| | IATA | ICAO | City | Region | State | Country ^ | | IDA | | Idaho Falls | | IDAHO | USA |
| ILI | | Iliamna | | ALASKA | USA |
| IND | | Indianapolis | | INDIANA | USA |
| INL | | International Falls | | MINNESOTA | USA |
| IYK | | Inyokern | | CALIFORNIA | USA |
| IMT | | Iron Mountain | | MICHIGAN | USA |
| IWD | | Ironwood | | MICHIGAN | USA |
| ISP | | Islip | | NEW YORK | USA |
| ITH | | Ithaca | | NEW YORK | USA |
| IST | | Istanbul | | | Turkey |
| ADB | | Izmir | | | Turkey |
| IBZ | | Ibiza | Ibiza | Baleares Islands | Spain |
| IKT | | Irkutsk | | | Russia |
| IJK | | Izhevsk | | | Russia |
| IAS | | Iasi | | | Romania |
| ILO | | Iloilo | | | Philippines |
| ILQ | | Ilo Moquegua | | | Peru |
| IQT | | Iquitos | | | Peru |
| ISB | | Islamabad | | | Pakistan |
| ZIH | | Ixtapa/Zihuatanejo | | Guerrero | Mexico |
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