| Somain to Santiago do Cacem | 1,036.09 mi (1,667.43 km) |
| Somain to Santo Andre | 1,035.51 mi (1,666.50 km) |
| Somain to Santo Tirso | 839.69 mi (1,351.35 km) |
| Somain to Sao Bras de Alportel | 1,066.54 mi (1,716.44 km) |
| Somain to Sao Felix da Marinha | 861.01 mi (1,385.66 km) |
| Somain to Sao Joao da Madeira | 864.30 mi (1,390.95 km) |
| Somain to Sao Joao de Ver | 863.12 mi (1,389.06 km) |
| Somain to Sao Mamede de Infesta | 851.21 mi (1,369.89 km) |
| Somain to Sao Pedro do Sul | 859.43 mi (1,383.12 km) |
| Somain to Satao | 850.30 mi (1,368.42 km) |
| Somain to Seia | 867.12 mi (1,395.49 km) |
| Somain to Senhora da Hora | 853.61 mi (1,373.75 km) |
| Somain to Serpa | 1,010.76 mi (1,626.66 km) |
| Somain to Serta | 914.53 mi (1,471.80 km) |
| Somain to Sesimbra | 1,022.32 mi (1,645.26 km) |
