| Willebroek to Sestao | 637.25 mi (1,025.55 km) |
| Willebroek to Sevilla | 1,082.12 mi (1,741.51 km) |
| Willebroek to Sevilla La Nueva | 842.89 mi (1,356.50 km) |
| Willebroek to Silla | 841.03 mi (1,353.50 km) |
| Willebroek to Silleda | 827.46 mi (1,331.67 km) |
| Willebroek to Sitges | 690.25 mi (1,110.85 km) |
| Willebroek to Socuellamos | 884.05 mi (1,422.74 km) |
| Willebroek to Soller | 784.87 mi (1,263.13 km) |
| Willebroek to Solsona | 641.16 mi (1,031.86 km) |
| Willebroek to Son Servera | 792.32 mi (1,275.12 km) |
| Willebroek to Sonseca | 881.68 mi (1,418.92 km) |
| Willebroek to Sopelana | 632.37 mi (1,017.70 km) |
| Willebroek to Soria | 719.56 mi (1,158.03 km) |
| Willebroek to Suances | 657.88 mi (1,058.75 km) |
| Willebroek to Sueca | 850.40 mi (1,368.59 km) |
