| Castrolibero to Oberkirch | 753.13 mi (1,212.05 km) |
| Castrolibero to Obernburg am Main | 804.94 mi (1,295.43 km) |
| Castrolibero to Obernkirchen | 956.46 mi (1,539.28 km) |
| Castrolibero to Oberschleissheim | 658.76 mi (1,060.18 km) |
| Castrolibero to Oberstdorf | 632.89 mi (1,018.54 km) |
| Castrolibero to Obertraubling | 695.77 mi (1,119.73 km) |
| Castrolibero to Obertshausen | 825.23 mi (1,328.08 km) |
| Castrolibero to Oberursel | 838.98 mi (1,350.21 km) |
| Castrolibero to Ochsenfurt | 774.69 mi (1,246.74 km) |
| Castrolibero to Ochsenhausen | 680.26 mi (1,094.77 km) |
| Castrolibero to Ochtrup | 989.01 mi (1,591.66 km) |
| Castrolibero to Odenthal | 920.93 mi (1,482.10 km) |
| Castrolibero to Oelde | 947.03 mi (1,524.09 km) |
| Castrolibero to Oelsnitz | 791.65 mi (1,274.03 km) |
| Castrolibero to Oer-Erkenschwick | 953.95 mi (1,535.24 km) |
