| Merthyr Tudful to Ratingen | 440.42 mi (708.78 km) |
| Merthyr Tudful to Ratzeburg | 605.41 mi (974.31 km) |
| Merthyr Tudful to Raubling | 741.24 mi (1,192.90 km) |
| Merthyr Tudful to Rauenberg | 557.00 mi (896.41 km) |
| Merthyr Tudful to Raunheim | 528.61 mi (850.71 km) |
| Merthyr Tudful to Ravensburg | 639.85 mi (1,029.74 km) |
| Merthyr Tudful to Recke | 472.96 mi (761.16 km) |
| Merthyr Tudful to Recklinghausen | 451.44 mi (726.53 km) |
| Merthyr Tudful to Regen | 750.91 mi (1,208.48 km) |
| Merthyr Tudful to Regensburg | 705.28 mi (1,135.03 km) |
| Merthyr Tudful to Regenstauf | 704.53 mi (1,133.82 km) |
| Merthyr Tudful to Rehau | 676.03 mi (1,087.97 km) |
| Merthyr Tudful to Rehburg-Loccum | 535.76 mi (862.23 km) |
| Merthyr Tudful to Rehlingen-Siersburg | 470.47 mi (757.15 km) |
| Merthyr Tudful to Reichelsheim | 551.67 mi (887.83 km) |
