| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| OTERO MILL | airport | United States | 32.96 | -105.96 | 4603 | 0 | |
| OTH (SOUTHWEST OREGON RGNL) | airport | United States | 43.42 | -124.25 | 17 | 0 | |
| OTHELLO COMMUNITY HOSPITAL | airport | United States | 46.83 | -119.17 | 1038 | 0 | |
| OTHELLO MUNI | airport | United States | 46.79 | -119.08 | 1139 | 0 | |
| OTIS ANGB | airport | United States | 41.66 | -70.52 | 131 | 0 | |
| OTIS HELISTOP DIVISION OF UTC | airport | United States | 41.71 | -72.80 | 362 | 0 | |
| OTK (TILLAMOOK) | airport | United States | 45.42 | -123.81 | 36 | 0 | |
| OTM (OTTUMWA INDUSTRIAL) | airport | United States | 41.11 | -92.45 | 845 | 0 | |
| OTN (ED-AIR) | airport | United States | 38.85 | -87.50 | 426 | 0 | |
| OTS (ANACORTES) | airport | United States | 48.50 | -122.66 | 241 | 0 | |
| OTT FARMS | airport | United States | 34.40 | -102.45 | 3817 | 0 | |
| OTTAWA EXECUTIVE | airport | United States | 42.82 | -85.93 | 740 | 0 | |
| OTTAWA MUNI | airport | United States | 38.54 | -95.25 | 966 | 0 | |
| OTTERBACH FARM | airport | United States | 41.57 | -89.17 | 840 | 0 | |
| OTTMAN LANDING | airport | United States | 44.59 | -92.26 | 1150 | 0 | |
| OTTO KAISER HOSPITAL | airport | United States | 28.85 | -97.88 | 395 | 0 | |
| OTTUMWA HOSPITAL | airport | United States | 41.03 | -92.39 | 845 | 0 | |
| OTTUMWA INDUSTRIAL | airport | United States | 41.11 | -92.45 | 845 | 0 | |
| OTZ (RALPH WIEN MEM) | airport | United States | 66.88 | -162.60 | 11 | 0 |