| Siano to Arcozelo | 1,214.54 mi (1,954.62 km) |
| Siano to Arganil | 1,192.32 mi (1,918.86 km) |
| Siano to Arouca | 1,195.15 mi (1,923.40 km) |
| Siano to Arruda dos Vinhos | 1,261.97 mi (2,030.95 km) |
| Siano to Aveiro | 1,218.92 mi (1,961.67 km) |
| Siano to Aver-o-Mar | 1,218.56 mi (1,961.08 km) |
| Siano to Aves | 1,194.13 mi (1,921.77 km) |
| Siano to Azambuja | 1,250.21 mi (2,012.02 km) |
| Siano to Baiao | 1,182.31 mi (1,902.75 km) |
| Siano to Barcelos | 1,209.94 mi (1,947.22 km) |
| Siano to Barreiro | 1,267.18 mi (2,039.33 km) |
| Siano to Batalha | 1,238.24 mi (1,992.75 km) |
| Siano to Beja | 1,216.74 mi (1,958.16 km) |
| Siano to Belas | 1,276.07 mi (2,053.63 km) |
| Siano to Benavente | 1,248.30 mi (2,008.94 km) |
