| Rock Island to Sesimbra | 4,151.76 mi (6,681.61 km) |
| Rock Island to Setubal | 4,158.43 mi (6,692.35 km) |
| Rock Island to Sever do Vouga | 4,104.20 mi (6,605.07 km) |
| Rock Island to Silves | 4,228.05 mi (6,804.39 km) |
| Rock Island to Sines | 4,180.27 mi (6,727.49 km) |
| Rock Island to Sintra | 4,125.72 mi (6,639.71 km) |
| Rock Island to Sobrado de Paiva | 4,098.23 mi (6,595.47 km) |
| Rock Island to Sobral de Monte Agraco | 4,128.84 mi (6,644.73 km) |
| Rock Island to Soure | 4,116.09 mi (6,624.20 km) |
| Rock Island to Tabua | 4,132.56 mi (6,650.71 km) |
| Rock Island to Tavira | 4,267.37 mi (6,867.67 km) |
| Rock Island to Tomar | 4,141.88 mi (6,665.71 km) |
| Rock Island to Tondela | 4,124.60 mi (6,637.90 km) |
| Rock Island to Torre de Moncorvo | 4,143.23 mi (6,667.88 km) |
| Rock Island to Torres Novas | 4,141.29 mi (6,664.76 km) |
