| Siran to Benavente | 2,522.18 mi (4,059.05 km) |
| Siran to Bombarral | 2,534.10 mi (4,078.24 km) |
| Siran to Bougado | 2,464.80 mi (3,966.72 km) |
| Siran to Braga | 2,454.21 mi (3,949.66 km) |
| Siran to Braganca | 2,366.72 mi (3,808.87 km) |
| Siran to Cabeceiras de Basto | 2,434.25 mi (3,917.55 km) |
| Siran to Cacem | 2,552.35 mi (4,107.61 km) |
| Siran to Cadaval | 2,531.99 mi (4,074.85 km) |
| Siran to Caldas da Rainha | 2,530.26 mi (4,072.06 km) |
| Siran to Calheta | 3,118.10 mi (5,018.10 km) |
| Siran to Camara de Lobos | 3,109.25 mi (5,003.85 km) |
| Siran to Canico | 3,104.24 mi (4,995.80 km) |
| Siran to Cantanhede | 2,484.36 mi (3,998.18 km) |
| Siran to Carregal do Sal | 2,452.62 mi (3,947.11 km) |
| Siran to Cartaxo | 2,517.52 mi (4,051.56 km) |
