| Abbreviation | Definition |
|---|---|
| ITQ | Itaqui, Rio Grande do Sul, Brazil |
| IUE | Niue Island, Niue |
| IUL | Ilu, Indonesia |
| IUM | Summit Lake, British Columbia, Canada |
| IUS | Inus, Papua New Guinea |
| IVA | Ambanja, Madagascar |
| IVC | Invercargill, New Zealand |
| IVG | Ivangrad, Yugoslavia |
| IVH | Ivishak, Alaska USA |
| IVL | Ivalo, Finland |
| IVO | Chivolo, Colombia |
| IVR | Inverell, New South Wales, Australia |
| IVW | Inverway, Northern Territory, Australia |
| IWD | Gogebic County Airport, Ironwood, Michigan USA |
| IWJ | Iwami, Japan |
| IWS | West Houston Airport, Houston, Texas USA |
| IXA | Agartala, India |
| IXB | Bagdogra, India |
| IXC | Chandigarh, India |
| IXD | Allahabad, India |