| Big Spring to Sesimbra | 4,994.93 mi (8,038.57 km) |
| Big Spring to Setubal | 5,002.29 mi (8,050.40 km) |
| Big Spring to Sever do Vouga | 4,956.92 mi (7,977.40 km) |
| Big Spring to Silves | 5,067.36 mi (8,155.12 km) |
| Big Spring to Sines | 5,021.91 mi (8,081.98 km) |
| Big Spring to Sintra | 4,969.80 mi (7,998.12 km) |
| Big Spring to Sobrado de Paiva | 4,952.10 mi (7,969.63 km) |
| Big Spring to Sobral de Monte Agraco | 4,974.17 mi (8,005.15 km) |
| Big Spring to Soure | 4,966.06 mi (7,992.09 km) |
| Big Spring to Tabua | 4,984.50 mi (8,021.78 km) |
| Big Spring to Tavira | 5,107.89 mi (8,220.36 km) |
| Big Spring to Tomar | 4,990.56 mi (8,031.54 km) |
| Big Spring to Tondela | 4,976.99 mi (8,009.70 km) |
| Big Spring to Torre de Moncorvo | 4,999.14 mi (8,045.33 km) |
| Big Spring to Torres Novas | 4,989.30 mi (8,029.51 km) |
