| Southampton to Opwijk | 243.28 mi (391.52 km) |
| Southampton to Ostend | 189.03 mi (304.22 km) |
| Southampton to Oud-Heverlee | 264.69 mi (425.98 km) |
| Southampton to Oud-Turnhout | 278.47 mi (448.15 km) |
| Southampton to Oudenaarde | 218.16 mi (351.09 km) |
| Southampton to Oudenburg | 192.28 mi (309.44 km) |
| Southampton to Oupeye | 307.89 mi (495.50 km) |
| Southampton to Overijse | 259.11 mi (416.99 km) |
| Southampton to Overpelt | 296.89 mi (477.80 km) |
| Southampton to Paal | 286.22 mi (460.63 km) |
| Southampton to Peer | 298.39 mi (480.22 km) |
| Southampton to Pepinster | 316.49 mi (509.35 km) |
| Southampton to Peruwelz | 219.80 mi (353.73 km) |
| Southampton to Perwez | 272.40 mi (438.38 km) |
| Southampton to Philippeville | 265.79 mi (427.74 km) |
