| Sid to Sestao | 1,104.83 mi (1,778.05 km) |
| Sid to Sevilla | 1,412.69 mi (2,273.50 km) |
| Sid to Sevilla La Nueva | 1,220.90 mi (1,964.85 km) |
| Sid to Silla | 1,077.19 mi (1,733.57 km) |
| Sid to Silleda | 1,370.70 mi (2,205.93 km) |
| Sid to Sitges | 916.16 mi (1,474.41 km) |
| Sid to Socuellamos | 1,192.47 mi (1,919.09 km) |
| Sid to Soller | 918.28 mi (1,477.83 km) |
| Sid to Solsona | 910.88 mi (1,465.92 km) |
| Sid to Son Servera | 892.80 mi (1,436.83 km) |
| Sid to Sonseca | 1,235.51 mi (1,988.36 km) |
| Sid to Sopelana | 1,102.35 mi (1,774.07 km) |
| Sid to Soria | 1,109.37 mi (1,785.35 km) |
| Sid to Suances | 1,153.67 mi (1,856.65 km) |
| Sid to Sueca | 1,077.74 mi (1,734.46 km) |
