| Walton upon Thames to Oberkirch | 425.67 mi (685.05 km) |
| Walton upon Thames to Obernburg am Main | 431.98 mi (695.20 km) |
| Walton upon Thames to Obernkirchen | 411.21 mi (661.77 km) |
| Walton upon Thames to Oberschleissheim | 575.52 mi (926.21 km) |
| Walton upon Thames to Oberstdorf | 553.01 mi (889.98 km) |
| Walton upon Thames to Obertraubling | 580.41 mi (934.08 km) |
| Walton upon Thames to Obertshausen | 414.28 mi (666.71 km) |
| Walton upon Thames to Oberursel | 400.78 mi (645.00 km) |
| Walton upon Thames to Ochsenfurt | 475.32 mi (764.96 km) |
| Walton upon Thames to Ochsenhausen | 515.70 mi (829.94 km) |
| Walton upon Thames to Ochtrup | 329.64 mi (530.51 km) |
| Walton upon Thames to Odenthal | 326.70 mi (525.78 km) |
| Walton upon Thames to Oelde | 368.51 mi (593.06 km) |
| Walton upon Thames to Oelsnitz | 551.55 mi (887.63 km) |
| Walton upon Thames to Oer-Erkenschwick | 329.86 mi (530.86 km) |
