| Sredets to Sestao | 1,523.63 mi (2,452.04 km) |
| Sredets to Sevilla | 1,785.13 mi (2,872.90 km) |
| Sredets to Sevilla La Nueva | 1,616.55 mi (2,601.59 km) |
| Sredets to Silla | 1,451.08 mi (2,335.28 km) |
| Sredets to Silleda | 1,791.05 mi (2,882.42 km) |
| Sredets to Sitges | 1,305.64 mi (2,101.23 km) |
| Sredets to Socuellamos | 1,574.15 mi (2,533.35 km) |
| Sredets to Soller | 1,284.30 mi (2,066.89 km) |
| Sredets to Solsona | 1,310.32 mi (2,108.76 km) |
| Sredets to Son Servera | 1,253.41 mi (2,017.17 km) |
| Sredets to Sonseca | 1,624.84 mi (2,614.92 km) |
| Sredets to Sopelana | 1,521.64 mi (2,448.85 km) |
| Sredets to Soria | 1,514.66 mi (2,437.61 km) |
| Sredets to Suances | 1,574.38 mi (2,533.72 km) |
| Sredets to Sueca | 1,449.29 mi (2,332.41 km) |
