| 1901 | JLK | Jet-Link AG | | CH | AVCODES |
| 1902 | JLKA | J L TRUCKING | | | SCAC4 |
| 1903 | JLKI | JLK GLOBAL INC | | | SCAC4 |
| 1904 | JLKN | J & L TRUCKING | | | SCAC4 |
| 1905 | JLKR | J & L TRUCKING | | | SCAC4 |
| 1906 | JLL | Jet Lite (India) Limited | IATA: S2, Callsign: Lite Jet, IATA Prefix: 705, Name changed to JetKonnect on 25 March 2012. Name changed from Sahara Airlines Limited on 16 April 2007. ICAO designator changed from RSH | IND | AVCODES |
| 1907 | JLL | JetKonnect | IATA: S2, Callsign: Lite Jet, IATA Prefix: 705, Name changed from Jet Lite (India) Limited on 25 March 2012. Name changed from Sahara Airlines Limited on 16 April 2007. ICAO designator changed from RSH | IND | AVCODES |
| 1908 | JLL | JetKonnect | IATA: S2, Callsign: Lite Jet, IATA Prefix: 705, Temporarily suspended operations on 17 April 2019. Name changed from Jet Lite (India) Limited on 25 March 2012. Name changed from Sahara Airlines Limited on 16 April 2007. ICAO designator changed from RSH | IND | AVCODES |
| 1909 | JLLA | J & L LOGISTICS INC | | | SCAC4 |
| 1910 | JLLD | JADE LOGISTICS LLC | | | SCAC4 |
| 1911 | JLLF | JUSMIE LOGISTICS LLC | | | SCAC4 |
| 1912 | JLLG | JARED LOGISTICS LLC | | | SCAC4 |
| 1913 | JLLH | JJP LOGISTICS LLC | | | SCAC4 |
| 1914 | JLLK | J & L LOGISTICS INC | | | SCAC4 |
| 1915 | JLLL | J & L LOGISTICS LLC | | | SCAC4 |
| 1916 | JLLM | JDI LOGISTICS LIMITED | | | SCAC4 |
| 1917 | JLLN | J R LEASING LLC | | | SCAC4 |
| 1918 | JLLP | JACHELPA LLC | | | SCAC4 |
| 1919 | JLLR | JEAR LOGISTICS LLC | | | SCAC4 |
| 1920 | JLLS | JETEX LOGISTICS LLC | | | SCAC4 |
| 1921 | JLLT | J L LEASING & TRANSPORTATION | | | SCAC4 |
| 1922 | JLLU | JAPAN LINE, LTD. | | | PWRC |
| 1923 | JLLU | Japan Line | | | RSRV |
| 1924 | JLLU | JAPAN LINES LTD (USA) | | | SCAC4 |
| 1925 | JLLV | JET LOGISTICS LLC | | | SCAC4 |
| 1926 | JLLW | JARAH LLC | | | SCAC4 |
| 1927 | JLLX | LaRoche Industries, Inc. | added 1/1997; eliminated 7/1997; 7/2000-7/2005 (not listed) | | NAKINA |
| 1928 | JLLX | LaRoche Industries, Inc. | added 1/97; eliminated 7/97; 7/2000 | | NRHS |
| 1929 | JLLX | LAROCHE INDUSTRIES INCORPORATED | | | PWRC |
| 1930 | JLLX | LaRoche Industries | | | RSRV |
| 1931 | JLLY | JAMAC LOGISTICS LLC | | | SCAC4 |
| 1932 | JLLZ | JAPAN LINE, LTD. | | | PWRC |
| 1933 | JLLZ | Japan Line | | | RSRV |
| 1934 | JLLZ | JAPAN LINE, LTD. | | | SCAC4 |
| 1935 | JLM | Atlantic Express Airlines | IATA: 4X, Callsign: Atlantic Express, Commenced operation on 16 December 2004. Ceased operations | WAG | AVCODES |
| 1936 | JLM | Atlantic Express Airlines | Callsign: Atlantic Gambia, | WAG | AVCODES |
| 1937 | JLMB | J L M BROKERAGE INC | | | SCAC4 |
| 1938 | JLMG | JLM TRUCKING LLC | | | SCAC4 |
| 1939 | JLMI | JEFFERSON LANDMARK INC | | | SCAC4 |
| 1940 | JLMO | J & L MOTOR X-PRESS INC | | | SCAC4 |
| 1941 | JLMP | JLM TRANSPORT | | | SCAC4 |
| 1942 | JLMR | JLM TRANSPORT SERVICES INC | | | SCAC4 |
| 1943 | JLMT | JELLEMA TRANSPORTATION LLC | | | SCAC4 |
| 1944 | JLMU | JAPAN LINE, LTD | | | PWRC |
| 1945 | JLMU | Japan Line | | | RSRV |
