| Harpenden to Busto Arsizio | 599.04 mi (964.06 km) |
| Harpenden to Busto Garolfo | 603.49 mi (971.23 km) |
| Harpenden to Cabras | 924.12 mi (1,487.23 km) |
| Harpenden to Cadelbosco di Sopra | 699.19 mi (1,125.23 km) |
| Harpenden to Cadoneghe | 711.34 mi (1,144.79 km) |
| Harpenden to Cagli | 829.64 mi (1,335.18 km) |
| Harpenden to Cagliari | 981.23 mi (1,579.13 km) |
| Harpenden to Cairo Montenotte | 647.74 mi (1,042.43 km) |
| Harpenden to Caivano | 1,021.68 mi (1,644.23 km) |
| Harpenden to Calcinaia | 757.02 mi (1,218.30 km) |
| Harpenden to Calcinato | 658.12 mi (1,059.15 km) |
| Harpenden to Calderara di Reno | 731.46 mi (1,177.17 km) |
| Harpenden to Caldogno | 688.70 mi (1,108.36 km) |
| Harpenden to Calenzano | 764.51 mi (1,230.36 km) |
| Harpenden to Calolziocorte | 608.25 mi (978.88 km) |
