| Alton to Cascais | 952.67 mi (1,533.17 km) |
| Alton to Castelo Branco | 843.57 mi (1,357.60 km) |
| Alton to Castro Daire | 782.04 mi (1,258.57 km) |
| Alton to Celorico de Basto | 752.76 mi (1,211.45 km) |
| Alton to Chamusca | 892.19 mi (1,435.84 km) |
| Alton to Chaves | 719.21 mi (1,157.46 km) |
| Alton to Cinfaes | 773.46 mi (1,244.76 km) |
| Alton to Coimbra | 836.01 mi (1,345.42 km) |
| Alton to Condeixa-a-Nova | 843.47 mi (1,357.43 km) |
| Alton to Corroios | 952.66 mi (1,533.16 km) |
| Alton to Coruche | 918.35 mi (1,477.94 km) |
| Alton to Costa de Caparica | 952.47 mi (1,532.85 km) |
| Alton to Covilha | 813.29 mi (1,308.86 km) |
| Alton to Eiras | 833.93 mi (1,342.08 km) |
| Alton to Elvas | 899.86 mi (1,448.19 km) |
