| Den Helder to Oegstgeest | 53.17 mi (85.57 km) |
| Den Helder to Oirschot | 101.73 mi (163.72 km) |
| Den Helder to Oisterwijk | 95.20 mi (153.21 km) |
| Den Helder to Oldebroek | 58.60 mi (94.31 km) |
| Den Helder to Oldenzaal | 100.99 mi (162.53 km) |
| Den Helder to Ommen | 75.45 mi (121.42 km) |
| Den Helder to Oosterend | 54.99 mi (88.50 km) |
| Den Helder to Oosterhout | 89.26 mi (143.65 km) |
| Den Helder to Oosterwolde | 64.27 mi (103.43 km) |
| Den Helder to Oostzaan | 34.99 mi (56.32 km) |
| Den Helder to Opmeer | 18.15 mi (29.22 km) |
| Den Helder to Oss | 86.86 mi (139.78 km) |
| Den Helder to Oud-Beijerland | 78.55 mi (126.41 km) |
| Den Helder to Oudenbosch | 93.36 mi (150.25 km) |
| Den Helder to Oudewater | 63.52 mi (102.23 km) |
