| Castrolibero to Oerlinghausen | 945.53 mi (1,521.68 km) |
| Castrolibero to Oestrich-Winkel | 839.81 mi (1,351.54 km) |
| Castrolibero to Offenburg | 753.40 mi (1,212.48 km) |
| Castrolibero to Oftersheim | 789.07 mi (1,269.89 km) |
| Castrolibero to Ohrdruf | 838.32 mi (1,349.14 km) |
| Castrolibero to Ohringen | 758.37 mi (1,220.48 km) |
| Castrolibero to Olbernhau | 796.46 mi (1,281.78 km) |
| Castrolibero to Olching | 660.03 mi (1,062.22 km) |
| Castrolibero to Oldenburg | 1,027.26 mi (1,653.22 km) |
| Castrolibero to Oldenburg in Holstein | 1,064.58 mi (1,713.28 km) |
| Castrolibero to Olfen | 955.57 mi (1,537.85 km) |
| Castrolibero to Olpe | 903.95 mi (1,454.77 km) |
| Castrolibero to Olsberg | 910.78 mi (1,465.76 km) |
| Castrolibero to Oranienburg | 939.06 mi (1,511.27 km) |
| Castrolibero to Ortenberg | 838.28 mi (1,349.08 km) |
