| 1 | JI | Midway Airlines | ICAO: MDW, Callsign: Midway, IATA Prefix: 878, Suspended operations on 17 July 2002. | USA | AVCODES |
| 2 | JI | Midway Airlines | ICAO: JEX, Callsign: Jet Ex, IATA Prefix: 878, Ceased operations | USA | AVCODES |
| 3 | JI | Aeronaves del Este, S.A. | | MEX | AVCODES |
| 4 | JI | Aquair Luftfahrt GmbH & Co. | ICAO: AQU, Callsign: Aquair, | D | AVCODES |
| 5 | JI | Cool Tours d/b/a San Juan Aviation | Name changed to Eastern Caribbean Air Inc. dba EC Air. IATA Designator changed from UI* | PRI | AVCODES |
| 6 | JI | Cool Tours d/b/a Eastern Caribbean Air | Name changed from Cool Tours d/b/a San Juan Aviation. IATA Designator changed from UI* | PRI | AVCODES |
| 7 | JI | Eastern Caribbean Air Inc. dba EC Air | Name changed to Eastern Caribbean Airlines, Corp. Name changed from Cool Tours d/b/a Eastern Caribbean Air. IATA Designator changed from UI* | PRI | AVCODES |
| 8 | JI | Eastern Caribbean Airlines, Corp. | Ceased operations. Name changed from Eastern Caribbean Air Inc. dba EC Air. Name changed from Cool Tours d/b/a Eastern Caribbean Air. IATA Designator changed from UI* | PRI | AVCODES |
| 9 | JI | Jade Cargo International Company Limited | ICAO: JAE, Callsign: Jade Cargo, IATA Prefix: 189, Founded in 2004. Ceased operations on 31 December 2011. Joint venture between Shenzhen Airlines and Lufthansa Cargo | PRC | AVCODES |
| 10 | JI | Meraj Airlines | ICAO: MRJ, Callsign: Meraj Airlines, IATA Prefix: 648, | IR | AVCODES |
| 11 | JI | Armenian Airlines LLC | ICAO: AAG, Callsign: Apriocot, AOC granted on 27 December 2022. | AM | AVCODES |
| 12 | JIA | PSA Airlines | IATA: OH, Callsign: Blue Streak, Name reverted to Jetstream International Airlines. Changed name from Jetstream International Airlines w.e.f. 01 November 1995. US Airways Express Carrier | USA | AVCODES |
| 13 | JIA | Jetstream International Airlines | Callsign: Blue Streak, Changed name to PSA Airlines w.e.f. 01 November 1995. ICAO designator changed from VNA | USA | AVCODES |
| 14 | JIA | PSA Airlines, Inc. t/a US Airways Express | | USA | AVCODES |
| 15 | JIA | Jetstream International Airlines | Callsign: Jetstream International, ICAO callsign changed to Blue Streak. ICAO designator changed from VNA | USA | AVCODES |
| 16 | JIA | Jetstream International Airlines | IATA: OH, Callsign: Blue Streak, Name from PSA Airlines. Changed name from Jetstream International Airlines w.e.f. 01 November 1995. US Airways Express Carrier | USA | AVCODES |
| 17 | JIA | PSA Airlines | | | ICAO1 |
| 18 | JIAE | JUST IN TIM | | | SCAC4 |
| 19 | JIAL | J I A LOGISTICS INC | | | SCAC4 |
| 20 | JIB | Jibair | Callsign: Jibairline, | DJI | AVCODES |
| 21 | JIB | Jibair | | | ICAO1 |
| 22 | JIC | Jetgo International Co., Ltd. | Callsign: Jic-Jet, Established on 12 July 2004. Founded by Mr. Kachornsak Vongsakthavorn | T | AVCODES |
