| Castellbisbal to Oerlinghausen | 790.11 mi (1,271.56 km) |
| Castellbisbal to Oestrich-Winkel | 656.00 mi (1,055.73 km) |
| Castellbisbal to Offenburg | 563.39 mi (906.70 km) |
| Castellbisbal to Oftersheim | 631.88 mi (1,016.91 km) |
| Castellbisbal to Ohrdruf | 768.80 mi (1,237.27 km) |
| Castellbisbal to Ohringen | 645.87 mi (1,039.43 km) |
| Castellbisbal to Olbernhau | 834.29 mi (1,342.66 km) |
| Castellbisbal to Olching | 650.97 mi (1,047.64 km) |
| Castellbisbal to Oldenburg | 856.55 mi (1,378.49 km) |
| Castellbisbal to Oldenburg in Holstein | 975.48 mi (1,569.89 km) |
| Castellbisbal to Olfen | 752.02 mi (1,210.27 km) |
| Castellbisbal to Olpe | 715.43 mi (1,151.37 km) |
| Castellbisbal to Olsberg | 748.46 mi (1,204.53 km) |
| Castellbisbal to Oranienburg | 939.51 mi (1,511.99 km) |
| Castellbisbal to Ortenberg | 700.65 mi (1,127.59 km) |
