| Alella to Oberkirch | 562.09 mi (904.59 km) |
| Alella to Obernburg am Main | 663.93 mi (1,068.50 km) |
| Alella to Obernkirchen | 810.08 mi (1,303.70 km) |
| Alella to Oberschleissheim | 650.16 mi (1,046.33 km) |
| Alella to Oberstdorf | 566.90 mi (912.33 km) |
| Alella to Obertraubling | 703.93 mi (1,132.87 km) |
| Alella to Obertshausen | 670.18 mi (1,078.55 km) |
| Alella to Oberursel | 672.75 mi (1,082.69 km) |
| Alella to Ochsenfurt | 676.48 mi (1,088.69 km) |
| Alella to Ochsenhausen | 588.74 mi (947.48 km) |
| Alella to Ochtrup | 774.85 mi (1,247.01 km) |
| Alella to Odenthal | 697.70 mi (1,122.84 km) |
| Alella to Oelde | 765.71 mi (1,232.29 km) |
| Alella to Oelsnitz | 776.25 mi (1,249.26 km) |
| Alella to Oer-Erkenschwick | 739.10 mi (1,189.46 km) |
