| Rianxo to Oberkirch | 909.94 mi (1,464.41 km) |
| Rianxo to Obernburg am Main | 987.85 mi (1,589.78 km) |
| Rianxo to Obernkirchen | 1,064.32 mi (1,712.86 km) |
| Rianxo to Oberschleissheim | 1,057.09 mi (1,701.22 km) |
| Rianxo to Oberstdorf | 985.70 mi (1,586.33 km) |
| Rianxo to Obertraubling | 1,096.17 mi (1,764.11 km) |
| Rianxo to Obertshausen | 981.71 mi (1,579.90 km) |
| Rianxo to Oberursel | 975.44 mi (1,569.83 km) |
| Rianxo to Ochsenfurt | 1,021.14 mi (1,643.37 km) |
| Rianxo to Ochsenhausen | 981.81 mi (1,580.07 km) |
| Rianxo to Ochtrup | 993.90 mi (1,599.52 km) |
| Rianxo to Odenthal | 946.65 mi (1,523.48 km) |
| Rianxo to Oelde | 1,013.60 mi (1,631.24 km) |
| Rianxo to Oelsnitz | 1,127.05 mi (1,813.81 km) |
| Rianxo to Oer-Erkenschwick | 974.09 mi (1,567.65 km) |
