| Aci Catena to Oberkirch | 834.16 mi (1,342.45 km) |
| Aci Catena to Obernburg am Main | 896.34 mi (1,442.52 km) |
| Aci Catena to Obernkirchen | 1,054.29 mi (1,696.71 km) |
| Aci Catena to Oberschleissheim | 757.42 mi (1,218.95 km) |
| Aci Catena to Oberstdorf | 721.10 mi (1,160.50 km) |
| Aci Catena to Obertraubling | 799.18 mi (1,286.16 km) |
| Aci Catena to Obertshausen | 915.98 mi (1,474.14 km) |
| Aci Catena to Oberursel | 929.06 mi (1,495.18 km) |
| Aci Catena to Ochsenfurt | 869.76 mi (1,399.75 km) |
| Aci Catena to Ochsenhausen | 769.31 mi (1,238.09 km) |
| Aci Catena to Ochtrup | 1,079.86 mi (1,737.87 km) |
| Aci Catena to Odenthal | 1,007.77 mi (1,621.86 km) |
| Aci Catena to Oelde | 1,040.30 mi (1,674.19 km) |
| Aci Catena to Oelsnitz | 897.54 mi (1,444.45 km) |
| Aci Catena to Oer-Erkenschwick | 1,043.32 mi (1,679.07 km) |
