| Merthyr Tudful to Rivalta di Torino | 680.47 mi (1,095.12 km) |
| Merthyr Tudful to Rivarolo Canavese | 672.42 mi (1,082.16 km) |
| Merthyr Tudful to Rivoli | 678.65 mi (1,092.19 km) |
| Merthyr Tudful to Rocca di Papa | 1,023.28 mi (1,646.82 km) |
| Merthyr Tudful to Rocca Priora | 1,024.17 mi (1,648.24 km) |
| Merthyr Tudful to Roccapiemonte | 1,143.73 mi (1,840.66 km) |
| Merthyr Tudful to Roccastrada | 906.59 mi (1,459.01 km) |
| Merthyr Tudful to Romano di Lombardia | 736.11 mi (1,184.65 km) |
| Merthyr Tudful to Rome | 1,008.73 mi (1,623.39 km) |
| Merthyr Tudful to Roncade | 831.24 mi (1,337.75 km) |
| Merthyr Tudful to Ronchi dei Legionari | 867.21 mi (1,395.63 km) |
| Merthyr Tudful to Ronciglione | 979.25 mi (1,575.95 km) |
| Merthyr Tudful to Rosa | 803.77 mi (1,293.54 km) |
| Merthyr Tudful to Rosarno | 1,307.55 mi (2,104.31 km) |
| Merthyr Tudful to Rosignano Marittimo | 862.73 mi (1,388.44 km) |
