| Merthyr Tudful to Roeselare | 285.86 mi (460.04 km) |
| Merthyr Tudful to Ronse | 309.37 mi (497.88 km) |
| Merthyr Tudful to Rotselaar | 353.15 mi (568.34 km) |
| Merthyr Tudful to Rumst | 338.81 mi (545.27 km) |
| Merthyr Tudful to Saint-Ghislain | 324.56 mi (522.33 km) |
| Merthyr Tudful to Saint-Nicolas | 393.18 mi (632.77 km) |
| Merthyr Tudful to Saint-Vith | 425.24 mi (684.35 km) |
| Merthyr Tudful to Scherpenheuvel | 363.49 mi (584.97 km) |
| Merthyr Tudful to Schilde | 343.44 mi (552.71 km) |
| Merthyr Tudful to Schoten | 340.41 mi (547.84 km) |
| Merthyr Tudful to Seneffe | 340.91 mi (548.65 km) |
| Merthyr Tudful to Seraing | 392.66 mi (631.93 km) |
| Merthyr Tudful to Sint-Amandsberg | 310.77 mi (500.14 km) |
| Merthyr Tudful to Sint-Andries | 284.77 mi (458.29 km) |
| Merthyr Tudful to Sint-Genesius-Rode | 340.97 mi (548.74 km) |
