| Alpen to Obernburg am Main | 166.12 mi (267.34 km) |
| Alpen to Obernkirchen | 120.85 mi (194.49 km) |
| Alpen to Oberschleissheim | 321.33 mi (517.13 km) |
| Alpen to Oberstdorf | 333.67 mi (536.98 km) |
| Alpen to Obertraubling | 307.84 mi (495.43 km) |
| Alpen to Obertshausen | 145.32 mi (233.87 km) |
| Alpen to Oberursel | 130.67 mi (210.30 km) |
| Alpen to Ochsenfurt | 204.83 mi (329.65 km) |
| Alpen to Ochsenhausen | 286.33 mi (460.80 km) |
| Alpen to Ochtrup | 52.28 mi (84.14 km) |
| Alpen to Odenthal | 45.63 mi (73.43 km) |
| Alpen to Oelde | 72.35 mi (116.44 km) |
| Alpen to Oelsnitz | 258.49 mi (416.01 km) |
| Alpen to Oer-Erkenschwick | 32.02 mi (51.53 km) |
| Alpen to Oerlinghausen | 95.99 mi (154.49 km) |
