| Postojna to Olympia Heights (Florida) | 5,172.38 mi (8,324.14 km) |
| Postojna to Omaha (Nebraska) | 5,049.43 mi (8,126.28 km) |
| Postojna to On Top of the World Designated Place (Florida) | 5,096.61 mi (8,202.20 km) |
| Postojna to Onalaska (Wisconsin) | 4,747.20 mi (7,639.89 km) |
| Postojna to Oneida (New York) | 4,188.71 mi (6,741.08 km) |
| Postojna to Oneonta (New York) | 4,190.30 mi (6,743.64 km) |
| Postojna to Ontario (California) | 6,156.02 mi (9,907.16 km) |
| Postojna to Ontario (Oregon) | 5,551.06 mi (8,933.57 km) |
| Postojna to Opa-locka (Florida) | 5,160.21 mi (8,304.56 km) |
| Postojna to Opelika (Alabama) | 5,058.14 mi (8,140.29 km) |
| Postojna to Opelousas (Louisiana) | 5,439.83 mi (8,754.56 km) |
| Postojna to Orange (California) | 6,176.34 mi (9,939.86 km) |
| Postojna to Orange (Texas) | 5,528.18 mi (8,896.75 km) |
| Postojna to Orange City (Florida) | 5,061.13 mi (8,145.10 km) |
| Postojna to Orangeburg (South Carolina) | 4,828.44 mi (7,770.62 km) |
