| 1 | JMX | Air Jamaica Express Limited | IATA: JQ, Callsign: Jamaica Express, IATA Prefix: 100, Ceased operations on 14 October 2005. IATA Designator changed from J4. | JA | AVCODES |
| 2 | JMX | Air Jamaica Express Limited | IATA: J4, Commenced operations on 18 April 1996. IATA Designator changed to JQ. | JA | AVCODES |
| 3 | JMX | Air Jamaica Express | | | ICAO1 |
| 4 | JMX | Jenney Manufacturing Co. | 8/1920-7/1935; 7/1937-1/1941 (not listed); 1/1943-4/1947 | | NAKINA |
| 5 | JMX | JENNEY MANUFACTURING CO. | | | PWRC |
| 6 | JMXC | JMX | | | SCAC4 |
| 7 | JMXI | JM EXPRESS TRANSPORTATION ENTERPRIS | | | SCAC4 |
| 8 | JMXJ | JM TRANSPORTATION INC | | | SCAC4 |
| 9 | JMXL | JMX | | | SCAC4 |
| 10 | JMXQ | J & M & T TRANSPORT INC | | | SCAC4 |
| 11 | JMXT | J-MAX TRANSPORTATION SERVICES INC | | | SCAC4 |
