| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| IOA (IOANNINA) | airport | Greece | 39.70 | 20.82 | 1558 | 0 | |
| IOANNINA | airport | Greece | 39.70 | 20.82 | 1558 | 0 | |
| IOANNIS KAPODISTRIAS INTL | airport | Greece | 39.60 | 19.91 | 6 | 0 | |
| IOK (Iokea Airport) | airport | -8.40 | 146.28 | 39 | 0 | ||
| IOLA EMERGENCY | airport | United States | 44.51 | -89.14 | 995 | 0 | |
| IOM (ISLE OF MAN) | airport | Man, Isle of | 54.08 | -4.62 | 52 | 0 | |
| ION (Impfondo Airport) | airport | 1.62 | 18.07 | 1099 | 0 | ||
| IONE MUNI | airport | United States | 48.71 | -117.41 | 2108 | 0 | |
| IONIA CO | airport | United States | 42.94 | -85.06 | 818 | 0 | |
| IOP (Ioma Airport) | airport | -8.36 | 147.84 | 95 | 0 | ||
| IOR (Inishmore Aerodrome) | airport | 53.11 | -9.65 | 24 | 0 | ||
| IOS (ILHEUS) | airport | Brazil | -14.82 | -39.03 | 15 | 0 | |
| IOSCO CO | airport | United States | 44.31 | -83.42 | 606 | 0 | |
| IOU (Edmond Cané Airport) | airport | -22.46 | 166.78 | 7 | 0 | ||
| IOW (IOWA CITY MUNI) | airport | United States | 41.64 | -91.55 | 668 | 0 | |
| IOWA ARMY NATL GUARD | airport | United States | 42.56 | -92.40 | 866 | 0 | |
| IOWA CITY MUNI | airport | United States | 41.64 | -91.55 | 668 | 0 | |
| IOWA CO | airport | United States | 42.89 | -90.24 | 1171 | 0 | |
| IOWA FALLS MUNI | airport | United States | 42.47 | -93.27 | 1137 | 0 | |
| IOWA LUTHERAN HOSPITAL LIFE FLIGHT | airport | United States | 41.60 | -93.61 | 856 | 0 | |
| IOWA METHODIST MEDICAL CENTER | airport | United States | 41.59 | -93.63 | 990 | 0 |