| Castellaneta to Opwijk | 939.08 mi (1,511.30 km) |
| Castellaneta to Ostend | 991.26 mi (1,595.27 km) |
| Castellaneta to Oud-Heverlee | 917.66 mi (1,476.84 km) |
| Castellaneta to Oud-Turnhout | 932.46 mi (1,500.65 km) |
| Castellaneta to Oudenaarde | 951.91 mi (1,531.96 km) |
| Castellaneta to Oudenburg | 986.70 mi (1,587.94 km) |
| Castellaneta to Oupeye | 882.07 mi (1,419.55 km) |
| Castellaneta to Overijse | 919.32 mi (1,479.50 km) |
| Castellaneta to Overpelt | 914.81 mi (1,472.25 km) |
| Castellaneta to Paal | 912.78 mi (1,468.97 km) |
| Castellaneta to Peer | 909.41 mi (1,463.55 km) |
| Castellaneta to Pepinster | 869.71 mi (1,399.66 km) |
| Castellaneta to Peruwelz | 936.99 mi (1,507.95 km) |
| Castellaneta to Perwez | 902.83 mi (1,452.96 km) |
| Castellaneta to Philippeville | 890.77 mi (1,433.56 km) |
