| Wallingford to Opwijk | 233.47 mi (375.74 km) |
| Wallingford to Ostend | 176.16 mi (283.51 km) |
| Wallingford to Oud-Heverlee | 256.11 mi (412.16 km) |
| Wallingford to Oud-Turnhout | 263.62 mi (424.25 km) |
| Wallingford to Oudenaarde | 210.86 mi (339.35 km) |
| Wallingford to Oudenburg | 180.13 mi (289.88 km) |
| Wallingford to Oupeye | 299.58 mi (482.13 km) |
| Wallingford to Overijse | 251.35 mi (404.50 km) |
| Wallingford to Overpelt | 283.08 mi (455.57 km) |
| Wallingford to Paal | 274.60 mi (441.93 km) |
| Wallingford to Peer | 285.51 mi (459.49 km) |
| Wallingford to Pepinster | 309.49 mi (498.08 km) |
| Wallingford to Peruwelz | 217.67 mi (350.30 km) |
| Wallingford to Perwez | 266.24 mi (428.46 km) |
| Wallingford to Philippeville | 265.43 mi (427.16 km) |
