| Merthyr Tudful to Aberaman | 3.80 mi (6.11 km) |
| Merthyr Tudful to Aberbargoed | 7.32 mi (11.79 km) |
| Merthyr Tudful to Aberdare | 3.54 mi (5.69 km) |
| Merthyr Tudful to Aberdeen | 377.03 mi (606.77 km) |
| Merthyr Tudful to Abergavenny | 16.43 mi (26.44 km) |
| Merthyr Tudful to Abergele | 106.54 mi (171.45 km) |
| Merthyr Tudful to Abertawe | 26.01 mi (41.86 km) |
| Merthyr Tudful to Abertillery | 10.65 mi (17.14 km) |
| Merthyr Tudful to Aberystwyth | 55.14 mi (88.74 km) |
| Merthyr Tudful to Abingdon | 89.85 mi (144.61 km) |
| Merthyr Tudful to Abram | 126.37 mi (203.37 km) |
| Merthyr Tudful to Accrington | 145.23 mi (233.73 km) |
| Merthyr Tudful to Acomb | 179.39 mi (288.70 km) |
| Merthyr Tudful to Acton | 134.20 mi (215.98 km) |
| Merthyr Tudful to Addlestone | 126.71 mi (203.91 km) |
