| Ridderkerk to Opwijk | 64.72 mi (104.16 km) |
| Ridderkerk to Ostend | 84.70 mi (136.32 km) |
| Ridderkerk to Oud-Heverlee | 71.46 mi (115.00 km) |
| Ridderkerk to Oud-Turnhout | 41.41 mi (66.64 km) |
| Ridderkerk to Oudenaarde | 82.44 mi (132.67 km) |
| Ridderkerk to Oudenburg | 83.43 mi (134.26 km) |
| Ridderkerk to Oupeye | 91.85 mi (147.83 km) |
| Ridderkerk to Overijse | 74.91 mi (120.56 km) |
| Ridderkerk to Overpelt | 57.00 mi (91.73 km) |
| Ridderkerk to Paal | 62.27 mi (100.21 km) |
| Ridderkerk to Peer | 62.60 mi (100.75 km) |
| Ridderkerk to Pepinster | 104.11 mi (167.56 km) |
| Ridderkerk to Peruwelz | 103.14 mi (165.99 km) |
| Ridderkerk to Perwez | 86.36 mi (138.98 km) |
| Ridderkerk to Philippeville | 115.18 mi (185.36 km) |
