| Castano Primo to Oegstgeest | 498.03 mi (801.49 km) |
| Castano Primo to Oirschot | 440.52 mi (708.95 km) |
| Castano Primo to Oisterwijk | 447.49 mi (720.16 km) |
| Castano Primo to Oldebroek | 494.03 mi (795.07 km) |
| Castano Primo to Oldenzaal | 474.84 mi (764.18 km) |
| Castano Primo to Ommen | 492.91 mi (793.26 km) |
| Castano Primo to Oosterend | 529.08 mi (851.47 km) |
| Castano Primo to Oosterhout | 457.17 mi (735.74 km) |
| Castano Primo to Oosterwolde | 525.96 mi (846.45 km) |
| Castano Primo to Oostzaan | 506.94 mi (815.85 km) |
| Castano Primo to Opmeer | 523.10 mi (841.85 km) |
| Castano Primo to Oss | 454.30 mi (731.13 km) |
| Castano Primo to Oud-Beijerland | 476.40 mi (766.68 km) |
| Castano Primo to Oudenbosch | 459.96 mi (740.23 km) |
| Castano Primo to Oudewater | 480.61 mi (773.47 km) |
