| Douglas to Santiago do Cacem | 957.70 mi (1,541.27 km) |
| Douglas to Santo Andre | 955.43 mi (1,537.62 km) |
| Douglas to Santo Tirso | 728.46 mi (1,172.34 km) |
| Douglas to Sao Bras de Alportel | 1,017.85 mi (1,638.07 km) |
| Douglas to Sao Felix da Marinha | 749.19 mi (1,205.70 km) |
| Douglas to Sao Joao da Madeira | 758.59 mi (1,220.84 km) |
| Douglas to Sao Joao de Ver | 754.68 mi (1,214.55 km) |
| Douglas to Sao Mamede de Infesta | 737.71 mi (1,187.23 km) |
| Douglas to Sao Pedro do Sul | 768.96 mi (1,237.52 km) |
| Douglas to Satao | 770.63 mi (1,240.21 km) |
| Douglas to Seia | 792.19 mi (1,274.91 km) |
| Douglas to Senhora da Hora | 738.70 mi (1,188.83 km) |
| Douglas to Serpa | 963.44 mi (1,550.51 km) |
| Douglas to Serta | 834.55 mi (1,343.08 km) |
| Douglas to Sesimbra | 928.66 mi (1,494.54 km) |
