| Castricum to Cookeville (Tennessee) | 4,295.88 mi (6,913.55 km) |
| Castricum to Coolidge (Arizona) | 5,395.45 mi (8,683.14 km) |
| Castricum to Coon Rapids (Minnesota) | 4,129.13 mi (6,645.19 km) |
| Castricum to Cooper City (Florida) | 4,603.74 mi (7,409.01 km) |
| Castricum to Coos Bay (Oregon) | 5,145.46 mi (8,280.82 km) |
| Castricum to Copiague (New York) | 3,607.17 mi (5,805.17 km) |
| Castricum to Coppell (Texas) | 4,891.76 mi (7,872.52 km) |
| Castricum to Copperas Cove (Texas) | 5,025.01 mi (8,086.98 km) |
| Castricum to Coral Gables (Florida) | 4,620.94 mi (7,436.69 km) |
| Castricum to Coral Springs (Florida) | 4,591.02 mi (7,388.53 km) |
| Castricum to Coral Terrace (Florida) | 4,620.09 mi (7,435.32 km) |
| Castricum to Coralville (Iowa) | 4,242.87 mi (6,828.23 km) |
| Castricum to Coram (New York) | 3,582.37 mi (5,765.27 km) |
| Castricum to Corcoran (California) | 5,456.95 mi (8,782.11 km) |
| Castricum to Cordele (Georgia) | 4,440.05 mi (7,145.58 km) |