| 1946 | JLMX | John. L. McCarthy | added 7/1983; eliminated 1/1990 | | NAKINA |
| 1947 | JLMX | John. L. McCarthy | eliminated 1/90 | | NRHS |
| 1948 | JLMX | JOHN L. McCARTHY | | | PWRC |
| 1949 | JLMX | John L. McCarthy | | | RSRV |
| 1950 | JLN | Eurojet Limited | Callsign: Jet Line, | M | AVCODES |
| 1951 | JLN | Private Jet Company Malta Limited | Callsign: Jetline, Name changed to JetClub Malta Limited. ICAO designator changed from PJM. ICAO callsign changed from Privatec. | M | AVCODES |
| 1952 | JLN | JetClub Malta Limited | Callsign: Jetline, Name changed from Private Jet Company Malta Limited. ICAO designator changed from PJM. ICAO callsign changed from Privatec. | M | AVCODES |
| 1953 | JLN | Eurojet Limited | | | ICAO1 |
| 1954 | JLN | JOURNEY LINES INC | | | SCAC4 |
| 1955 | JLNC | JESSUP LEASING & CARTAGE INC | | | SCAC4 |
| 1956 | JLNI | J-LINE, INC | | | SCAC1 |
| 1957 | JLNI | J-LINE INC | | | SCAC4 |
| 1958 | JLNN | JET LINE TRANSPORT CORP | | | SCAC4 |
| 1959 | JLNR | J LINE TRANSPORT | | | SCAC4 |
| 1960 | JLNT | JL | | | SCAC4 |
| 1961 | JLON | JLO TRANSPORT INC | | | SCAC4 |
| 1962 | JLOO | JRT LOGISTICS | | | SCAC4 |
| 1963 | JLOQ | JAKHU LOGISTICS | | | SCAC4 |
| 1964 | JLOS | JXM LOGISTICS | | | SCAC4 |
| 1965 | JLPK | JLP TRUCKING LLC | | | SCAC4 |
| 1966 | JLPP | JLP TRANSPORT INC | | | SCAC4 |
| 1967 | JLPQ | J L P EXPRESS INC | | | SCAC4 |
| 1968 | JLPU | JAPAN LINE, LTD. | | | PWRC |
| 1969 | JLPU | Japan Line | | | RSRV |
| 1970 | JLRN | J & L TRANSPORT | | | SCAC4 |
| 1971 | JLS | Jet Alsace | Callsign: Jet Alsace, Ceased operations | F | AVCODES |
| 1972 | JLS | Jet Line STP | | STP | AVCODES |
| 1973 | JLSA | J L S TRANSPORTATION INC | | | SCAC4 |
| 1974 | JLSB | JLSC EDUCATIONAL TOUR BUS INC | | | SCAC4 |
| 1975 | JLSC | JASPER LEASING CO INC | | | SCAC4 |
| 1976 | JLSI | JUTUL SHIPPING S A | | | SCAC4 |
| 1977 | JLSJ | JASSO LOGISTICS SA DE CV | | | SCAC4 |
| 1978 | JLSN | JL SONS | | | SCAC4 |
| 1979 | JLSR | J & L SERVICES INC | | | SCAC4 |
| 1980 | JLST | JLS TRUCKING LLC | | | SCAC4 |
| 1981 | JLSU | JAPAN LINE, LTD. | | | PWRC |
| 1982 | JLSU | Japan Line | | | RSRV |
| 1983 | JLSX | Jones & Laughlin Steel Corp. | 7/1932-10/1966; eliminated 1/1970 | | NAKINA |
| 1984 | JLSX | Jones & Laughlin Steel Corp. | 4/38-10/66; eliminated 1/70 | | NRHS |
| 1985 | JLSX | JONES & LAUGHLIN STEEL CORP. | | | PWRC |
| 1986 | JLSZ | JAPAN LINE, LTD. | | | PWRC |
| 1987 | JLSZ | Japan Line | | | RSRV |
| 1988 | JLSZ | JAPAN LINE, LTD. | | | SCAC4 |
| 1989 | JLT | Jetlink Express (T) Limited | | EAT | AVCODES |
| 1990 | JLT | Jönköping Länstrafik | | S | TRAFFIC |
| 1991 | JLT | Jönköpings Länstrafik AB | | SE | VKM |
| 1992 | JLTB | J & L TRUCKING | | | SCAC4 |
| 1993 | JLTE | J & L TRUCKING | | | SCAC4 |
| 1994 | JLTF | JD LOGISTICS TRUCKING INC | | | SCAC4 |
| 1995 | JLTI | J & L TRANSPORT INC | | | SCAC4 |
| 1996 | JLTJ | J & L TRUCKING CO | | | SCAC4 |
| 1997 | JLTL | J-LINE TRANSPORT LTD | | | SCAC4 |
| 1998 | JLTM | J & L TRANSPORT INC | | | SCAC4 |
| 1999 | JLTP | JLT ENTERPRISES INC | | | SCAC4 |
| 2000 | JLTR | J&L Transport LLC | | GB | TRAFFIC |
