| Abbreviation | Definition |
|---|---|
| IAH | Intercontinental Airport of Houston |
| IAH | International Airport of Houston |
| IAMA | Independent Aircraft Modifier Alliance |
| IAN | Integrated Approach Navigation |
| IAPA | Independent Airport Parking Association |
| IAPG | Iowa Aviation Promotion Group |
| IARC | Individual Aircraft Record Card |
| IAS | Indicated AirSpeed |
| IASA | International Aviation Safety Assessment |
| IASA | Irish Aviation Students Association |
| IASC | International Aviation Services Centre |
| IASO | International Aviation Services Organization |
| IASP | Integrated Aviation Systems Program |
| IAT | Interagency Aviation Training |
| IATA | International Air Transport Association |
| IATA | International Aviation and Travel Academy |
| IATB | I and the Bird |
| IATB | Interagency Aviation Technical Bulletin |
| IATS | International Aviation Training Show |
| IAWS | Integrated Aviation Weather Solution |