| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| OUACHITA COUNTY MEDICAL CENTER | airport | United States | 33.58 | -92.84 | 212 | 0 | |
| OUN (UNIVERSITY OF OKLAHOMA WESTHEIMER) | airport | United States | 35.25 | -97.47 | 1182 | 0 | |
| OUR COMMUNITY HOSPITAL | airport | United States | 36.13 | -77.42 | 113 | 0 | |
| OUR DOMAIN | airport | United States | 39.07 | -75.73 | 65 | 0 | |
| OUR LADY OF LOURDES HOSPITAL | airport | United States | 30.21 | -92.03 | 90 | 0 | |
| OUR LADY OF THE LAKE R.M.C. | airport | United States | 30.40 | -91.10 | 46 | 0 | |
| OUR LADY'S | airport | United States | 39.98 | -74.83 | 18 | 0 | |
| OUSEL FALLS | airport | United States | 45.25 | -111.33 | 6600 | 0 | |
| OUTAGAMIE CO RGNL | airport | United States | 44.26 | -88.52 | 918 | 0 | |
| OUTBACK | airport | United States | 34.23 | -101.46 | 3286 | 0 | |
| OUTBACK RANCH AIRSTRIP | airport | United States | 33.85 | -113.57 | 1980 | 0 | |
| OUTER BANKS | airport | United States | 35.98 | -75.65 | 30 | 0 | |
| OUTLAW FLD | airport | United States | 36.62 | -87.41 | 550 | 0 | |
| OUZINKIE | airport | United States | 57.92 | -152.50 | 55 | 0 |