| Merthyr Tudful to Sosnowiec | 979.79 mi (1,576.82 km) |
| Merthyr Tudful to Srem | 866.57 mi (1,394.60 km) |
| Merthyr Tudful to Sroda Slaska | 857.86 mi (1,380.60 km) |
| Merthyr Tudful to Sroda Wielkopolska | 876.80 mi (1,411.07 km) |
| Merthyr Tudful to Stalowa Wola | 1,099.34 mi (1,769.22 km) |
| Merthyr Tudful to Starachowice | 1,049.94 mi (1,689.71 km) |
| Merthyr Tudful to Stargard Szczecinski | 779.95 mi (1,255.21 km) |
| Merthyr Tudful to Starogard Gdanski | 923.13 mi (1,485.63 km) |
| Merthyr Tudful to Stary Sacz | 1,057.79 mi (1,702.35 km) |
| Merthyr Tudful to Staszow | 1,061.78 mi (1,708.77 km) |
| Merthyr Tudful to Strzegom | 850.15 mi (1,368.19 km) |
| Merthyr Tudful to Strzelce Krajenskie | 800.30 mi (1,287.96 km) |
| Merthyr Tudful to Strzelce Opolskie | 939.83 mi (1,512.51 km) |
| Merthyr Tudful to Strzelin | 883.49 mi (1,421.84 km) |
| Merthyr Tudful to Strzyzow | 1,100.39 mi (1,770.90 km) |
