| Walton upon Thames to Oerlinghausen | 390.83 mi (628.98 km) |
| Walton upon Thames to Oestrich-Winkel | 380.26 mi (611.97 km) |
| Walton upon Thames to Offenburg | 422.18 mi (679.44 km) |
| Walton upon Thames to Oftersheim | 419.90 mi (675.76 km) |
| Walton upon Thames to Ohrdruf | 484.60 mi (779.88 km) |
| Walton upon Thames to Ohringen | 462.49 mi (744.31 km) |
| Walton upon Thames to Olbernhau | 598.56 mi (963.30 km) |
| Walton upon Thames to Olching | 566.82 mi (912.21 km) |
| Walton upon Thames to Oldenburg | 384.19 mi (618.29 km) |
| Walton upon Thames to Oldenburg in Holstein | 511.87 mi (823.77 km) |
| Walton upon Thames to Olfen | 335.58 mi (540.06 km) |
| Walton upon Thames to Olpe | 357.74 mi (575.73 km) |
| Walton upon Thames to Olsberg | 383.53 mi (617.24 km) |
| Walton upon Thames to Oranienburg | 586.46 mi (943.82 km) |
| Walton upon Thames to Ortenberg | 418.64 mi (673.74 km) |
