| Somerset to Olivares | 3,583.83 mi (5,767.62 km) |
| Somerset to Olivenza | 3,499.46 mi (5,631.84 km) |
| Somerset to Olot | 3,850.99 mi (6,197.57 km) |
| Somerset to Onate | 3,600.02 mi (5,793.67 km) |
| Somerset to Onda | 3,790.77 mi (6,100.66 km) |
| Somerset to Onteniente | 3,809.95 mi (6,131.53 km) |
| Somerset to Orihuela | 3,816.93 mi (6,142.76 km) |
| Somerset to Osuna | 3,641.17 mi (5,859.89 km) |
| Somerset to Ourense | 3,363.09 mi (5,412.38 km) |
| Somerset to Oviedo | 3,431.96 mi (5,523.21 km) |
| Somerset to Paiporta | 3,800.02 mi (6,115.53 km) |
| Somerset to Pajara | 3,474.48 mi (5,591.64 km) |
| Somerset to Palafolls | 3,878.85 mi (6,242.41 km) |
| Somerset to Palafrugell | 3,890.11 mi (6,260.52 km) |
| Somerset to Palamos | 3,890.77 mi (6,261.58 km) |
