| Abbreviation | Definition |
|---|---|
| IUS | Inertial Upper Stage |
| IV | Isolation Valve |
| IVAO | International Virtual Aviation Organisation |
| IWWF | Inter-Woven Wire Fabric |
| JAA | Jacksonville Aviation Authority |
| JAA | Joint Aviation Agencies |
| JAA | Joint Aviation Agenciesb |
| JAA | Joint Aviation Authority |
| JAARS | Jungle Aviation and Radio Services |
| JAFS | Japan Airport Fueling Service |
| JAL | Japan Air Lines |
| JAL | Japan AirLines |
| JALIS | Joint Airlift Logistics Information System |
| JAOPA | Jamaican Aviation Operators and Pilots Association |
| JAR | Joint Aviation Regulation |
| JASP | Joint Aircraft Survivability Program |
| JASPO | Joint Aircraft Survivability Program Office |
| JAU | Joint Aviation Unit |
| JCIA | Jefferson County International Airport |
| JCIA | Jorge Chávez International Airport |