| Ponte San Pietro to Opwijk | 440.38 mi (708.72 km) |
| Ponte San Pietro to Ostend | 488.70 mi (786.49 km) |
| Ponte San Pietro to Oud-Heverlee | 420.66 mi (676.99 km) |
| Ponte San Pietro to Oud-Turnhout | 441.55 mi (710.61 km) |
| Ponte San Pietro to Oudenaarde | 449.75 mi (723.79 km) |
| Ponte San Pietro to Oudenburg | 484.20 mi (779.24 km) |
| Ponte San Pietro to Oupeye | 390.83 mi (628.97 km) |
| Ponte San Pietro to Overijse | 421.16 mi (677.80 km) |
| Ponte San Pietro to Overpelt | 426.37 mi (686.18 km) |
| Ponte San Pietro to Paal | 420.86 mi (677.31 km) |
| Ponte San Pietro to Peer | 420.51 mi (676.74 km) |
| Ponte San Pietro to Pepinster | 378.58 mi (609.27 km) |
| Ponte San Pietro to Peruwelz | 432.85 mi (696.60 km) |
| Ponte San Pietro to Perwez | 405.08 mi (651.91 km) |
| Ponte San Pietro to Philippeville | 388.56 mi (625.32 km) |
