| Merthyr Tudful to Hanahan (South Carolina) | 3,926.72 mi (6,319.45 km) |
| Merthyr Tudful to Hanford (California) | 5,241.26 mi (8,434.99 km) |
| Merthyr Tudful to Hannibal (Missouri) | 4,061.97 mi (6,537.11 km) |
| Merthyr Tudful to Hanover (Pennsylvania) | 3,484.43 mi (5,607.64 km) |
| Merthyr Tudful to Hanover Park (Illinois) | 3,830.73 mi (6,164.97 km) |
| Merthyr Tudful to Happy Valley (Oregon) | 4,811.52 mi (7,743.40 km) |
| Merthyr Tudful to Harker Heights (Texas) | 4,736.56 mi (7,622.76 km) |
| Merthyr Tudful to Harlingen (Texas) | 4,992.53 mi (8,034.69 km) |
| Merthyr Tudful to Harper Woods (Michigan) | 3,607.42 mi (5,805.59 km) |
| Merthyr Tudful to Harrisburg (North Carolina) | 3,840.32 mi (6,180.39 km) |
| Merthyr Tudful to Harrisburg (Pennsylvania) | 3,460.03 mi (5,568.38 km) |
| Merthyr Tudful to Harrison (Arkansas) | 4,297.08 mi (6,915.49 km) |
| Merthyr Tudful to Harrison (New Jersey) | 3,327.95 mi (5,355.82 km) |
| Merthyr Tudful to Harrison (New York) | 3,298.16 mi (5,307.87 km) |
| Merthyr Tudful to Harrison (Ohio) | 3,824.44 mi (6,154.84 km) |
