| Valongo to Nuth | 960.13 mi (1,545.18 km) |
| Valongo to Oegstgeest | 974.40 mi (1,568.15 km) |
| Valongo to Oirschot | 967.09 mi (1,556.38 km) |
| Valongo to Oisterwijk | 967.79 mi (1,557.50 km) |
| Valongo to Oldebroek | 1,030.38 mi (1,658.24 km) |
| Valongo to Oldenzaal | 1,056.63 mi (1,700.48 km) |
| Valongo to Ommen | 1,049.46 mi (1,688.94 km) |
| Valongo to Oosterend | 1,061.92 mi (1,708.99 km) |
| Valongo to Oosterhout | 959.86 mi (1,544.74 km) |
| Valongo to Oosterwolde | 1,067.99 mi (1,718.76 km) |
| Valongo to Oostzaan | 999.05 mi (1,607.82 km) |
| Valongo to Opmeer | 1,014.26 mi (1,632.30 km) |
| Valongo to Oss | 986.35 mi (1,587.38 km) |
| Valongo to Oud-Beijerland | 954.29 mi (1,535.79 km) |
| Valongo to Oudenbosch | 946.99 mi (1,524.03 km) |
