| Harpenden to Chesterfield | 107.91 mi (173.67 km) |
| Harpenden to Chichester | 70.24 mi (113.04 km) |
| Harpenden to Chigwell | 22.63 mi (36.41 km) |
| Harpenden to Childwall | 152.09 mi (244.77 km) |
| Harpenden to Chilwell | 84.54 mi (136.05 km) |
| Harpenden to Chingford | 20.49 mi (32.98 km) |
| Harpenden to Chippenham | 79.58 mi (128.06 km) |
| Harpenden to Chislehurst | 33.48 mi (53.89 km) |
| Harpenden to Choppington | 235.56 mi (379.10 km) |
| Harpenden to Chorley | 158.66 mi (255.34 km) |
| Harpenden to Chorleywood | 13.39 mi (21.56 km) |
| Harpenden to Christchurch | 97.23 mi (156.47 km) |
| Harpenden to Churchdown | 77.70 mi (125.04 km) |
| Harpenden to Cinderford | 91.67 mi (147.53 km) |
| Harpenden to Cirencester | 69.41 mi (111.71 km) |
