| Siano to Santiago do Cacem | 1,259.76 mi (2,027.39 km) |
| Siano to Santo Andre | 1,261.74 mi (2,030.57 km) |
| Siano to Santo Tirso | 1,203.47 mi (1,936.80 km) |
| Siano to Sao Bras de Alportel | 1,235.05 mi (1,987.61 km) |
| Siano to Sao Felix da Marinha | 1,213.87 mi (1,953.53 km) |
| Siano to Sao Joao da Madeira | 1,208.10 mi (1,944.25 km) |
| Siano to Sao Joao de Ver | 1,210.82 mi (1,948.63 km) |
| Siano to Sao Mamede de Infesta | 1,211.34 mi (1,949.47 km) |
| Siano to Sao Pedro do Sul | 1,187.54 mi (1,911.17 km) |
| Siano to Satao | 1,170.40 mi (1,883.57 km) |
| Siano to Seia | 1,171.83 mi (1,885.87 km) |
| Siano to Senhora da Hora | 1,214.09 mi (1,953.88 km) |
| Siano to Serpa | 1,203.59 mi (1,936.99 km) |
| Siano to Serta | 1,199.75 mi (1,930.80 km) |
| Siano to Sesimbra | 1,272.77 mi (2,048.33 km) |
