| Silver Spring to Santarem | 3,569.57 mi (5,744.67 km) |
| Silver Spring to Santiago do Cacem | 3,602.28 mi (5,797.31 km) |
| Silver Spring to Santo Andre | 3,598.86 mi (5,791.81 km) |
| Silver Spring to Santo Tirso | 3,525.38 mi (5,673.55 km) |
| Silver Spring to Sao Bras de Alportel | 3,667.67 mi (5,902.54 km) |
| Silver Spring to Sao Felix da Marinha | 3,525.43 mi (5,673.63 km) |
| Silver Spring to Sao Joao da Madeira | 3,535.43 mi (5,689.72 km) |
| Silver Spring to Sao Joao de Ver | 3,530.96 mi (5,682.54 km) |
| Silver Spring to Sao Mamede de Infesta | 3,522.32 mi (5,668.63 km) |
| Silver Spring to Sao Pedro do Sul | 3,559.71 mi (5,728.79 km) |
| Silver Spring to Satao | 3,576.30 mi (5,755.50 km) |
| Silver Spring to Seia | 3,585.99 mi (5,771.10 km) |
| Silver Spring to Senhora da Hora | 3,520.21 mi (5,665.23 km) |
| Silver Spring to Serpa | 3,659.06 mi (5,888.69 km) |
| Silver Spring to Serta | 3,583.15 mi (5,766.52 km) |
