| Risca to Culpeper (Virginia) | 3,600.25 mi (5,794.04 km) |
| Risca to Culver City (California) | 5,347.24 mi (8,605.55 km) |
| Risca to Cumberland (Maryland) | 3,578.51 mi (5,759.06 km) |
| Risca to Cupertino (California) | 5,275.12 mi (8,489.49 km) |
| Risca to Cutler Bay (Florida) | 4,316.97 mi (6,947.50 km) |
| Risca to Cutlerville (Michigan) | 3,711.72 mi (5,973.43 km) |
| Risca to Cuyahoga Falls (Ohio) | 3,622.85 mi (5,830.42 km) |
| Risca to Cypress (California) | 5,346.06 mi (8,603.65 km) |
| Risca to Cypress Gardens (Florida) | 4,252.49 mi (6,843.72 km) |
| Risca to Cypress Lake (Florida) | 4,334.90 mi (6,976.34 km) |
| Risca to D'Iberville (Mississippi) | 4,429.93 mi (7,129.28 km) |
| Risca to Dakota Ridge (Colorado) | 4,589.36 mi (7,385.87 km) |
| Risca to Dale City (Virginia) | 3,565.42 mi (5,737.98 km) |
| Risca to Dallas (Georgia) | 4,093.89 mi (6,588.47 km) |
| Risca to Dallas (Oregon) | 4,878.16 mi (7,850.64 km) |
