| San Martin de Valdeiglesias to Siran | 2,270.74 mi (3,654.41 km) |
| San Martin de Valdeiglesias to Sirnak | 2,496.42 mi (4,017.60 km) |
| San Martin de Valdeiglesias to Sirvan | 2,461.90 mi (3,962.05 km) |
| San Martin de Valdeiglesias to Sivas | 2,170.42 mi (3,492.95 km) |
| San Martin de Valdeiglesias to Sivasli | 1,812.55 mi (2,917.02 km) |
| San Martin de Valdeiglesias to Siverek | 2,328.62 mi (3,747.56 km) |
| San Martin de Valdeiglesias to Sivrice | 2,313.59 mi (3,723.36 km) |
| San Martin de Valdeiglesias to Sivrihisar | 1,892.64 mi (3,045.91 km) |
| San Martin de Valdeiglesias to Sogut | 1,813.64 mi (2,918.77 km) |
| San Martin de Valdeiglesias to Sogutlu | 1,817.31 mi (2,924.68 km) |
| San Martin de Valdeiglesias to Soke | 1,707.02 mi (2,747.18 km) |
| San Martin de Valdeiglesias to Solhan | 2,392.60 mi (3,850.52 km) |
| San Martin de Valdeiglesias to Soma | 1,692.43 mi (2,723.71 km) |
| San Martin de Valdeiglesias to Sorgun | 2,075.38 mi (3,340.00 km) |
| San Martin de Valdeiglesias to Suhut | 1,856.74 mi (2,988.13 km) |
