| Merthyr Tudful to Redon | 288.54 mi (464.36 km) |
| Merthyr Tudful to Reims | 367.84 mi (591.98 km) |
| Merthyr Tudful to Rennes | 261.81 mi (421.34 km) |
| Merthyr Tudful to Revel | 624.49 mi (1,005.02 km) |
| Merthyr Tudful to Reze | 324.75 mi (522.64 km) |
| Merthyr Tudful to Riedisheim | 552.67 mi (889.43 km) |
| Merthyr Tudful to Rillieux-la-Pape | 555.53 mi (894.04 km) |
| Merthyr Tudful to Riom | 500.11 mi (804.84 km) |
| Merthyr Tudful to Riorges | 517.81 mi (833.34 km) |
| Merthyr Tudful to Ris-Orangis | 333.34 mi (536.46 km) |
| Merthyr Tudful to Rive-de-Gier | 562.86 mi (905.84 km) |
| Merthyr Tudful to Rivesaltes | 685.26 mi (1,102.82 km) |
| Merthyr Tudful to Rixheim | 554.10 mi (891.74 km) |
| Merthyr Tudful to Roanne | 518.98 mi (835.22 km) |
| Merthyr Tudful to Roche-la-Moliere | 559.64 mi (900.66 km) |
