| Castellbisbal to Nuth | 678.15 mi (1,091.37 km) |
| Castellbisbal to Oegstgeest | 748.90 mi (1,205.24 km) |
| Castellbisbal to Oirschot | 710.10 mi (1,142.80 km) |
| Castellbisbal to Oisterwijk | 714.67 mi (1,150.15 km) |
| Castellbisbal to Oldebroek | 780.06 mi (1,255.39 km) |
| Castellbisbal to Oldenzaal | 784.13 mi (1,261.93 km) |
| Castellbisbal to Ommen | 790.51 mi (1,272.20 km) |
| Castellbisbal to Oosterend | 818.80 mi (1,317.74 km) |
| Castellbisbal to Oosterhout | 715.43 mi (1,151.38 km) |
| Castellbisbal to Oosterwolde | 820.41 mi (1,320.33 km) |
| Castellbisbal to Oostzaan | 769.13 mi (1,237.79 km) |
| Castellbisbal to Opmeer | 787.74 mi (1,267.75 km) |
| Castellbisbal to Oss | 730.26 mi (1,175.24 km) |
| Castellbisbal to Oud-Beijerland | 723.46 mi (1,164.30 km) |
| Castellbisbal to Oudenbosch | 708.96 mi (1,140.96 km) |
