| 1 | LTC | Latcharter | IATA: 6Y, Callsign: Latcharter, Name changed to Smartlynx Airlines | LV | AVCODES |
| 2 | LTC | Smartlynx Airlines | IATA: 6Y, Callsign: Latcharter, ICAO Designator changed to ART. ICAO callsign changed to Smart Lynx. Name changed from Latcharter | LV | AVCODES |
| 3 | LTC | Latin Carga, Latinoamericana Aera de Carga | Callsign: Latincarga, | YV | AVCODES |
| 4 | LTC | Charter JETS, UAB | Callsign: Charter Jets, | LT | AVCODES |
| 5 | LTC | LatCharter | | | ICAO1 |
| 6 | LTC | Lafferty Transportation | 1/1975-1/1980 | | NAKINA |
| 7 | LTC | Lafferty Transportation | 1/75-1/80 | | NRHS |
| 8 | LTC | *LAFFERTY TRANSPORTATION CO. | | | PWRC |
| 9 | LTC | *LITHCOTE | | | PWRC |
| 10 | LTC | Lafferty Transportation | | | RSRV |
| 11 | LTC | Let's Train Connect | | | TRAFFIC |
| 12 | LTCA | LUXURY TRAVEL COACH LTD | | | SCAC3 |
| 13 | LTCB | LINCOLN TRUCKING CO INC | | | SCAC3 |
| 14 | LTCB | LINCOLN TRUCKING COMPANY | | | SCAC4 |
| 15 | LTCC | LTC TRUCKING COMPANY, INC | | | SCAC3 |
| 16 | LTCC | LAUDERDALE TRUCKING INC | | | SCAC4 |
| 17 | LTCC | Capital Citybus | | GB | TRAFFIC |
| 18 | LTCD | LEE, T C DISTRIBUTORS INC | | | SCAC3 |
| 19 | LTCD | LANE, TOM CREEK SIDE BELGIANS | | | SCAC4 |
| 20 | LTCE | LIBERTY TOURS & CHARTERS INC | | | SCAC3 |
| 21 | LTCE | LOGISTICA Y TRANSPORTADORA INTERNAC | | | SCAC4 |
| 22 | LTCE | London Central | | GB | TRAFFIC |
| 23 | LTCF | LETICA FREIGHT LINES | | | SCAC3 |
| 24 | LTCG | L/T CARTAGE INC | | | SCAC3 |
| 25 | LTCG | LINDER, TRENTON CARTAGE | | | SCAC4 |
| 26 | LTCH | LTC | | | SCAC4 |
| 27 | LTCJ | LTC TRANSPORT CO LTD | | | SCAC3 |
| 28 | LTCK | LTC TRANSPORT INC | | | SCAC3 |
| 29 | LTCL | LOMAK TRANSPORT CORP LTD | | | SCAC3 |
| 30 | LTCM | LANCE TRUCKING COMPANY | | | SCAC3 |
| 31 | LTCM | LANCE TRUCKING COMPANY | | | SCAC4 |
| 32 | LTCN | LTC FREIGHT (DIVISION OF LIQUID TRA | | | SCAC3 |
| 33 | LTCO | Lakeside Transportation, L.L.C. | added 7/1994; eliminated 4/1995; eliminated 7/1995 | | NAKINA |
| 34 | LTCO | Lakeside Transportation Co. | added 4/1994; eliminated 7/1994 | | NAKINA |
| 35 | LTCO | Lakeside Transportation Co. | added 4/94; eliminated 7/94 | | NRHS |
| 36 | LTCO | Lakeside Transportation, L.L.C. | added 7/94; eliminated 4/95; eliminated 7/95 | | NRHS |
| 37 | LTCO | LAKESIDE TRANSPORTATION, L.L.C. | | | PWRC |
| 38 | LTCO | LOGISTIC ONE LTD | | | SCAC4 |
| 39 | LTCP | LEE TOWING COMPANY INC | | | SCAC3 |
| 40 | LTCP | LOGISTIQUES TECNIC PLUS INC | | | SCAC4 |
| 41 | LTCQ | LUCAS TRUCKING CO | | | SCAC4 |
| 42 | LTCR | Leelanau Transit Co. | added 1/1979; 1/1980; eliminated 1/1991; added 1/1992; 1/1994; eliminated 1/1995; 7/2000-7/2005 | | NAKINA |
