| Castricum to Oak Harbor (Washington) | 4,813.13 mi (7,745.99 km) |
| Castricum to Oak Hills (Oregon) | 4,981.80 mi (8,017.42 km) |
| Castricum to Oak Lawn (Illinois) | 4,103.88 mi (6,604.56 km) |
| Castricum to Oak Park (California) | 5,546.49 mi (8,926.21 km) |
| Castricum to Oak Park (Illinois) | 4,096.76 mi (6,593.09 km) |
| Castricum to Oak Park (Michigan) | 3,899.59 mi (6,275.79 km) |
| Castricum to Oak Ridge (Florida) | 4,524.34 mi (7,281.23 km) |
| Castricum to Oak Ridge (New Jersey) | 3,634.15 mi (5,848.60 km) |
| Castricum to Oak Ridge (Tennessee) | 4,258.25 mi (6,852.99 km) |
| Castricum to Oakdale (California) | 5,393.32 mi (8,679.71 km) |
| Castricum to Oakdale (Minnesota) | 4,126.68 mi (6,641.26 km) |
| Castricum to Oakland (California) | 5,429.09 mi (8,737.28 km) |
| Castricum to Oakland (New Jersey) | 3,624.15 mi (5,832.50 km) |
| Castricum to Oakland Park (Florida) | 4,591.44 mi (7,389.22 km) |
| Castricum to Oakleaf Plantation (Florida) | 4,454.12 mi (7,168.22 km) |
