| Harpenden to Cascais | 1,006.04 mi (1,619.07 km) |
| Harpenden to Castelo Branco | 896.72 mi (1,443.13 km) |
| Harpenden to Castro Daire | 835.39 mi (1,344.43 km) |
| Harpenden to Celorico de Basto | 806.14 mi (1,297.35 km) |
| Harpenden to Chamusca | 945.50 mi (1,521.64 km) |
| Harpenden to Chaves | 772.56 mi (1,243.32 km) |
| Harpenden to Cinfaes | 826.84 mi (1,330.67 km) |
| Harpenden to Coimbra | 889.37 mi (1,431.30 km) |
| Harpenden to Condeixa-a-Nova | 896.83 mi (1,443.32 km) |
| Harpenden to Corroios | 1,006.01 mi (1,619.02 km) |
| Harpenden to Coruche | 971.64 mi (1,563.70 km) |
| Harpenden to Costa de Caparica | 1,005.83 mi (1,618.73 km) |
| Harpenden to Covilha | 866.50 mi (1,394.50 km) |
| Harpenden to Eiras | 887.29 mi (1,427.96 km) |
| Harpenden to Elvas | 952.74 mi (1,533.28 km) |
