| Mairena del Alcor to Oberkirch | 1,037.71 mi (1,670.03 km) |
| Mairena del Alcor to Obernburg am Main | 1,134.44 mi (1,825.71 km) |
| Mairena del Alcor to Obernkirchen | 1,255.50 mi (2,020.53 km) |
| Mairena del Alcor to Oberschleissheim | 1,150.41 mi (1,851.41 km) |
| Mairena del Alcor to Oberstdorf | 1,068.30 mi (1,719.26 km) |
| Mairena del Alcor to Obertraubling | 1,201.15 mi (1,933.07 km) |
| Mairena del Alcor to Obertshausen | 1,135.62 mi (1,827.61 km) |
| Mairena del Alcor to Oberursel | 1,134.40 mi (1,825.64 km) |
| Mairena del Alcor to Ochsenfurt | 1,156.01 mi (1,860.42 km) |
| Mairena del Alcor to Ochsenhausen | 1,082.76 mi (1,742.53 km) |
| Mairena del Alcor to Ochtrup | 1,201.27 mi (1,933.26 km) |
| Mairena del Alcor to Odenthal | 1,135.15 mi (1,826.85 km) |
| Mairena del Alcor to Oelde | 1,206.12 mi (1,941.06 km) |
| Mairena del Alcor to Oelsnitz | 1,261.45 mi (2,030.11 km) |
| Mairena del Alcor to Oer-Erkenschwick | 1,171.79 mi (1,885.81 km) |
