| Caldas de Reyes to Oberkirch | 904.05 mi (1,454.93 km) |
| Caldas de Reyes to Obernburg am Main | 982.50 mi (1,581.18 km) |
| Caldas de Reyes to Obernkirchen | 1,060.21 mi (1,706.24 km) |
| Caldas de Reyes to Oberschleissheim | 1,050.69 mi (1,690.92 km) |
| Caldas de Reyes to Oberstdorf | 979.00 mi (1,575.55 km) |
| Caldas de Reyes to Obertraubling | 1,090.05 mi (1,754.26 km) |
| Caldas de Reyes to Obertshausen | 976.53 mi (1,571.57 km) |
| Caldas de Reyes to Oberursel | 970.38 mi (1,561.67 km) |
| Caldas de Reyes to Ochsenfurt | 1,015.57 mi (1,634.40 km) |
| Caldas de Reyes to Ochsenhausen | 975.46 mi (1,569.86 km) |
| Caldas de Reyes to Ochtrup | 990.15 mi (1,593.49 km) |
| Caldas de Reyes to Odenthal | 942.30 mi (1,516.49 km) |
| Caldas de Reyes to Oelde | 1,009.46 mi (1,624.57 km) |
| Caldas de Reyes to Oelsnitz | 1,121.60 mi (1,805.04 km) |
| Caldas de Reyes to Oer-Erkenschwick | 970.04 mi (1,561.13 km) |