| 43 | LTCR | Leelanau Transit Co. | added 1/79; 1/80; eliminated 1/91; added 1/92; 1/94; eliminated 1/95; 7/2000 | | NRHS |
| 44 | LTCR | LEELANAU TRANSIT CO. (FORMERLY LTCO) | | | PWRC |
| 45 | LTCR | Leelanau Transit | | | RSRV |
| 46 | LTCR | LEELANAU TRANSIT CO | | | SCAC3 |
| 47 | LTCS | LETICIA SHIPPING COMPANY LIMITED | | | SCAC3 |
| 48 | LTCS | LANCTOT, CHARLES J & FILS INC | | | SCAC4 |
| 49 | LTCU | LEASE TC BV | | NL | BIC |
| 50 | LTCV | LES TRANSPORT CHEL-VAN INC | | | SCAC3 |
| 51 | LTCW | LOSURDO TRANSPORTATION CORP | | | SCAC4 |
| 52 | LTCW | Centerwest | | GB | TRAFFIC |
| 53 | LTCX | Praxair, Inc. | added 1/1993; 1/1994-7/2005 | | NAKINA |
| 54 | LTCX | Union Carbide Corp. | added 5/1983 | | NAKINA |
| 55 | LTCX | Union Carbide Corp., Chemicals and Plastics Co., Inc. | eliminated 1/1993 | | NAKINA |
| 56 | LTCX | Union Carbide Corp., Chemicals and Plastics Division | added 10/1980; eliminated 5/1983 | | NAKINA |
| 57 | LTCX | Union Carbide Corp. | added 7/1980; eliminated 10/1980 | | NAKINA |
| 58 | LTCX | Union Carbide Corp., Chemicals and Plastics Division | added 1/1979; 1/1980; eliminated 7/1980 | | NAKINA |
| 59 | LTCX | Union Carbide Corp., Chemicals and Plastics Operations Division | added 1/1968; 4/1970-1/1975; eliminated 1/1979 | | NAKINA |
| 60 | LTCX | Union Carbide Corp., Chemicals and Plastics | added 10/1967; eliminated 1/1968 | | NAKINA |
| 61 | LTCX | Union Carbide Corp., Chemicals Division | added 7/1964; 7/1965-10/1966; eliminated 10/1967 | | NAKINA |
| 62 | LTCX | Union Carbide Corp., Chemicals Division | added 7/64; 7/65-10/66; eliminated 10/67 | | NRHS |
| 63 | LTCX | Union Carbide Corp., Chemicals and Plastics | added 10/67; eliminated 1/68 | | NRHS |
| 64 | LTCX | Union Carbide Corp., Chemicals and Plastics Operations Division | added 1/68; 4/70-1/75; eliminated 1/79 | | NRHS |
| 65 | LTCX | Union Carbide Corp., Chemicals and Plastics Division | added 1/79; 1/80; eliminated 7/80 | | NRHS |
| 66 | LTCX | Union Carbide Corp. | added 7/80; eliminated 10/80 | | NRHS |
| 67 | LTCX | Union Carbide Corp., Chemicals and Plastics Division | added 10/80; eliminated 5/83 | | NRHS |
| 68 | LTCX | Union Carbide Corp. | added 5/83 | | NRHS |
| 69 | LTCX | Union Carbide Corp., Chemicals and Plastics Co., Inc. | eliminated 1/93 | | NRHS |
| 70 | LTCX | Praxair, Inc. | added 1/93; 1/94-7/2000 | | NRHS |
| 71 | LTCX | (UCOX) PRAXAIR, INC. [UNION CARBIDE CORP.] | | | PWRC |
| 72 | LTCX | Union Carbide Corporation (Praxair) | | | RSRV |
| 73 | LTCX | PRAXAIR, INC. | | | SCAC4 |
| 74 | LTCY | L T C TRUCKING INC | | | SCAC3 |
| 75 | LTCZ | LILY-TULIP CORP. | | | PWRC |