| Castricum to Ukiah (California) | 5,374.16 mi (8,648.87 km) |
| Castricum to Union (Missouri) | 4,385.71 mi (7,058.12 km) |
| Castricum to Union City (California) | 5,434.93 mi (8,746.67 km) |
| Castricum to Union City (Georgia) | 4,387.98 mi (7,061.77 km) |
| Castricum to Union City (New Jersey) | 3,627.97 mi (5,838.66 km) |
| Castricum to Union City (Tennessee) | 4,416.07 mi (7,106.98 km) |
| Castricum to Union Hill-Novelty Hill (Washington) | 4,835.18 mi (7,781.47 km) |
| Castricum to Union Park (Florida) | 4,512.21 mi (7,261.70 km) |
| Castricum to Uniondale (New York) | 3,613.02 mi (5,814.59 km) |
| Castricum to Universal City (Texas) | 5,124.59 mi (8,247.24 km) |
| Castricum to University (Florida) | 4,585.89 mi (7,380.27 km) |
| Castricum to University City (Missouri) | 4,350.02 mi (7,000.68 km) |
| Castricum to University Heights (Ohio) | 3,883.69 mi (6,250.19 km) |
| Castricum to University of California-Santa Barbara (California) | 5,564.64 mi (8,955.43 km) |
| Castricum to University Park (Texas) | 4,890.64 mi (7,870.72 km) |