| 23 | JIC | Jetgo International | | | ICAO1 |
| 24 | JICL | JANSEN INTERNATIONAL CANADA INC | | | SCAC4 |
| 25 | JICN | JHAM INTERNATIONAL CORPORATION | | | SCAC4 |
| 26 | JICO | J & I TRANSPORT | | | SCAC4 |
| 27 | JID | Air Condal, S.A. | Callsign: Condal, | E | AVCODES |
| 28 | JIFL | JANCO INTERNATIONAL FREIGHT (CHINA) | | | SCAC4 |
| 29 | JIG | Sahih Airline Limited | Callsign: Sahih, | WAN | AVCODES |
| 30 | JIGC | J.I.T. LOGISTICS, INC | | | SCAC1 |
| 31 | JIGI | JONES INTERNATIONAL GROUPS INC | | | SCAC4 |
| 32 | JIHO | ČSAD JIHOTRANS a.s | | CZ | TRAFFIC |
| 33 | JIIA | JOF INTERMODAL INC | | | SCAC4 |
| 34 | JIIL | JMJ | | | SCAC4 |
| 35 | JILB | JORI INTERNATIONAL LTD | | | SCAC4 |
| 36 | JILD | J I L DISTRIBUTION INC | | | SCAC4 |
| 37 | JILW | JESSIES ILWACO FISH COMPANY INC | | | SCAC4 |
| 38 | JIM | Sark International Airways | Callsign: Sark, | GB | AVCODES |
| 39 | JIM | Sark International Airways | | | ICAO1 |
| 40 | JIMB | JIMBO TRANSPORTATION | | | SCAC4 |
| 41 | JIMC | JIMMIES TRUCKIN INC | | | SCAC4 |
| 42 | JIMH | JOHNNY ICE MAN TRUCKING INC | | | SCAC4 |
| 43 | JIMI | JIMS TRANSPORTATION INC | | | SCAC4 |
| 44 | JIMM | JIMMYS TRANSPORT EXPRESS | | | SCAC4 |
| 45 | JIMV | JUST IN TIME SERVICES INC | | | SCAC4 |
| 46 | JIMX | Custom Car Service Corp. | added 10/1959; elminated 4/1960 | | NAKINA |
| 47 | JIMX | Reese Tank Line Co. | added 10/1958; eliminated 10/1959 | | NAKINA |
| 48 | JIMX | Reese Tank Line Co. | added 10/58; eliminated 10/59 | | NRHS |
| 49 | JIMX | Custom Car Service Corp. | added 10/59 | | NRHS |
| 50 | JIMX | CUSTOM CAR SERVICE CORP. [REESE TANK LINE CO.] | | | PWRC |
| 51 | JINC | JET INC | | | SCAC4 |
| 52 | JINK | JACKMANS INC | | | SCAC4 |
| 53 | JINM | JUST IN TIME LLC | | | SCAC4 |
| 54 | JIS | Air Jupiter | Callsign: Jupair, | WAN | AVCODES |
| 55 | JISP | JH INTERNATIONAL SHIPPING | | | SCAC4 |
| 56 | JISS | JACKS INTERMODAL SERVICES | | | SCAC4 |
| 57 | JISU | QINGDAO JI SOURCE INTERNATIONAL LOGISTICS CO.,LTD. | | PRC | BIC |
| 58 | JIT | Jet It, LLC | Callsign: Jet It, | USA | AVCODES |
| 59 | JITA | JIT ROAD TRANSPORTATION | | | SCAC4 |
| 60 | JITE | JIT EXPRESS INC | | | SCAC4 |
| 61 | JITG | JIMS TRUCKING INC | | | SCAC4 |
| 62 | JITJ | JUST IN TIME SERVICES INC | | | SCAC4 |
| 63 | JITK | J I T EXPRESS, JITEX INC | | | SCAC4 |
| 64 | JITL | JIT STEEL SERVICE INC | | | SCAC4 |
| 65 | JITM | JUST IN TIME MESSENGER | | | SCAC4 |
| 66 | JITN | JUST IN TIME TRUCKING | | | SCAC4 |
| 67 | JITP | JAPAN INTERMODAL TRANSPORT | | | SCAC1 |
| 68 | JITT | JIT TRANSPORTATION | | | SCAC4 |
| 69 | JITW | JIT WAREHOUSING & LOGISTICS LLC | | | SCAC4 |
| 70 | JITY | JIT-EX INC | | | SCAC4 |
| 71 | JIV | Jivair AB | Callsign: Jivair, Established in 1981 | S | AVCODES |
| 72 | JIXC | J & I TRANSPORT CO INC | | | SCAC4 |
