| Somerset to Opwijk | 3,678.27 mi (5,919.61 km) |
| Somerset to Ostend | 3,620.66 mi (5,826.88 km) |
| Somerset to Oud-Heverlee | 3,701.25 mi (5,956.59 km) |
| Somerset to Oud-Turnhout | 3,701.62 mi (5,957.18 km) |
| Somerset to Oudenaarde | 3,657.53 mi (5,886.23 km) |
| Somerset to Oudenburg | 3,624.96 mi (5,833.80 km) |
| Somerset to Oupeye | 3,744.02 mi (6,025.42 km) |
| Somerset to Overijse | 3,697.13 mi (5,949.95 km) |
| Somerset to Overpelt | 3,721.58 mi (5,989.31 km) |
| Somerset to Paal | 3,716.38 mi (5,980.93 km) |
| Somerset to Peer | 3,725.24 mi (5,995.20 km) |
| Somerset to Pepinster | 3,754.80 mi (6,042.77 km) |
| Somerset to Peruwelz | 3,665.22 mi (5,898.60 km) |
| Somerset to Perwez | 3,712.67 mi (5,974.97 km) |
| Somerset to Philippeville | 3,712.91 mi (5,975.36 km) |
