| Castricum to University Place (Washington) | 4,875.13 mi (7,845.76 km) |
| Castricum to Upland (California) | 5,517.66 mi (8,879.82 km) |
| Castricum to Upper Arlington (Ohio) | 4,011.83 mi (6,456.41 km) |
| Castricum to Upper Grand Lagoon (Florida) | 4,609.88 mi (7,418.89 km) |
| Castricum to Upper Montclair (New Jersey) | 3,631.13 mi (5,843.74 km) |
| Castricum to Urbana (Illinois) | 4,199.16 mi (6,757.90 km) |
| Castricum to Urbana (Maryland) | 3,824.55 mi (6,155.01 km) |
| Castricum to Urbana (Ohio) | 4,033.75 mi (6,491.69 km) |
| Castricum to Urbandale (Iowa) | 4,322.91 mi (6,957.05 km) |
| Castricum to Utica (New York) | 3,569.38 mi (5,744.36 km) |
| Castricum to Uvalde (Texas) | 5,197.23 mi (8,364.13 km) |
| Castricum to Vacaville (California) | 5,388.29 mi (8,671.61 km) |
| Castricum to Vadnais Heights (Minnesota) | 4,127.02 mi (6,641.80 km) |
| Castricum to Vail (Arizona) | 5,420.73 mi (8,723.82 km) |
| Castricum to Valdosta (Georgia) | 4,477.09 mi (7,205.18 km) |
