| Ondokuzmayis to Oberkirch | 1,441.61 mi (2,320.05 km) |
| Ondokuzmayis to Obernburg am Main | 1,412.71 mi (2,273.54 km) |
| Ondokuzmayis to Obernkirchen | 1,462.21 mi (2,353.20 km) |
| Ondokuzmayis to Oberschleissheim | 1,280.95 mi (2,061.49 km) |
| Ondokuzmayis to Oberstdorf | 1,329.34 mi (2,139.36 km) |
| Ondokuzmayis to Obertraubling | 1,265.94 mi (2,037.34 km) |
| Ondokuzmayis to Obertshausen | 1,429.76 mi (2,300.98 km) |
| Ondokuzmayis to Oberursel | 1,443.07 mi (2,322.39 km) |
| Ondokuzmayis to Ochsenfurt | 1,369.45 mi (2,203.92 km) |
| Ondokuzmayis to Ochsenhausen | 1,351.81 mi (2,175.52 km) |
| Ondokuzmayis to Ochtrup | 1,538.21 mi (2,475.51 km) |
| Ondokuzmayis to Odenthal | 1,519.19 mi (2,444.90 km) |
| Ondokuzmayis to Oelde | 1,491.58 mi (2,400.47 km) |
| Ondokuzmayis to Oelsnitz | 1,295.45 mi (2,084.83 km) |
| Ondokuzmayis to Oer-Erkenschwick | 1,524.61 mi (2,453.63 km) |
