| South Houston to Santarem | 4,787.67 mi (7,705.01 km) |
| South Houston to Santiago do Cacem | 4,818.74 mi (7,755.02 km) |
| South Houston to Santo Andre | 4,815.35 mi (7,749.56 km) |
| South Houston to Santo Tirso | 4,744.86 mi (7,636.11 km) |
| South Houston to Sao Bras de Alportel | 4,883.14 mi (7,858.65 km) |
| South Houston to Sao Felix da Marinha | 4,744.82 mi (7,636.05 km) |
| South Houston to Sao Joao da Madeira | 4,754.79 mi (7,652.09 km) |
| South Houston to Sao Joao de Ver | 4,750.33 mi (7,644.92 km) |
| South Houston to Sao Mamede de Infesta | 4,741.76 mi (7,631.12 km) |
| South Houston to Sao Pedro do Sul | 4,779.06 mi (7,691.15 km) |
| South Houston to Satao | 4,795.68 mi (7,717.90 km) |
| South Houston to Seia | 4,805.25 mi (7,733.31 km) |
| South Houston to Senhora da Hora | 4,739.64 mi (7,627.71 km) |
| South Houston to Serpa | 4,875.99 mi (7,847.14 km) |
| South Houston to Serta | 4,801.95 mi (7,727.99 km) |
