| Friendly to Oberkirch | 4,082.64 mi (6,570.37 km) |
| Friendly to Obernburg am Main | 4,087.66 mi (6,578.46 km) |
| Friendly to Obernkirchen | 4,017.59 mi (6,465.69 km) |
| Friendly to Oberschleissheim | 4,234.67 mi (6,815.04 km) |
| Friendly to Oberstdorf | 4,207.98 mi (6,772.08 km) |
| Friendly to Obertraubling | 4,236.37 mi (6,817.78 km) |
| Friendly to Obertshausen | 4,068.65 mi (6,547.85 km) |
| Friendly to Oberursel | 4,054.39 mi (6,524.91 km) |
| Friendly to Ochsenfurt | 4,130.61 mi (6,647.58 km) |
| Friendly to Ochsenhausen | 4,173.67 mi (6,716.87 km) |
| Friendly to Ochtrup | 3,944.20 mi (6,347.58 km) |
| Friendly to Odenthal | 3,972.68 mi (6,393.41 km) |
| Friendly to Oelde | 3,991.80 mi (6,424.18 km) |
| Friendly to Oelsnitz | 4,190.97 mi (6,744.72 km) |
| Friendly to Oer-Erkenschwick | 3,961.58 mi (6,375.55 km) |
