| Willebroek to Oegstgeest | 77.27 mi (124.35 km) |
| Willebroek to Oirschot | 50.23 mi (80.84 km) |
| Willebroek to Oisterwijk | 50.68 mi (81.56 km) |
| Willebroek to Oldebroek | 115.90 mi (186.53 km) |
| Willebroek to Oldenzaal | 139.78 mi (224.96 km) |
| Willebroek to Ommen | 133.08 mi (214.17 km) |
| Willebroek to Oosterend | 152.07 mi (244.74 km) |
| Willebroek to Oosterhout | 45.09 mi (72.57 km) |
| Willebroek to Oosterwolde | 156.06 mi (251.16 km) |
| Willebroek to Oostzaan | 96.97 mi (156.06 km) |
| Willebroek to Opmeer | 115.56 mi (185.97 km) |
| Willebroek to Oss | 69.24 mi (111.44 km) |
| Willebroek to Oud-Beijerland | 51.84 mi (83.43 km) |
| Willebroek to Oudenbosch | 36.73 mi (59.12 km) |
| Willebroek to Oudewater | 69.07 mi (111.15 km) |
