| Merthyr Tudful to Ansonia (Connecticut) | 3,257.85 mi (5,243.01 km) |
| Merthyr Tudful to Antelope (California) | 5,158.94 mi (8,302.51 km) |
| Merthyr Tudful to Anthem (Arizona) | 5,126.75 mi (8,250.70 km) |
| Merthyr Tudful to Antioch (California) | 5,214.25 mi (8,391.53 km) |
| Merthyr Tudful to Antioch (Illinois) | 3,805.46 mi (6,124.30 km) |
| Merthyr Tudful to Apache Junction (Arizona) | 5,131.36 mi (8,258.12 km) |
| Merthyr Tudful to Apex (North Carolina) | 3,747.69 mi (6,031.32 km) |
| Merthyr Tudful to Apollo Beach (Florida) | 4,280.96 mi (6,889.54 km) |
| Merthyr Tudful to Apopka (Florida) | 4,197.50 mi (6,755.22 km) |
| Merthyr Tudful to Apple Valley (California) | 5,262.78 mi (8,469.62 km) |
| Merthyr Tudful to Apple Valley (Minnesota) | 3,893.29 mi (6,265.65 km) |
| Merthyr Tudful to Appleton (Wisconsin) | 3,736.05 mi (6,012.60 km) |
| Merthyr Tudful to Arbutus (Maryland) | 3,497.62 mi (5,628.87 km) |
| Merthyr Tudful to Arcadia (California) | 5,312.71 mi (8,549.98 km) |
| Merthyr Tudful to Arcata (California) | 5,116.91 mi (8,234.87 km) |
