| Castricum to Cicero (Illinois) | 4,097.73 mi (6,594.66 km) |
| Castricum to Cimarron Hills (Colorado) | 4,840.48 mi (7,790.00 km) |
| Castricum to Cincinnati (Ohio) | 4,109.22 mi (6,613.15 km) |
| Castricum to Cinco Ranch (Texas) | 5,019.44 mi (8,078.01 km) |
| Castricum to Circleville (Ohio) | 4,026.96 mi (6,480.76 km) |
| Castricum to Citrus (California) | 5,524.59 mi (8,890.96 km) |
| Castricum to Citrus Heights (California) | 5,349.78 mi (8,609.64 km) |
| Castricum to Citrus Park (Florida) | 4,591.32 mi (7,389.02 km) |
| Castricum to Claiborne (Louisiana) | 4,736.20 mi (7,622.17 km) |
| Castricum to Claremont (California) | 5,518.82 mi (8,881.69 km) |
| Castricum to Claremont (New Hampshire) | 3,445.03 mi (5,544.24 km) |
| Castricum to Claremore (Oklahoma) | 4,663.53 mi (7,505.23 km) |
| Castricum to Clarksburg (Maryland) | 3,826.40 mi (6,157.99 km) |
| Castricum to Clarksburg (West Virginia) | 3,942.35 mi (6,344.60 km) |
| Castricum to Clarksdale (Mississippi) | 4,588.21 mi (7,384.01 km) |
