| Castricum to Culpeper (Virginia) | 3,890.88 mi (6,261.77 km) |
| Castricum to Culver City (California) | 5,546.17 mi (8,925.70 km) |
| Castricum to Cumberland (Maryland) | 3,864.43 mi (6,219.19 km) |
| Castricum to Cupertino (California) | 5,452.88 mi (8,775.55 km) |
| Castricum to Cutler Bay (Florida) | 4,630.19 mi (7,451.56 km) |
| Castricum to Cutlerville (Michigan) | 3,973.52 mi (6,394.76 km) |
| Castricum to Cuyahoga Falls (Ohio) | 3,898.78 mi (6,274.48 km) |
| Castricum to Cypress (California) | 5,546.68 mi (8,926.52 km) |
| Castricum to Cypress Gardens (Florida) | 4,559.42 mi (7,337.68 km) |
| Castricum to Cypress Lake (Florida) | 4,644.02 mi (7,473.83 km) |
| Castricum to D'Iberville (Mississippi) | 4,718.14 mi (7,593.11 km) |
| Castricum to Dakota Ridge (Colorado) | 4,813.11 mi (7,745.95 km) |
| Castricum to Dale City (Virginia) | 3,856.81 mi (6,206.93 km) |
| Castricum to Dallas (Georgia) | 4,382.59 mi (7,053.10 km) |
| Castricum to Dallas (Oregon) | 5,030.27 mi (8,095.43 km) |
