| Siran to Cascais | 2,559.42 mi (4,118.99 km) |
| Siran to Castelo Branco | 2,438.74 mi (3,924.77 km) |
| Siran to Castro Daire | 2,440.87 mi (3,928.20 km) |
| Siran to Celorico de Basto | 2,435.92 mi (3,920.23 km) |
| Siran to Chamusca | 2,498.10 mi (4,020.31 km) |
| Siran to Chaves | 2,403.51 mi (3,868.07 km) |
| Siran to Cinfaes | 2,447.47 mi (3,938.82 km) |
| Siran to Coimbra | 2,478.53 mi (3,988.81 km) |
| Siran to Condeixa-a-Nova | 2,483.91 mi (3,997.47 km) |
| Siran to Corroios | 2,547.62 mi (4,100.00 km) |
| Siran to Coruche | 2,508.39 mi (4,036.87 km) |
| Siran to Costa de Caparica | 2,551.33 mi (4,105.97 km) |
| Siran to Covilha | 2,429.99 mi (3,910.70 km) |
| Siran to Eiras | 2,477.68 mi (3,987.44 km) |
| Siran to Elvas | 2,439.61 mi (3,926.17 km) |
