| Santander to Solofra | 970.59 mi (1,562.01 km) |
| Santander to Somma Lombardo | 633.59 mi (1,019.66 km) |
| Santander to Somma Vesuviana | 949.15 mi (1,527.50 km) |
| Santander to Sommacampagna | 734.26 mi (1,181.68 km) |
| Santander to Sona | 733.67 mi (1,180.73 km) |
| Santander to Sondrio | 694.85 mi (1,118.26 km) |
| Santander to Sora | 892.70 mi (1,436.66 km) |
| Santander to Sorbolo | 712.07 mi (1,145.97 km) |
| Santander to Soresina | 685.51 mi (1,103.22 km) |
| Santander to Sorisole | 679.74 mi (1,093.94 km) |
| Santander to Sorrento | 951.04 mi (1,530.55 km) |
| Santander to Sorso | 659.92 mi (1,062.04 km) |
| Santander to Sortino | 1,080.45 mi (1,738.82 km) |
| Santander to Soverato Marina | 1,107.20 mi (1,781.87 km) |
| Santander to Sovicille | 754.36 mi (1,214.02 km) |
