| Castellana Grotte to Sestao | 1,045.06 mi (1,681.86 km) |
| Castellana Grotte to Sevilla | 1,263.64 mi (2,033.64 km) |
| Castellana Grotte to Sevilla La Nueva | 1,109.56 mi (1,785.66 km) |
| Castellana Grotte to Silla | 932.99 mi (1,501.50 km) |
| Castellana Grotte to Silleda | 1,309.50 mi (2,107.43 km) |
| Castellana Grotte to Sitges | 799.70 mi (1,286.99 km) |
| Castellana Grotte to Socuellamos | 1,058.52 mi (1,703.52 km) |
| Castellana Grotte to Soller | 765.06 mi (1,231.24 km) |
| Castellana Grotte to Solsona | 813.04 mi (1,308.47 km) |
| Castellana Grotte to Son Servera | 732.49 mi (1,178.83 km) |
| Castellana Grotte to Sonseca | 1,113.18 mi (1,791.49 km) |
| Castellana Grotte to Sopelana | 1,043.94 mi (1,680.06 km) |
| Castellana Grotte to Soria | 1,018.34 mi (1,638.86 km) |
| Castellana Grotte to Suances | 1,097.79 mi (1,766.72 km) |
| Castellana Grotte to Sueca | 930.18 mi (1,496.98 km) |
