| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| OPA LOCKA | airport | United States | 25.91 | -80.28 | 8 | 0 | |
| OPELA | airport | United States | 32.96 | -96.91 | 445 | 0 | |
| OPEN A-1 RANCH | airport | United States | 30.14 | -93.23 | 16 | 0 | |
| OPERATING ENGINEERS PENSION TRUST BLDG | airport | United States | 34.06 | -118.29 | 441 | 0 | |
| OPERATIONS CENTER | airport | United States | 40.61 | -78.33 | 1035 | 0 | |
| OPF (OPA LOCKA) | airport | United States | 25.91 | -80.28 | 8 | 0 | |
| OPHEIM | airport | United States | 48.87 | -106.42 | 3264 | 0 | |
| OPHIR | airport | United States | 63.15 | -156.53 | 575 | 0 | |
| OPL (ST LANDRY PARISH AHART FLD) | airport | United States | 30.56 | -92.10 | 75 | 0 | |
| OPUS CENTER IRVINE | airport | United States | 33.68 | -117.85 | 36 | 0 |