| Abbreviation | Definition |
|---|---|
| IGI | Indira Gandhi International Airport |
| IGL | Cigli Airport, Izmir, Turkey |
| IGM | Kingman, Arizona USA |
| IGN | Iligan, Philippines |
| IGO | Chigorodo, Colombia |
| IGQ | Lansing Municipal Airport |
| IGR | Iguazu, MI, Argentina |
| IGU | Iguassu Falls, PR, Brazil |
| IHA | Niihama, Japan |
| IHN | Qishn, Yemen |
| IHO | Ihosy, Madagascar |
| IHU | Ihu, Papua New Guinea |
| II48 | WTHR Channel 13 Television Studio Heliport, Indianapolis, Indiana USA |
| IIA | Inishmaan, Republic Of Ireland |
| IIN | Nishinoomote, Japan |
| IIS | Nissan Island, Papua New Guinea |
| IJK | Izhevsk, Russia |
| IJU | Ijui, Rio Grande do Sul, Brazil |
| IJX | Jacksonville Municipal Airport, Jacksonville, Illinois USA |
| IKB | Wilkesboro, North Carolina USA |