| Merthyr Tudful to Sceaux | 323.33 mi (520.34 km) |
| Merthyr Tudful to Schiltigheim | 537.24 mi (864.60 km) |
| Merthyr Tudful to Scionzier | 597.12 mi (960.98 km) |
| Merthyr Tudful to Seclin | 289.63 mi (466.11 km) |
| Merthyr Tudful to Sedan | 389.95 mi (627.57 km) |
| Merthyr Tudful to Selestat | 537.20 mi (864.54 km) |
| Merthyr Tudful to Sene | 286.33 mi (460.80 km) |
| Merthyr Tudful to Senlis | 315.26 mi (507.37 km) |
| Merthyr Tudful to Sens | 384.13 mi (618.19 km) |
| Merthyr Tudful to Septemes-les-Vallons | 705.01 mi (1,134.60 km) |
| Merthyr Tudful to Serris | 337.14 mi (542.58 km) |
| Merthyr Tudful to Sete | 663.09 mi (1,067.13 km) |
| Merthyr Tudful to Sevran | 324.86 mi (522.81 km) |
| Merthyr Tudful to Sevres | 318.56 mi (512.68 km) |
| Merthyr Tudful to Seynod | 590.22 mi (949.87 km) |
