| Harpenden to Culpeper (Virginia) | 3,707.71 mi (5,966.99 km) |
| Harpenden to Culver City (California) | 5,426.58 mi (8,733.23 km) |
| Harpenden to Cumberland (Maryland) | 3,684.56 mi (5,929.72 km) |
| Harpenden to Cupertino (California) | 5,347.49 mi (8,605.96 km) |
| Harpenden to Cutler Bay (Florida) | 4,430.94 mi (7,130.90 km) |
| Harpenden to Cutlerville (Michigan) | 3,810.39 mi (6,132.23 km) |
| Harpenden to Cuyahoga Falls (Ohio) | 3,725.88 mi (5,996.22 km) |
| Harpenden to Cypress (California) | 5,425.95 mi (8,732.22 km) |
| Harpenden to Cypress Gardens (Florida) | 4,364.76 mi (7,024.41 km) |
| Harpenden to Cypress Lake (Florida) | 4,447.78 mi (7,158.01 km) |
| Harpenden to D'Iberville (Mississippi) | 4,536.89 mi (7,301.42 km) |
| Harpenden to Dakota Ridge (Colorado) | 4,676.34 mi (7,525.84 km) |
| Harpenden to Dale City (Virginia) | 3,673.10 mi (5,911.28 km) |
| Harpenden to Dallas (Georgia) | 4,200.91 mi (6,760.72 km) |
| Harpenden to Dallas (Oregon) | 4,941.76 mi (7,953.00 km) |
