| Ostrov to Olympia Heights (Florida) | 5,007.73 mi (8,059.16 km) |
| Ostrov to Omaha (Nebraska) | 4,797.66 mi (7,721.08 km) |
| Ostrov to On Top of the World Designated Place (Florida) | 4,914.45 mi (7,909.04 km) |
| Ostrov to Onalaska (Wisconsin) | 4,498.41 mi (7,239.48 km) |
| Ostrov to Oneida (New York) | 3,974.66 mi (6,396.60 km) |
| Ostrov to Oneonta (New York) | 3,979.91 mi (6,405.05 km) |
| Ostrov to Ontario (California) | 5,874.83 mi (9,454.63 km) |
| Ostrov to Ontario (Oregon) | 5,258.53 mi (8,462.78 km) |
| Ostrov to Opa-locka (Florida) | 4,995.22 mi (8,039.04 km) |
| Ostrov to Opelika (Alabama) | 4,855.60 mi (7,814.34 km) |
| Ostrov to Opelousas (Louisiana) | 5,225.30 mi (8,409.31 km) |
| Ostrov to Orange (California) | 5,895.06 mi (9,487.18 km) |
| Ostrov to Orange (Texas) | 5,310.19 mi (8,545.92 km) |
| Ostrov to Orange City (Florida) | 4,882.54 mi (7,857.69 km) |
| Ostrov to Orangeburg (South Carolina) | 4,635.58 mi (7,460.25 km) |
