| Round Rock to Santarem | 4,873.76 mi (7,843.56 km) |
| Round Rock to Santiago do Cacem | 4,907.56 mi (7,897.95 km) |
| Round Rock to Santo Andre | 4,904.13 mi (7,892.44 km) |
| Round Rock to Santo Tirso | 4,825.97 mi (7,766.66 km) |
| Round Rock to Sao Bras de Alportel | 4,973.23 mi (8,003.64 km) |
| Round Rock to Sao Felix da Marinha | 4,826.75 mi (7,767.90 km) |
| Round Rock to Sao Joao da Madeira | 4,836.93 mi (7,784.29 km) |
| Round Rock to Sao Joao de Ver | 4,832.39 mi (7,776.99 km) |
| Round Rock to Sao Mamede de Infesta | 4,823.28 mi (7,762.33 km) |
| Round Rock to Sao Pedro do Sul | 4,861.23 mi (7,823.40 km) |
| Round Rock to Satao | 4,877.65 mi (7,849.82 km) |
| Round Rock to Seia | 4,887.92 mi (7,866.34 km) |
| Round Rock to Senhora da Hora | 4,821.23 mi (7,759.03 km) |
| Round Rock to Serpa | 4,964.12 mi (7,988.98 km) |
| Round Rock to Serta | 4,886.33 mi (7,863.78 km) |
