| Merthyr Tudful to Ashwaubenon (Wisconsin) | 3,715.73 mi (5,979.90 km) |
| Merthyr Tudful to Aspen Hill (Maryland) | 3,520.31 mi (5,665.38 km) |
| Merthyr Tudful to Astoria (Oregon) | 4,804.90 mi (7,732.75 km) |
| Merthyr Tudful to Atascadero (California) | 5,322.07 mi (8,565.05 km) |
| Merthyr Tudful to Atascocita (Texas) | 4,695.18 mi (7,556.17 km) |
| Merthyr Tudful to Atchison (Kansas) | 4,211.63 mi (6,777.97 km) |
| Merthyr Tudful to Athens (Alabama) | 4,123.15 mi (6,635.57 km) |
| Merthyr Tudful to Athens (Georgia) | 4,017.24 mi (6,465.12 km) |
| Merthyr Tudful to Athens (Ohio) | 3,713.69 mi (5,976.60 km) |
| Merthyr Tudful to Athens (Tennessee) | 3,995.61 mi (6,430.32 km) |
| Merthyr Tudful to Athens (Texas) | 4,606.35 mi (7,413.20 km) |
| Merthyr Tudful to Atlanta (Georgia) | 4,069.57 mi (6,549.34 km) |
| Merthyr Tudful to Atlantic Beach (Florida) | 4,111.64 mi (6,617.04 km) |
| Merthyr Tudful to Atlantic City (New Jersey) | 3,399.34 mi (5,470.70 km) |
| Merthyr Tudful to Attleboro (Massachusetts) | 3,160.38 mi (5,086.14 km) |
