| Staines-upon-Thames to Opwijk | 205.75 mi (331.12 km) |
| Staines-upon-Thames to Ostend | 148.78 mi (239.44 km) |
| Staines-upon-Thames to Oud-Heverlee | 228.24 mi (367.32 km) |
| Staines-upon-Thames to Oud-Turnhout | 237.05 mi (381.49 km) |
| Staines-upon-Thames to Oudenaarde | 182.69 mi (294.01 km) |
| Staines-upon-Thames to Oudenburg | 152.62 mi (245.61 km) |
| Staines-upon-Thames to Oupeye | 271.76 mi (437.35 km) |
| Staines-upon-Thames to Overijse | 223.34 mi (359.44 km) |
| Staines-upon-Thames to Overpelt | 256.31 mi (412.48 km) |
| Staines-upon-Thames to Paal | 247.32 mi (398.03 km) |
| Staines-upon-Thames to Peer | 258.53 mi (416.07 km) |
| Staines-upon-Thames to Pepinster | 281.49 mi (453.02 km) |
| Staines-upon-Thames to Peruwelz | 189.03 mi (304.22 km) |
| Staines-upon-Thames to Perwez | 238.05 mi (383.10 km) |
| Staines-upon-Thames to Philippeville | 236.75 mi (381.01 km) |
