| 1 | THO | Transportes Aereos Centroamericanos de Honduras (TACA de Honduras) | Callsign: Lempira, | HN | AVCODES |
| 2 | THO | Thro Aviation, Inc. d/b/a ZEN Flight | Callsign: Thro, ICAO designator changed to XEN. ICAO Callsign changed to Zen Jet. | USA | AVCODES |
| 3 | THO | TACA De Honduras | | | ICAO1 |
| 4 | THOA | TRANSPORTES HO SA DE CV | | | SCAC4 |
| 5 | THOB | THOMPSON, BRAD | | | SCAC4 |
| 6 | THOC | THOMSEN OIL CO | | | SCAC4 |
| 7 | THOE | THOMPSON & SONS ENTERPRISES INC | | | SCAC4 |
| 8 | THOJ | THORNLEY ENTERPRISES INC | | | SCAC4 |
| 9 | THOL | THOMS TRANSPORT CO INC | | | SCAC4 |
| 10 | THOM | THOMSON TERMINALS LIMITED | | | SCAC4 |
| 11 | THOO | THOMAS TRUCKING INC | | | SCAC4 |
| 12 | THOP | THREE-O MANUFACTURING INC | | | SCAC4 |
| 13 | THOR | THORSONS MARKETING ASSOCIATES CANAD | | | SCAC4 |
| 14 | THOS | THOR SHIPPING LIMITED | | | SCAC4 |
| 15 | THOT | TEXAS HOT SHOT CO | | | SCAC4 |
| 16 | THOW | THOMPSON MOTOR COACH | | | SCAC4 |
| 17 | THOY | TALLY HO INC | | | SCAC4 |
