| Ortahisar to Olympia Heights (Florida) | 6,332.50 mi (10,191.18 km) |
| Ortahisar to Omaha (Nebraska) | 6,111.57 mi (9,835.62 km) |
| Ortahisar to On Top of the World Designated Place (Florida) | 6,249.70 mi (10,057.92 km) |
| Ortahisar to Onalaska (Wisconsin) | 5,817.23 mi (9,361.92 km) |
| Ortahisar to Oneida (New York) | 5,315.19 mi (8,553.97 km) |
| Ortahisar to Oneonta (New York) | 5,320.75 mi (8,562.92 km) |
| Ortahisar to Ontario (California) | 7,115.74 mi (11,451.68 km) |
| Ortahisar to Ontario (Oregon) | 6,462.00 mi (10,399.58 km) |
| Ortahisar to Opa-locka (Florida) | 6,320.24 mi (10,171.45 km) |
| Ortahisar to Opelika (Alabama) | 6,196.36 mi (9,972.08 km) |
| Ortahisar to Opelousas (Louisiana) | 6,565.24 mi (10,565.73 km) |
| Ortahisar to Orange (California) | 7,135.42 mi (11,483.36 km) |
| Ortahisar to Orange (Texas) | 6,649.18 mi (10,700.83 km) |
| Ortahisar to Orange City (Florida) | 6,216.03 mi (10,003.73 km) |
| Ortahisar to Orangeburg (South Carolina) | 5,974.58 mi (9,615.15 km) |
