| Biga to Sesena | 1,625.27 mi (2,615.63 km) |
| Biga to Sestao | 1,564.51 mi (2,517.83 km) |
| Biga to Sevilla | 1,792.42 mi (2,884.63 km) |
| Biga to Sevilla La Nueva | 1,639.45 mi (2,638.44 km) |
| Biga to Silla | 1,463.26 mi (2,354.89 km) |
| Biga to Silleda | 1,831.18 mi (2,947.01 km) |
| Biga to Sitges | 1,328.93 mi (2,138.71 km) |
| Biga to Socuellamos | 1,589.01 mi (2,557.27 km) |
| Biga to Soller | 1,295.27 mi (2,084.54 km) |
| Biga to Solsona | 1,339.62 mi (2,155.92 km) |
| Biga to Son Servera | 1,262.32 mi (2,031.50 km) |
| Biga to Sonseca | 1,643.66 mi (2,645.22 km) |
| Biga to Sopelana | 1,562.97 mi (2,515.36 km) |
| Biga to Soria | 1,545.18 mi (2,486.72 km) |
| Biga to Suances | 1,616.49 mi (2,601.49 km) |
