| Sint-Gillis-Waas to Sestao | 639.56 mi (1,029.26 km) |
| Sint-Gillis-Waas to Sevilla | 1,085.29 mi (1,746.60 km) |
| Sint-Gillis-Waas to Sevilla La Nueva | 846.15 mi (1,361.74 km) |
| Sint-Gillis-Waas to Silla | 847.72 mi (1,364.27 km) |
| Sint-Gillis-Waas to Silleda | 825.82 mi (1,329.04 km) |
| Sint-Gillis-Waas to Sitges | 698.45 mi (1,124.05 km) |
| Sint-Gillis-Waas to Socuellamos | 888.79 mi (1,430.37 km) |
| Sint-Gillis-Waas to Soller | 794.05 mi (1,277.90 km) |
| Sint-Gillis-Waas to Solsona | 648.92 mi (1,044.34 km) |
| Sint-Gillis-Waas to Son Servera | 802.03 mi (1,290.74 km) |
| Sint-Gillis-Waas to Sonseca | 885.31 mi (1,424.77 km) |
| Sint-Gillis-Waas to Sopelana | 634.64 mi (1,021.36 km) |
| Sint-Gillis-Waas to Soria | 723.44 mi (1,164.27 km) |
| Sint-Gillis-Waas to Suances | 659.05 mi (1,060.64 km) |
| Sint-Gillis-Waas to Sueca | 857.21 mi (1,379.55 km) |
