| Abbreviation | Definition |
|---|---|
| IBA | International Bureau of Aviation |
| IBAA | Idaho Business Aviation Association |
| IBAC | International Business Aviation Council |
| IBF | Internally Blown Flap |
| ICAO | Intellectual Civil Aviation Organs |
| ICAO | International Civil Aviation Organization |
| ICAO | International Civilian Aviation Organization |
| ICAP | Interagency Committee For Aviation Policy |
| ICASS | International Confidential Aviation Safety Systems |
| ICATA | International Conference on Air Transportation and Aviation |
| ICAU | International Civil Aviation University |
| ICPL | Integrated Commercial Pilot Licence |
| ICSA | International Coalition for Sustainable Aviation |
| IDBP | Inherently Ducted Bi-Prop |
| IDN | Isolated Data Network |
| IDWG | Idaho Wing (Civil Air Patrol) |
| IFAR | International Forum for Aviation Research |
| IFC | Interim Flight Clearance |
| IFE | In-flight Entertainment |
| IFPP | Instrument flight procedures panel |