| Sierning to Setubal | 1,332.05 mi (2,143.72 km) |
| Sierning to Sever do Vouga | 1,222.36 mi (1,967.21 km) |
| Sierning to Silves | 1,370.57 mi (2,205.72 km) |
| Sierning to Sines | 1,354.92 mi (2,180.54 km) |
| Sierning to Sintra | 1,342.20 mi (2,160.06 km) |
| Sierning to Sobrado de Paiva | 1,207.05 mi (1,942.56 km) |
| Sierning to Sobral de Monte Agraco | 1,323.04 mi (2,129.22 km) |
| Sierning to Soure | 1,259.73 mi (2,027.34 km) |
| Sierning to Tabua | 1,221.31 mi (1,965.52 km) |
| Sierning to Tavira | 1,340.84 mi (2,157.87 km) |
| Sierning to Tomar | 1,267.72 mi (2,040.19 km) |
| Sierning to Tondela | 1,217.82 mi (1,959.90 km) |
| Sierning to Torre de Moncorvo | 1,150.68 mi (1,851.83 km) |
| Sierning to Torres Novas | 1,278.09 mi (2,056.88 km) |
| Sierning to Torres Vedras | 1,325.41 mi (2,133.04 km) |
