| Castricum to Rockville (Maryland) | 3,828.72 mi (6,161.72 km) |
| Castricum to Rockville Centre (New York) | 3,617.16 mi (5,821.26 km) |
| Castricum to Rockwall (Texas) | 4,874.02 mi (7,843.98 km) |
| Castricum to Rocky Mount (North Carolina) | 4,003.46 mi (6,442.94 km) |
| Castricum to Rocky Point (New York) | 3,577.16 mi (5,756.89 km) |
| Castricum to Rocky River (Ohio) | 3,896.84 mi (6,271.35 km) |
| Castricum to Roessleville (New York) | 3,531.86 mi (5,683.98 km) |
| Castricum to Rogers (Arkansas) | 4,610.63 mi (7,420.09 km) |
| Castricum to Rogers (Minnesota) | 4,137.70 mi (6,658.99 km) |
| Castricum to Rohnert Park (California) | 5,408.54 mi (8,704.20 km) |
| Castricum to Rolla (Missouri) | 4,439.03 mi (7,143.93 km) |
| Castricum to Rolling Meadows (Illinois) | 4,096.13 mi (6,592.08 km) |
| Castricum to Roma (Texas) | 5,322.14 mi (8,565.16 km) |
| Castricum to Rome (Georgia) | 4,378.22 mi (7,046.07 km) |
| Castricum to Rome (New York) | 3,573.77 mi (5,751.43 km) |
