| Piraeus to Sestao | 1,439.20 mi (2,316.17 km) |
| Piraeus to Sevilla | 1,616.43 mi (2,601.39 km) |
| Piraeus to Sevilla La Nueva | 1,486.16 mi (2,391.75 km) |
| Piraeus to Silla | 1,297.94 mi (2,088.83 km) |
| Piraeus to Silleda | 1,700.71 mi (2,737.02 km) |
| Piraeus to Sitges | 1,181.75 mi (1,901.84 km) |
| Piraeus to Socuellamos | 1,425.37 mi (2,293.91 km) |
| Piraeus to Soller | 1,131.47 mi (1,820.92 km) |
| Piraeus to Solsona | 1,201.08 mi (1,932.95 km) |
| Piraeus to Son Servera | 1,096.44 mi (1,764.55 km) |
| Piraeus to Sonseca | 1,484.65 mi (2,389.31 km) |
| Piraeus to Sopelana | 1,438.38 mi (2,314.85 km) |
| Piraeus to Soria | 1,404.39 mi (2,260.14 km) |
| Piraeus to Suances | 1,492.22 mi (2,401.50 km) |
| Piraeus to Sueca | 1,293.33 mi (2,081.41 km) |
