| Harpenden to Cassina de' Pecchi | 620.47 mi (998.55 km) |
| Harpenden to Cassino | 976.80 mi (1,572.01 km) |
| Harpenden to Castagneto Carducci | 784.86 mi (1,263.11 km) |
| Harpenden to Castano Primo | 599.60 mi (964.96 km) |
| Harpenden to Castel Bolognese | 762.00 mi (1,226.33 km) |
| Harpenden to Castel Gandolfo | 926.05 mi (1,490.33 km) |
| Harpenden to Castel Goffredo | 668.11 mi (1,075.22 km) |
| Harpenden to Castel Maggiore | 734.80 mi (1,182.55 km) |
| Harpenden to Castel Mella | 647.13 mi (1,041.46 km) |
| Harpenden to Castel San Giorgio | 1,043.61 mi (1,679.52 km) |
| Harpenden to Castel San Giovanni | 646.90 mi (1,041.09 km) |
| Harpenden to Castel San Pietro Terme | 750.51 mi (1,207.83 km) |
| Harpenden to Castel Volturno | 1,004.01 mi (1,615.80 km) |
| Harpenden to Castelbuono | 1,187.39 mi (1,910.93 km) |
| Harpenden to Casteldaccia | 1,164.54 mi (1,874.15 km) |
