| Castelletto sopra Ticino to Opwijk | 416.17 mi (669.76 km) |
| Castelletto sopra Ticino to Ostend | 461.64 mi (742.94 km) |
| Castelletto sopra Ticino to Oud-Heverlee | 397.66 mi (639.98 km) |
| Castelletto sopra Ticino to Oud-Turnhout | 421.31 mi (678.03 km) |
| Castelletto sopra Ticino to Oudenaarde | 423.27 mi (681.19 km) |
| Castelletto sopra Ticino to Oudenburg | 457.20 mi (735.80 km) |
| Castelletto sopra Ticino to Oupeye | 371.27 mi (597.50 km) |
| Castelletto sopra Ticino to Overijse | 397.51 mi (639.72 km) |
| Castelletto sopra Ticino to Overpelt | 407.48 mi (655.78 km) |
| Castelletto sopra Ticino to Paal | 400.46 mi (644.48 km) |
| Castelletto sopra Ticino to Peer | 401.51 mi (646.17 km) |
| Castelletto sopra Ticino to Pepinster | 359.32 mi (578.26 km) |
| Castelletto sopra Ticino to Peruwelz | 405.07 mi (651.90 km) |
| Castelletto sopra Ticino to Perwez | 381.87 mi (614.57 km) |
| Castelletto sopra Ticino to Philippeville | 362.71 mi (583.72 km) |
