| Ovar to Olympia Heights (Florida) | 4,155.43 mi (6,687.52 km) |
| Ovar to Omaha (Nebraska) | 4,338.99 mi (6,982.94 km) |
| Ovar to On Top of the World Designated Place (Florida) | 4,126.23 mi (6,640.52 km) |
| Ovar to Onalaska (Wisconsin) | 4,034.82 mi (6,493.41 km) |
| Ovar to Oneida (New York) | 3,351.92 mi (5,394.40 km) |
| Ovar to Oneonta (New York) | 3,339.80 mi (5,374.89 km) |
| Ovar to Ontario (California) | 5,572.19 mi (8,967.57 km) |
| Ovar to Ontario (Oregon) | 5,080.03 mi (8,175.52 km) |
| Ovar to Opa-locka (Florida) | 4,144.32 mi (6,669.63 km) |
| Ovar to Opelika (Alabama) | 4,149.72 mi (6,678.33 km) |
| Ovar to Opelousas (Louisiana) | 4,560.50 mi (7,339.41 km) |
| Ovar to Orange (California) | 5,592.35 mi (9,000.02 km) |
| Ovar to Orange (Texas) | 4,658.49 mi (7,497.11 km) |
| Ovar to Orange City (Florida) | 4,081.89 mi (6,569.17 km) |
| Ovar to Orangeburg (South Carolina) | 3,896.34 mi (6,270.55 km) |
