| Monte San Pietro to Opwijk | 555.00 mi (893.19 km) |
| Monte San Pietro to Ostend | 604.28 mi (972.50 km) |
| Monte San Pietro to Oud-Heverlee | 534.80 mi (860.68 km) |
| Monte San Pietro to Oud-Turnhout | 554.09 mi (891.73 km) |
| Monte San Pietro to Oudenaarde | 565.20 mi (909.59 km) |
| Monte San Pietro to Oudenburg | 599.76 mi (965.22 km) |
| Monte San Pietro to Oupeye | 503.21 mi (809.84 km) |
| Monte San Pietro to Overijse | 535.60 mi (861.97 km) |
| Monte San Pietro to Overpelt | 538.12 mi (866.03 km) |
| Monte San Pietro to Paal | 533.59 mi (858.73 km) |
| Monte San Pietro to Peer | 532.37 mi (856.76 km) |
| Monte San Pietro to Pepinster | 490.86 mi (789.97 km) |
| Monte San Pietro to Peruwelz | 548.68 mi (883.01 km) |
| Monte San Pietro to Perwez | 519.37 mi (835.84 km) |
| Monte San Pietro to Philippeville | 503.92 mi (810.98 km) |
