| Welver to Sestao | 767.52 mi (1,235.21 km) |
| Welver to Sevilla | 1,203.97 mi (1,937.60 km) |
| Welver to Sevilla La Nueva | 965.58 mi (1,553.95 km) |
| Welver to Silla | 937.30 mi (1,508.44 km) |
| Welver to Silleda | 975.15 mi (1,569.35 km) |
| Welver to Sitges | 774.26 mi (1,246.05 km) |
| Welver to Socuellamos | 995.93 mi (1,602.79 km) |
| Welver to Soller | 856.61 mi (1,378.59 km) |
| Welver to Solsona | 730.59 mi (1,175.78 km) |
| Welver to Son Servera | 857.66 mi (1,380.28 km) |
| Welver to Sonseca | 1,001.54 mi (1,611.82 km) |
| Welver to Sopelana | 762.86 mi (1,227.70 km) |
| Welver to Soria | 839.22 mi (1,350.59 km) |
| Welver to Suances | 794.06 mi (1,277.91 km) |
| Welver to Sueca | 945.45 mi (1,521.56 km) |
