| Merthyr Tudful to Rende | 1,269.83 mi (2,043.60 km) |
| Merthyr Tudful to Resana | 814.31 mi (1,310.50 km) |
| Merthyr Tudful to Rescaldina | 702.36 mi (1,130.34 km) |
| Merthyr Tudful to Rezzato | 757.23 mi (1,218.64 km) |
| Merthyr Tudful to Rho | 709.20 mi (1,141.34 km) |
| Merthyr Tudful to Ribera | 1,273.78 mi (2,049.95 km) |
| Merthyr Tudful to Riccione Marina | 912.22 mi (1,468.08 km) |
| Merthyr Tudful to Riesi | 1,311.52 mi (2,110.68 km) |
| Merthyr Tudful to Rieti | 996.03 mi (1,602.95 km) |
| Merthyr Tudful to Rignano Flaminio | 993.13 mi (1,598.29 km) |
| Merthyr Tudful to Rignano sull'Arno | 881.37 mi (1,418.44 km) |
| Merthyr Tudful to Rimini | 906.46 mi (1,458.81 km) |
| Merthyr Tudful to Rionero in Vulture | 1,170.71 mi (1,884.08 km) |
| Merthyr Tudful to Riposto | 1,322.24 mi (2,127.94 km) |
| Merthyr Tudful to Riva del Garda | 761.56 mi (1,225.61 km) |
