| Portes-les-Valence to Oegstgeest | 505.42 mi (813.39 km) |
| Portes-les-Valence to Oirschot | 458.27 mi (737.52 km) |
| Portes-les-Valence to Oisterwijk | 463.85 mi (746.50 km) |
| Portes-les-Valence to Oldebroek | 525.56 mi (845.81 km) |
| Portes-les-Valence to Oldenzaal | 522.75 mi (841.28 km) |
| Portes-les-Valence to Ommen | 532.73 mi (857.34 km) |
| Portes-les-Valence to Oosterend | 564.32 mi (908.18 km) |
| Portes-les-Valence to Oosterhout | 467.75 mi (752.77 km) |
| Portes-les-Valence to Oosterwolde | 564.47 mi (908.42 km) |
| Portes-les-Valence to Oostzaan | 522.35 mi (840.63 km) |
| Portes-les-Valence to Opmeer | 540.78 mi (870.31 km) |
| Portes-les-Valence to Oss | 477.19 mi (767.96 km) |
| Portes-les-Valence to Oud-Beijerland | 480.24 mi (772.87 km) |
| Portes-les-Valence to Oudenbosch | 464.31 mi (747.23 km) |
| Portes-les-Valence to Oudewater | 493.56 mi (794.31 km) |
