| Merthyr Tudful to Celbridge | 172.56 mi (277.71 km) |
| Merthyr Tudful to Clondalkin | 167.17 mi (269.03 km) |
| Merthyr Tudful to Clonmel | 188.89 mi (303.98 km) |
| Merthyr Tudful to Cobh | 210.27 mi (338.40 km) |
| Merthyr Tudful to Cork | 217.69 mi (350.34 km) |
| Merthyr Tudful to Donegal | 280.62 mi (451.61 km) |
| Merthyr Tudful to Douglas | 216.22 mi (347.97 km) |
| Merthyr Tudful to Drogheda | 184.51 mi (296.94 km) |
| Merthyr Tudful to Dublin | 164.28 mi (264.38 km) |
| Merthyr Tudful to Dun Dealgan | 201.07 mi (323.59 km) |
| Merthyr Tudful to Ennis | 248.65 mi (400.16 km) |
| Merthyr Tudful to Enniscorthy | 145.03 mi (233.41 km) |
| Merthyr Tudful to Finglas | 168.12 mi (270.57 km) |
| Merthyr Tudful to Galway | 260.74 mi (419.62 km) |
| Merthyr Tudful to Glanmire | 214.73 mi (345.57 km) |
