| Pont-y-pwl to Sesena | 802.05 mi (1,290.78 km) |
| Pont-y-pwl to Sestao | 579.85 mi (933.17 km) |
| Pont-y-pwl to Sevilla | 1,009.60 mi (1,624.80 km) |
| Pont-y-pwl to Sevilla La Nueva | 786.00 mi (1,264.94 km) |
| Pont-y-pwl to Silla | 862.00 mi (1,387.25 km) |
| Pont-y-pwl to Silleda | 667.67 mi (1,074.51 km) |
| Pont-y-pwl to Sitges | 758.77 mi (1,221.13 km) |
| Pont-y-pwl to Socuellamos | 857.51 mi (1,380.03 km) |
| Pont-y-pwl to Soller | 869.27 mi (1,398.95 km) |
| Pont-y-pwl to Solsona | 704.18 mi (1,133.28 km) |
| Pont-y-pwl to Son Servera | 889.33 mi (1,431.24 km) |
| Pont-y-pwl to Sonseca | 830.47 mi (1,336.51 km) |
| Pont-y-pwl to Sopelana | 574.97 mi (925.33 km) |
| Pont-y-pwl to Soria | 687.06 mi (1,105.72 km) |
| Pont-y-pwl to Suances | 573.30 mi (922.63 km) |
