| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| OK Landing | city | Louisiana | United States | 31.77 | -91.56 | 49 | |
| OKANOGAN LEGION | airport | United States | 48.36 | -119.57 | 1042 | 0 | |
| OKARCHE | airport | United States | 35.73 | -97.97 | 1239 | 0 | |
| OKC (WILL ROGERS WORLD) | airport | United States | 35.39 | -97.60 | 1295 | 0 | |
| OKEECHOBEE CO | airport | United States | 27.26 | -80.85 | 34 | 0 | |
| OKEELANTA | airport | United States | 26.58 | -80.76 | 14 | 0 | |
| OKEFENOKEE | airport | United States | 30.74 | -82.13 | 125 | 0 | |
| OKEMAH FLYING FIELD | airport | United States | 35.43 | -96.28 | 867 | 0 | |
| OKK (KOKOMO MUNI) | airport | United States | 40.53 | -86.06 | 830 | 0 | |
| OKLAHOMA NATIONAL GUARD | airport | United States | 35.50 | -97.47 | 1190 | 0 | |
| OKM (OKMULGEE RGNL) | airport | United States | 35.67 | -95.95 | 720 | 0 | |
| OKMULGEE RGNL | airport | United States | 35.67 | -95.95 | 720 | 0 | |
| OKOLONA MUNI RICH STOVALL FLD | airport | United States | 34.02 | -88.73 | 335 | 0 | |
| OKOLONA PLANTATION | airport | United States | 39.48 | -75.70 | 61 | 0 | |
| OKTIBBEHA | airport | United States | 33.50 | -88.68 | 250 | 0 | |
| OKTIBBEHA COUNTY HOSPITAL | airport | United States | 33.48 | -88.82 | 265 | 0 |