| Santa Eulalia del Rio to Oberkirch | 735.60 mi (1,183.84 km) |
| Santa Eulalia del Rio to Obernburg am Main | 837.73 mi (1,348.19 km) |
| Santa Eulalia del Rio to Obernkirchen | 986.83 mi (1,588.15 km) |
| Santa Eulalia del Rio to Oberschleissheim | 811.99 mi (1,306.78 km) |
| Santa Eulalia del Rio to Oberstdorf | 729.01 mi (1,173.22 km) |
| Santa Eulalia del Rio to Obertraubling | 867.21 mi (1,395.64 km) |
| Santa Eulalia del Rio to Obertshausen | 844.94 mi (1,359.79 km) |
| Santa Eulalia del Rio to Oberursel | 848.14 mi (1,364.94 km) |
| Santa Eulalia del Rio to Ochsenfurt | 847.83 mi (1,364.45 km) |
| Santa Eulalia del Rio to Ochsenhausen | 755.24 mi (1,215.44 km) |
| Santa Eulalia del Rio to Ochtrup | 952.80 mi (1,533.38 km) |
| Santa Eulalia del Rio to Odenthal | 875.37 mi (1,408.77 km) |
| Santa Eulalia del Rio to Oelde | 943.01 mi (1,517.64 km) |
| Santa Eulalia del Rio to Oelsnitz | 944.79 mi (1,520.50 km) |
| Santa Eulalia del Rio to Oer-Erkenschwick | 916.89 mi (1,475.59 km) |
