| Ruislip to Oberkirch | 431.97 mi (695.19 km) |
| Ruislip to Obernburg am Main | 435.39 mi (700.70 km) |
| Ruislip to Obernkirchen | 409.47 mi (658.98 km) |
| Ruislip to Oberschleissheim | 580.37 mi (934.01 km) |
| Ruislip to Oberstdorf | 559.54 mi (900.48 km) |
| Ruislip to Obertraubling | 584.05 mi (939.94 km) |
| Ruislip to Obertshausen | 417.37 mi (671.70 km) |
| Ruislip to Oberursel | 403.70 mi (649.69 km) |
| Ruislip to Ochsenfurt | 478.71 mi (770.41 km) |
| Ruislip to Ochsenhausen | 521.57 mi (839.39 km) |
| Ruislip to Ochtrup | 327.81 mi (527.56 km) |
| Ruislip to Odenthal | 328.11 mi (528.05 km) |
| Ruislip to Oelde | 367.72 mi (591.80 km) |
| Ruislip to Oelsnitz | 553.01 mi (889.99 km) |
| Ruislip to Oer-Erkenschwick | 329.58 mi (530.41 km) |
