| Biga to Sesimbra | 1,932.42 mi (3,109.93 km) |
| Biga to Setubal | 1,920.16 mi (3,090.20 km) |
| Biga to Sever do Vouga | 1,858.75 mi (2,991.36 km) |
| Biga to Silves | 1,922.24 mi (3,093.55 km) |
| Biga to Sines | 1,929.26 mi (3,104.84 km) |
| Biga to Sintra | 1,941.13 mi (3,123.95 km) |
| Biga to Sobrado de Paiva | 1,849.86 mi (2,977.06 km) |
| Biga to Sobral de Monte Agraco | 1,925.05 mi (3,098.07 km) |
| Biga to Soure | 1,881.87 mi (3,028.57 km) |
| Biga to Tabua | 1,846.29 mi (2,971.32 km) |
| Biga to Tavira | 1,882.24 mi (3,029.17 km) |
| Biga to Tomar | 1,877.40 mi (3,021.38 km) |
| Biga to Tondela | 1,846.98 mi (2,972.43 km) |
| Biga to Torre de Moncorvo | 1,789.76 mi (2,880.34 km) |
| Biga to Torres Novas | 1,885.53 mi (3,034.47 km) |
