THOMPSON, GILBERT RAY | | | SCAC3 |
| 12 | THGI | TRI-MACH GROUP INC | | | SCAC4 |
| 13 | THGN | TAR HEEL STAGE LINES INC | | | SCAC3 |
| 14 | THGN | TRILLIUM HILL | | | SCAC4 |
| 15 | THGQ | THIES GENERAL TRUCKING, INC | | | SCAC3 |
| 16 | THGQ | THIES GENERAL TRUCKING INC | | | SCAC4 |
| 17 | THGR | TRANSPORTES HIGUERA | | | SCAC4 |
| 18 | THGS | T A H LOGISTICS LLC | | | SCAC4 |
| 19 | THGT | THOROUGHBRED TRUCKING INC | | | SCAC3 |
| 20 | THGT | TRANSPORTES TRHEGO | | | SCAC4 |
| 21 | THGW | THOMAS, G H, TRUCKING CO | | | SCAC3 |
| 22 | THGY | THREE RIVERS GYPSUM | | | SCAC3 |
