| Ortahisar to Opwijk | 1,711.43 mi (2,754.28 km) |
| Ortahisar to Ostend | 1,769.11 mi (2,847.12 km) |
| Ortahisar to Oud-Heverlee | 1,688.54 mi (2,717.45 km) |
| Ortahisar to Oud-Turnhout | 1,686.37 mi (2,713.95 km) |
| Ortahisar to Oudenaarde | 1,733.26 mi (2,789.41 km) |
| Ortahisar to Oudenburg | 1,764.92 mi (2,840.37 km) |
| Ortahisar to Oupeye | 1,645.36 mi (2,647.95 km) |
| Ortahisar to Overijse | 1,693.01 mi (2,724.64 km) |
| Ortahisar to Overpelt | 1,666.40 mi (2,681.81 km) |
| Ortahisar to Paal | 1,672.25 mi (2,691.22 km) |
| Ortahisar to Peer | 1,662.93 mi (2,676.22 km) |
| Ortahisar to Pepinster | 1,634.97 mi (2,631.23 km) |
| Ortahisar to Peruwelz | 1,727.36 mi (2,779.93 km) |
| Ortahisar to Perwez | 1,677.89 mi (2,700.31 km) |
| Ortahisar to Philippeville | 1,680.29 mi (2,704.17 km) |
