| Merthyr Tudful to Allouez (Wisconsin) | 3,713.69 mi (5,976.61 km) |
| Merthyr Tudful to Aloha (Oregon) | 4,818.52 mi (7,754.65 km) |
| Merthyr Tudful to Alpena (Michigan) | 3,513.00 mi (5,653.63 km) |
| Merthyr Tudful to Alpharetta (Georgia) | 4,048.64 mi (6,515.66 km) |
| Merthyr Tudful to Alpine (California) | 5,342.57 mi (8,598.03 km) |
| Merthyr Tudful to Alpine (Utah) | 4,756.57 mi (7,654.96 km) |
| Merthyr Tudful to Alsip (Illinois) | 3,829.30 mi (6,162.66 km) |
| Merthyr Tudful to Altadena (California) | 5,312.62 mi (8,549.84 km) |
| Merthyr Tudful to Altamont (Oregon) | 4,972.12 mi (8,001.85 km) |
| Merthyr Tudful to Altamonte Springs (Florida) | 4,193.75 mi (6,749.18 km) |
| Merthyr Tudful to Alton (Illinois) | 4,052.35 mi (6,521.63 km) |
| Merthyr Tudful to Alton (Texas) | 5,011.99 mi (8,066.02 km) |
| Merthyr Tudful to Altoona (Iowa) | 4,048.79 mi (6,515.89 km) |
| Merthyr Tudful to Altoona (Pennsylvania) | 3,511.49 mi (5,651.20 km) |
| Merthyr Tudful to Altus (Oklahoma) | 4,615.49 mi (7,427.92 km) |
