| Harpenden to Corato | 1,080.79 mi (1,739.36 km) |
| Harpenden to Corbetta | 608.69 mi (979.59 km) |
| Harpenden to Corciano | 839.30 mi (1,350.72 km) |
| Harpenden to Cordenons | 715.25 mi (1,151.09 km) |
| Harpenden to Cori | 939.79 mi (1,512.45 km) |
| Harpenden to Coriano | 806.75 mi (1,298.34 km) |
| Harpenden to Corigliano Calabro | 1,167.10 mi (1,878.27 km) |
| Harpenden to Corleone | 1,172.01 mi (1,886.17 km) |
| Harpenden to Cormano | 612.30 mi (985.41 km) |
| Harpenden to Cornaredo | 610.64 mi (982.73 km) |
| Harpenden to Cornate d'Adda | 616.92 mi (992.84 km) |
| Harpenden to Cornedo Vicentino | 682.81 mi (1,098.87 km) |
| Harpenden to Correggio | 705.00 mi (1,134.59 km) |
| Harpenden to Corridonia | 874.24 mi (1,406.96 km) |
| Harpenden to Corsico | 616.77 mi (992.59 km) |
