| Killingworth to Oberkirch | 608.32 mi (978.99 km) |
| Killingworth to Obernburg am Main | 574.89 mi (925.19 km) |
| Killingworth to Obernkirchen | 476.42 mi (766.73 km) |
| Killingworth to Oberschleissheim | 730.18 mi (1,175.12 km) |
| Killingworth to Oberstdorf | 732.73 mi (1,179.21 km) |
| Killingworth to Obertraubling | 716.61 mi (1,153.27 km) |
| Killingworth to Obertshausen | 554.21 mi (891.91 km) |
| Killingworth to Oberursel | 539.46 mi (868.17 km) |
| Killingworth to Ochsenfurt | 614.32 mi (988.66 km) |
| Killingworth to Ochsenhausen | 687.94 mi (1,107.13 km) |
| Killingworth to Ochtrup | 407.77 mi (656.24 km) |
| Killingworth to Odenthal | 453.52 mi (729.87 km) |
| Killingworth to Oelde | 456.01 mi (733.87 km) |
| Killingworth to Oelsnitz | 655.23 mi (1,054.49 km) |
| Killingworth to Oer-Erkenschwick | 431.78 mi (694.89 km) |
