| Harpenden to Cavaillon | 605.00 mi (973.66 km) |
| Harpenden to Cebazat | 442.28 mi (711.78 km) |
| Harpenden to Cenon | 480.94 mi (774.00 km) |
| Harpenden to Cergy | 219.60 mi (353.41 km) |
| Harpenden to Cernay | 434.88 mi (699.87 km) |
| Harpenden to Cesson | 259.84 mi (418.18 km) |
| Harpenden to Cesson-Sevigne | 261.39 mi (420.66 km) |
| Harpenden to Cestas | 488.94 mi (786.87 km) |
| Harpenden to Chalette-sur-Loing | 296.62 mi (477.37 km) |
| Harpenden to Challans | 350.23 mi (563.64 km) |
| Harpenden to Chalon-sur-Saone | 419.43 mi (675.00 km) |
| Harpenden to Chalons-en-Champagne | 286.66 mi (461.33 km) |
| Harpenden to Chamalieres | 445.52 mi (717.00 km) |
| Harpenden to Chambery | 517.21 mi (832.38 km) |
| Harpenden to Chambly | 215.86 mi (347.40 km) |
