| Santander to Siran | 2,197.38 mi (3,536.35 km) |
| Santander to Sirnak | 2,433.53 mi (3,916.38 km) |
| Santander to Sirvan | 2,396.65 mi (3,857.03 km) |
| Santander to Sivas | 2,103.23 mi (3,384.82 km) |
| Santander to Sivasli | 1,768.08 mi (2,845.45 km) |
| Santander to Siverek | 2,270.21 mi (3,653.56 km) |
| Santander to Sivrice | 2,250.87 mi (3,622.42 km) |
| Santander to Sivrihisar | 1,836.96 mi (2,956.31 km) |
| Santander to Sogut | 1,755.88 mi (2,825.82 km) |
| Santander to Sogutlu | 1,751.99 mi (2,819.55 km) |
| Santander to Soke | 1,673.70 mi (2,693.56 km) |
| Santander to Solhan | 2,323.68 mi (3,739.60 km) |
| Santander to Soma | 1,646.38 mi (2,649.59 km) |
| Santander to Sorgun | 2,010.74 mi (3,235.98 km) |
| Santander to Suhut | 1,810.10 mi (2,913.07 km) |
