| Sinaia to Sestao | 1,410.95 mi (2,270.70 km) |
| Sinaia to Sevilla | 1,717.62 mi (2,764.24 km) |
| Sinaia to Sevilla La Nueva | 1,528.48 mi (2,459.86 km) |
| Sinaia to Silla | 1,381.64 mi (2,223.54 km) |
| Sinaia to Silleda | 1,675.97 mi (2,697.22 km) |
| Sinaia to Sitges | 1,222.80 mi (1,967.91 km) |
| Sinaia to Socuellamos | 1,498.54 mi (2,411.67 km) |
| Sinaia to Soller | 1,220.38 mi (1,964.01 km) |
| Sinaia to Solsona | 1,218.47 mi (1,960.94 km) |
| Sinaia to Son Servera | 1,193.37 mi (1,920.54 km) |
| Sinaia to Sonseca | 1,542.60 mi (2,482.58 km) |
| Sinaia to Sopelana | 1,408.36 mi (2,266.54 km) |
| Sinaia to Soria | 1,417.10 mi (2,280.60 km) |
| Sinaia to Suances | 1,459.20 mi (2,348.35 km) |
| Sinaia to Sueca | 1,381.72 mi (2,223.67 km) |
