| Letchworth to Santarem | 969.23 mi (1,559.82 km) |
| Letchworth to Santiago do Cacem | 1,047.96 mi (1,686.52 km) |
| Letchworth to Santo Andre | 1,046.75 mi (1,684.58 km) |
| Letchworth to Santo Tirso | 831.54 mi (1,338.23 km) |
| Letchworth to Sao Bras de Alportel | 1,090.12 mi (1,754.37 km) |
| Letchworth to Sao Felix da Marinha | 853.71 mi (1,373.92 km) |
| Letchworth to Sao Joao da Madeira | 859.40 mi (1,383.08 km) |
| Letchworth to Sao Joao de Ver | 857.17 mi (1,379.48 km) |
| Letchworth to Sao Mamede de Infesta | 842.81 mi (1,356.37 km) |
| Letchworth to Sao Pedro do Sul | 859.89 mi (1,383.86 km) |
| Letchworth to Satao | 854.28 mi (1,374.82 km) |
| Letchworth to Seia | 873.65 mi (1,406.00 km) |
| Letchworth to Senhora da Hora | 844.81 mi (1,359.60 km) |
| Letchworth to Serpa | 1,033.07 mi (1,662.57 km) |
| Letchworth to Serta | 921.33 mi (1,482.74 km) |
