| Llantrisant to Sesena | 790.47 mi (1,272.14 km) |
| Llantrisant to Sestao | 568.98 mi (915.69 km) |
| Llantrisant to Sevilla | 996.40 mi (1,603.55 km) |
| Llantrisant to Sevilla La Nueva | 774.09 mi (1,245.78 km) |
| Llantrisant to Silla | 853.56 mi (1,373.67 km) |
| Llantrisant to Silleda | 651.86 mi (1,049.06 km) |
| Llantrisant to Sitges | 753.30 mi (1,212.31 km) |
| Llantrisant to Socuellamos | 846.76 mi (1,362.74 km) |
| Llantrisant to Soller | 864.13 mi (1,390.68 km) |
| Llantrisant to Solsona | 698.73 mi (1,124.50 km) |
| Llantrisant to Son Servera | 884.80 mi (1,423.95 km) |
| Llantrisant to Sonseca | 818.67 mi (1,317.52 km) |
| Llantrisant to Sopelana | 564.14 mi (907.90 km) |
| Llantrisant to Soria | 676.77 mi (1,089.15 km) |
| Llantrisant to Suances | 561.14 mi (903.06 km) |
