| San Martin de Valdeiglesias to Sestao | 215.89 mi (347.45 km) |
| San Martin de Valdeiglesias to Sevilla | 232.17 mi (373.65 km) |
| San Martin de Valdeiglesias to Sevilla La Nueva | 19.64 mi (31.61 km) |
| San Martin de Valdeiglesias to Silla | 222.66 mi (358.34 km) |
| San Martin de Valdeiglesias to Silleda | 255.57 mi (411.30 km) |
| San Martin de Valdeiglesias to Sitges | 330.00 mi (531.08 km) |
| San Martin de Valdeiglesias to Socuellamos | 112.88 mi (181.66 km) |
| San Martin de Valdeiglesias to Soller | 377.64 mi (607.76 km) |
| San Martin de Valdeiglesias to Solsona | 327.68 mi (527.34 km) |
| San Martin de Valdeiglesias to Son Servera | 413.88 mi (666.08 km) |
| San Martin de Valdeiglesias to Sonseca | 51.71 mi (83.22 km) |
| San Martin de Valdeiglesias to Sopelana | 220.93 mi (355.56 km) |
| San Martin de Valdeiglesias to Soria | 139.80 mi (224.99 km) |
| San Martin de Valdeiglesias to Suances | 212.83 mi (342.52 km) |
| San Martin de Valdeiglesias to Sueca | 231.48 mi (372.53 km) |
