| Merthyr Tudful to Rury | 1,108.67 mi (1,784.23 km) |
| Merthyr Tudful to Rybnik | 958.42 mi (1,542.43 km) |
| Merthyr Tudful to Ryki | 1,078.74 mi (1,736.07 km) |
| Merthyr Tudful to Rypin | 962.46 mi (1,548.94 km) |
| Merthyr Tudful to Rzeszow | 1,106.76 mi (1,781.15 km) |
| Merthyr Tudful to Sandomierz | 1,084.64 mi (1,745.56 km) |
| Merthyr Tudful to Sanok | 1,125.62 mi (1,811.51 km) |
| Merthyr Tudful to Sedziszow Malopolski | 1,093.32 mi (1,759.53 km) |
| Merthyr Tudful to Sepolno Krajenskie | 882.12 mi (1,419.64 km) |
| Merthyr Tudful to Sidlice | 927.17 mi (1,492.13 km) |
| Merthyr Tudful to Siechnice | 883.60 mi (1,422.01 km) |
| Merthyr Tudful to Siedlce | 1,086.88 mi (1,749.17 km) |
| Merthyr Tudful to Siemianowice Slaskie | 973.62 mi (1,566.89 km) |
| Merthyr Tudful to Siemiatycze | 1,108.97 mi (1,784.71 km) |
| Merthyr Tudful to Sieradz | 944.58 mi (1,520.16 km) |
