| Castiglion Fiorentino to Opwijk | 639.15 mi (1,028.61 km) |
| Castiglion Fiorentino to Ostend | 687.77 mi (1,106.86 km) |
| Castiglion Fiorentino to Oud-Heverlee | 619.15 mi (996.42 km) |
| Castiglion Fiorentino to Oud-Turnhout | 638.83 mi (1,028.09 km) |
| Castiglion Fiorentino to Oudenaarde | 648.81 mi (1,044.15 km) |
| Castiglion Fiorentino to Oudenburg | 683.26 mi (1,099.60 km) |
| Castiglion Fiorentino to Oupeye | 587.96 mi (946.23 km) |
| Castiglion Fiorentino to Overijse | 619.83 mi (997.52 km) |
| Castiglion Fiorentino to Overpelt | 622.95 mi (1,002.54 km) |
| Castiglion Fiorentino to Paal | 618.29 mi (995.04 km) |
| Castiglion Fiorentino to Peer | 617.18 mi (993.26 km) |
| Castiglion Fiorentino to Pepinster | 575.62 mi (926.37 km) |
| Castiglion Fiorentino to Peruwelz | 631.87 mi (1,016.89 km) |
| Castiglion Fiorentino to Perwez | 603.65 mi (971.48 km) |
| Castiglion Fiorentino to Philippeville | 587.60 mi (945.65 km) |
