| Shannon to Santiago do Cacem | 1,015.50 mi (1,634.28 km) |
| Shannon to Santo Andre | 1,013.18 mi (1,630.55 km) |
| Shannon to Santo Tirso | 786.53 mi (1,265.80 km) |
| Shannon to Sao Bras de Alportel | 1,076.40 mi (1,732.30 km) |
| Shannon to Sao Felix da Marinha | 807.07 mi (1,298.86 km) |
| Shannon to Sao Joao da Madeira | 816.64 mi (1,314.25 km) |
| Shannon to Sao Joao de Ver | 812.65 mi (1,307.84 km) |
| Shannon to Sao Mamede de Infesta | 795.62 mi (1,280.42 km) |
| Shannon to Sao Pedro do Sul | 827.47 mi (1,331.68 km) |
| Shannon to Satao | 829.48 mi (1,334.92 km) |
| Shannon to Seia | 851.05 mi (1,369.63 km) |
| Shannon to Senhora da Hora | 796.55 mi (1,281.93 km) |
| Shannon to Serpa | 1,022.26 mi (1,645.17 km) |
| Shannon to Serta | 892.99 mi (1,437.13 km) |
| Shannon to Sesimbra | 986.02 mi (1,586.85 km) |
