| Cities | Distance |
|---|---|
| Castricum to Oegstgeest | 26.70 mi (42.98 km) |
| Castricum to Oirschot | 77.38 mi (124.53 km) |
| Castricum to Oisterwijk | 70.53 mi (113.50 km) |
| Castricum to Oldebroek | 52.33 mi (84.22 km) |
| Castricum to Oldenzaal | 96.83 mi (155.83 km) |
| Castricum to Ommen | 73.59 mi (118.42 km) |
| Castricum to Oosterend | 66.37 mi (106.81 km) |
| Castricum to Oosterhout | 63.18 mi (101.68 km) |
| Castricum to Oosterwolde | 74.42 mi (119.76 km) |
| Castricum to Oostzaan | 12.17 mi (19.58 km) |
| Castricum to Opmeer | 15.77 mi (25.37 km) |
| Castricum to Oss | 65.02 mi (104.63 km) |
| Castricum to Oud-Beijerland | 51.91 mi (83.54 km) |
| Castricum to Oudenbosch | 66.66 mi (107.28 km) |
| Castricum to Oudewater | 37.80 mi (60.84 km) |