Port name - airport
| Type | Name | Country |
| Airport | WATERTOWN (ART) | USA |
| Airport | HYDABURG (HYG) | USA |
| Airport | IDAHO FALLS (IDA) | USA |
| Airport | WATERLOO (ALO) | USA |
| Airport | ILIAMNA (ILI) | USA |
| Airport | WASHINGTON (IAD) | USA |
| Airport | INDIANAPOLIS (IND) | USA |
| Airport | INTERNATIONAL FALLS (INL) | USA |
| Airport | INYOKERN (IYK) | USA |
| Airport | WASHINGTON (IAD) | USA |
| Airport | IRON MOUNTAIN (IMT) | USA |
| Airport | WASHINGTON (DCA) | USA |
| Airport | IRONWOOD (IWD) | USA |
| Airport | WALLA WALLA (ALW) | USA |
| Airport | WAINWRIGHT (AIN) | USA |
| Airport | ISLIP (ISP) | USA |
| Airport | ITHACA (ITH) | USA |
| Airport | WACO (ACT) | USA |
| Airport | VISALIA (VIS) | USA |
| Airport | VICTORIA (VCT) | USA |