| Merthyr Tudful to Archdale (North Carolina) | 3,784.18 mi (6,090.04 km) |
| Merthyr Tudful to Arden-Arcade (California) | 5,166.13 mi (8,314.08 km) |
| Merthyr Tudful to Ardmore (Oklahoma) | 4,555.38 mi (7,331.18 km) |
| Merthyr Tudful to Ardmore (Pennsylvania) | 3,406.80 mi (5,482.72 km) |
| Merthyr Tudful to Arecibo (Puerto Rico) | 4,091.18 mi (6,584.11 km) |
| Merthyr Tudful to Arkadelphia (Arkansas) | 4,400.44 mi (7,081.82 km) |
| Merthyr Tudful to Arkansas City (Kansas) | 4,406.75 mi (7,091.98 km) |
| Merthyr Tudful to Arlington (Tennessee) | 4,209.22 mi (6,774.08 km) |
| Merthyr Tudful to Arlington (Texas) | 4,631.68 mi (7,453.98 km) |
| Merthyr Tudful to Arlington (Virginia) | 3,530.60 mi (5,681.95 km) |
| Merthyr Tudful to Arlington (Washington) | 4,647.95 mi (7,480.16 km) |
| Merthyr Tudful to Arlington Heights (Illinois) | 3,819.30 mi (6,146.57 km) |
| Merthyr Tudful to Arnold (Maryland) | 3,498.44 mi (5,630.20 km) |
| Merthyr Tudful to Arnold (Missouri) | 4,083.63 mi (6,571.96 km) |
| Merthyr Tudful to Arroyo Grande (California) | 5,339.30 mi (8,592.77 km) |
