| 1 | JEX | JAL Express | IATA: JC, Callsign: Janex, IATA Prefix: 688, Merged to Japan Airlines w.e.f. 30 September 2014. | J | AVCODES |
| 2 | JEX | Midway Airlines | IATA: JI, Callsign: Jet Ex, IATA Prefix: 878, Ceased operations | USA | AVCODES |
| 3 | JEX | JAL Express | IATA: JC | | ICAO1 |
| 4 | JEX | JAL Express Co., Ltd | | J | TRAFFIC |
| 5 | JEXA | JUBILEE EXPEDITING | | | SCAC4 |
| 6 | JEXD | J R M EXPRESS INC | | | SCAC4 |
| 7 | JEXH | JESSE EXPRESS | | | SCAC4 |
| 8 | JEXI | JONES EXPRESS, INC | | | SCAC1 |
| 9 | JEXI | JONES EXPRESS INC | | | SCAC4 |
| 10 | JEXL | J E D EXPRESS LIMITED | | | SCAC4 |
| 11 | JEXS | JET EXPRESS LLC | | | SCAC4 |
| 12 | JEXV | JAGUAR EXPEDITED SERVICES INC | | | SCAC4 |
| 13 | JEXY | JYNX EXPRESS | | | SCAC4 |
