| Sierning to Sestao | 895.18 mi (1,440.66 km) |
| Sierning to Sevilla | 1,267.07 mi (2,039.15 km) |
| Sierning to Sevilla La Nueva | 1,048.76 mi (1,687.82 km) |
| Sierning to Silla | 946.17 mi (1,522.72 km) |
| Sierning to Silleda | 1,149.89 mi (1,850.57 km) |
| Sierning to Sitges | 772.63 mi (1,243.43 km) |
| Sierning to Socuellamos | 1,043.29 mi (1,679.01 km) |
| Sierning to Soller | 811.43 mi (1,305.86 km) |
| Sierning to Solsona | 750.21 mi (1,207.35 km) |
| Sierning to Son Servera | 796.34 mi (1,281.59 km) |
| Sierning to Sonseca | 1,072.72 mi (1,726.37 km) |
| Sierning to Sopelana | 891.77 mi (1,435.16 km) |
| Sierning to Soria | 925.80 mi (1,489.92 km) |
| Sierning to Suances | 938.17 mi (1,509.84 km) |
| Sierning to Sueca | 950.09 mi (1,529.03 km) |
