| Merthyr Tudful to Senftenberg | 744.44 mi (1,198.05 km) |
| Merthyr Tudful to Siegburg | 461.62 mi (742.90 km) |
| Merthyr Tudful to Siegen | 495.17 mi (796.89 km) |
| Merthyr Tudful to Sigmaringen | 613.59 mi (987.49 km) |
| Merthyr Tudful to Simbach am Inn | 764.70 mi (1,230.67 km) |
| Merthyr Tudful to Simmerath | 426.28 mi (686.04 km) |
| Merthyr Tudful to Sindelfingen | 585.01 mi (941.48 km) |
| Merthyr Tudful to Sinsheim | 564.96 mi (909.22 km) |
| Merthyr Tudful to Sinzheim | 549.30 mi (884.01 km) |
| Merthyr Tudful to Sinzig | 467.70 mi (752.69 km) |
| Merthyr Tudful to Soest | 492.01 mi (791.82 km) |
| Merthyr Tudful to Solingen | 451.77 mi (727.05 km) |
| Merthyr Tudful to Soltau | 563.13 mi (906.27 km) |
| Merthyr Tudful to Sommerda | 624.36 mi (1,004.81 km) |
| Merthyr Tudful to Sondershausen | 611.53 mi (984.16 km) |
