| Merthyr Tudful to Accokeek (Maryland) | 3,535.65 mi (5,690.08 km) |
| Merthyr Tudful to Acworth (Georgia) | 4,065.61 mi (6,542.96 km) |
| Merthyr Tudful to Ada (Oklahoma) | 4,508.71 mi (7,256.06 km) |
| Merthyr Tudful to Addison (Illinois) | 3,827.81 mi (6,160.26 km) |
| Merthyr Tudful to Addison (Texas) | 4,607.13 mi (7,414.45 km) |
| Merthyr Tudful to Adelanto (California) | 5,267.77 mi (8,477.65 km) |
| Merthyr Tudful to Adelphi (Maryland) | 3,519.52 mi (5,664.12 km) |
| Merthyr Tudful to Adrian (Michigan) | 3,675.15 mi (5,914.59 km) |
| Merthyr Tudful to Affton (Missouri) | 4,076.04 mi (6,559.76 km) |
| Merthyr Tudful to Agoura Hills (California) | 5,335.58 mi (8,586.79 km) |
| Merthyr Tudful to Aguadilla (Puerto Rico) | 4,109.28 mi (6,613.25 km) |
| Merthyr Tudful to Aiken (South Carolina) | 3,969.64 mi (6,388.52 km) |
| Merthyr Tudful to Akron (Ohio) | 3,611.79 mi (5,812.62 km) |
| Merthyr Tudful to Alabaster (Alabama) | 4,194.18 mi (6,749.89 km) |
| Merthyr Tudful to Alachua (Florida) | 4,184.07 mi (6,733.62 km) |
