| Somerset to Opole | 4,227.64 mi (6,803.73 km) |
| Somerset to Orzesze | 4,276.69 mi (6,882.67 km) |
| Somerset to Osowa | 4,120.85 mi (6,631.86 km) |
| Somerset to Ostroda | 4,198.26 mi (6,756.45 km) |
| Somerset to Ostroleka | 4,277.27 mi (6,883.61 km) |
| Somerset to Ostrow Mazowiecka | 4,298.69 mi (6,918.07 km) |
| Somerset to Ostrow Wielkopolski | 4,189.68 mi (6,742.63 km) |
| Somerset to Ostrowiec Swietokrzyski | 4,348.12 mi (6,997.62 km) |
| Somerset to Ostrzeszow | 4,201.95 mi (6,762.39 km) |
| Somerset to Oswiecim | 4,298.60 mi (6,917.93 km) |
| Somerset to Otwock | 4,300.44 mi (6,920.88 km) |
| Somerset to Ozarow Mazowiecki | 4,279.93 mi (6,887.88 km) |
| Somerset to Ozimek | 4,238.03 mi (6,820.45 km) |
| Somerset to Ozorkow | 4,233.23 mi (6,812.72 km) |
| Somerset to Pabianice | 4,247.93 mi (6,836.38 km) |
