| Merthyr Tudful to Rhosllanerchrugog | 88.68 mi (142.72 km) |
| Merthyr Tudful to Rhyl | 109.11 mi (175.60 km) |
| Merthyr Tudful to Rhymney | 4.21 mi (6.78 km) |
| Merthyr Tudful to Richmond | 133.53 mi (214.89 km) |
| Merthyr Tudful to Rickmansworth | 124.93 mi (201.06 km) |
| Merthyr Tudful to Ripley | 122.71 mi (197.48 km) |
| Merthyr Tudful to Ripon | 182.58 mi (293.84 km) |
| Merthyr Tudful to Risca | 15.43 mi (24.84 km) |
| Merthyr Tudful to Rochdale | 138.93 mi (223.59 km) |
| Merthyr Tudful to Rochester | 168.49 mi (271.16 km) |
| Merthyr Tudful to Rock Ferry | 113.69 mi (182.96 km) |
| Merthyr Tudful to Rogerstone | 17.44 mi (28.06 km) |
| Merthyr Tudful to Romford | 152.92 mi (246.10 km) |
| Merthyr Tudful to Romsey | 96.44 mi (155.20 km) |
| Merthyr Tudful to Ross on Wye | 35.78 mi (57.59 km) |
