| Castelvetrano to Opwijk | 1,010.02 mi (1,625.47 km) |
| Castelvetrano to Ostend | 1,052.65 mi (1,694.07 km) |
| Castelvetrano to Oud-Heverlee | 992.14 mi (1,596.70 km) |
| Castelvetrano to Oud-Turnhout | 1,016.17 mi (1,635.37 km) |
| Castelvetrano to Oudenaarde | 1,015.27 mi (1,633.91 km) |
| Castelvetrano to Oudenburg | 1,048.33 mi (1,687.13 km) |
| Castelvetrano to Oupeye | 966.02 mi (1,554.65 km) |
| Castelvetrano to Overijse | 991.72 mi (1,596.01 km) |
| Castelvetrano to Overpelt | 1,002.11 mi (1,612.74 km) |
| Castelvetrano to Paal | 995.32 mi (1,601.82 km) |
| Castelvetrano to Peer | 996.17 mi (1,603.17 km) |
| Castelvetrano to Pepinster | 953.99 mi (1,535.30 km) |
| Castelvetrano to Peruwelz | 995.74 mi (1,602.49 km) |
| Castelvetrano to Perwez | 976.32 mi (1,571.23 km) |
| Castelvetrano to Philippeville | 955.73 mi (1,538.09 km) |
