| 1 | LTP | LATPASS Airlines | IATA: QJ, Callsign: Latpass, IATA Prefix: 937, Designator QJ* and Prefix Code 937 recalled by IATA | LV | AVCODES |
| 2 | LTP | LATPASS Airlines | Callsign: Latpass, Designator QJ* and Prefix Code 937 recalled by IATA | LV | AVCODES |
| 3 | LTPB | LOUISIANA TRANSPORTATION INC (BROKE | | | SCAC4 |
| 4 | LTPC | LEEMAR TRANSPORT CORP | | | SCAC3 |
| 5 | LTPG | LOUISIANA TRANSPORTATION INC (GOVER | | | SCAC4 |
| 6 | LTPI | LOUISIANA TRANSPORTATION INC | | | SCAC4 |
| 7 | LTPJ | LES TRANSPORTS JONATHAN INC | | | SCAC3 |
| 8 | LTPL | LILY TRANSPORT LINES INC | | | SCAC3 |
| 9 | LTPL | LILY DISTRIBUTION SERVICES | | | SCAC4 |
| 10 | LTPM | LES TRANSPORT MITIS INC | | | SCAC3 |
| 11 | LTPO | LAERCO TRANSPORTATION & WAREHOUSE | | | SCAC3 |
| 12 | LTPO | LUTZ PRECISION LTD | | | SCAC4 |
| 13 | LTPQ | LEE TRANSPORT INC | | | SCAC3 |
| 14 | LTPQ | LINCOLN TRANSPORT PHOENIX INC | | | SCAC4 |
| 15 | LTPS | LONG TRANSPORTATION SERVICES, INC | | | SCAC3 |
| 16 | LTPS | LONG TRANSPORTATION SERVICES INC | | | SCAC4 |
| 17 | LTPX | Lewis Tar Products Co. | 7/1935-10/1957; eliminated 10/1960 | | NAKINA |
| 18 | LTPX | Lewis Tar Products Co. | 4/38-10/57; eliminated 10/60 | | NRHS |
| 19 | LTPX | LEWIS TAR PRODUCTS CO. | | | PWRC |
