| Highgate to Oberkirch | 420.73 mi (677.11 km) |
| Highgate to Obernburg am Main | 423.25 mi (681.15 km) |
| Highgate to Obernkirchen | 397.36 mi (639.48 km) |
| Highgate to Oberschleissheim | 568.56 mi (915.01 km) |
| Highgate to Oberstdorf | 548.38 mi (882.54 km) |
| Highgate to Obertraubling | 571.94 mi (920.44 km) |
| Highgate to Obertshausen | 405.17 mi (652.06 km) |
| Highgate to Oberursel | 391.47 mi (630.01 km) |
| Highgate to Ochsenfurt | 466.55 mi (750.84 km) |
| Highgate to Ochsenhausen | 510.14 mi (820.99 km) |
| Highgate to Ochtrup | 315.71 mi (508.08 km) |
| Highgate to Odenthal | 315.74 mi (508.14 km) |
| Highgate to Oelde | 355.45 mi (572.05 km) |
| Highgate to Oelsnitz | 540.64 mi (870.08 km) |
| Highgate to Oer-Erkenschwick | 317.25 mi (510.57 km) |
