| Sidcup to Oberkirch | 406.74 mi (654.58 km) |
| Sidcup to Obernburg am Main | 410.71 mi (660.98 km) |
| Sidcup to Obernkirchen | 388.90 mi (625.88 km) |
| Sidcup to Oberschleissheim | 555.24 mi (893.57 km) |
| Sidcup to Oberstdorf | 534.32 mi (859.91 km) |
| Sidcup to Obertraubling | 559.29 mi (900.09 km) |
| Sidcup to Obertshausen | 392.83 mi (632.20 km) |
| Sidcup to Oberursel | 379.25 mi (610.34 km) |
| Sidcup to Ochsenfurt | 454.04 mi (730.71 km) |
| Sidcup to Ochsenhausen | 496.33 mi (798.77 km) |
| Sidcup to Ochtrup | 307.36 mi (494.65 km) |
| Sidcup to Odenthal | 304.58 mi (490.17 km) |
| Sidcup to Oelde | 346.12 mi (557.02 km) |
| Sidcup to Oelsnitz | 529.46 mi (852.08 km) |
| Sidcup to Oer-Erkenschwick | 307.47 mi (494.83 km) |
