| 1 | HTP | Heli Trip, S.A. de C.V. | Callsign: Heli Trip, Ceased Operations. | MEX | AVCODES |
| 2 | HTP | Hala Air | IATA: HY, Callsign: Hala Express, IATA Designator chnaged to HG. | LAR | AVCODES |
| 3 | HTP | Hala Air | IATA: HG, Callsign: Hala Express, IATA Designator changed from HY*. | LAR | AVCODES |
| 4 | HTP | Heli Trip | | | ICAO1 |
| 5 | HTPA | HERCULES TRANSPORT INC | | | SCAC4 |
| 6 | HTPD | HILL-TOP TRANSPORTATION INC | | | SCAC4 |
| 7 | HTPE | HOST, T PARKER INC | | | SCAC4 |
| 8 | HTPN | HYTECH PRODUCTION LTD | | | SCAC4 |
| 9 | HTPT | HOLTEN TRANSPORTATION INC | | | SCAC4 |
| 10 | HTPX | H. Thiessen Pickle Co. | 1/1945-10/1957; eliminated 4/1961 | | NAKINA |
| 11 | HTPX | H. Thiessen Pickle Co. | 1/52-10/57; eliminated 4/61 | | NRHS |
| 12 | HTPX | H. THIESSEN PICKLE CO. | | | PWRC |
