| Merthyr Tudful to Haverhill (Massachusetts) | 3,116.87 mi (5,016.12 km) |
| Merthyr Tudful to Havre de Grace (Maryland) | 3,460.42 mi (5,569.01 km) |
| Merthyr Tudful to Hawaiian Gardens (California) | 5,331.02 mi (8,579.45 km) |
| Merthyr Tudful to Hawaiian Paradise Park (Hawaii) | 7,218.43 mi (11,616.94 km) |
| Merthyr Tudful to Hawthorne (California) | 5,335.35 mi (8,586.41 km) |
| Merthyr Tudful to Hawthorne (New Jersey) | 3,318.97 mi (5,341.37 km) |
| Merthyr Tudful to Hayden (Idaho) | 4,520.11 mi (7,274.41 km) |
| Merthyr Tudful to Hayesville (Oregon) | 4,850.36 mi (7,805.91 km) |
| Merthyr Tudful to Hays (Kansas) | 4,401.57 mi (7,083.65 km) |
| Merthyr Tudful to Haysville (Kansas) | 4,394.01 mi (7,071.48 km) |
| Merthyr Tudful to Hayward (California) | 5,242.63 mi (8,437.20 km) |
| Merthyr Tudful to Hazel Crest (Illinois) | 3,831.93 mi (6,166.89 km) |
| Merthyr Tudful to Hazel Dell (Washington) | 4,801.87 mi (7,727.86 km) |
| Merthyr Tudful to Hazel Park (Michigan) | 3,613.03 mi (5,814.61 km) |
| Merthyr Tudful to Hazelwood (Missouri) | 4,066.89 mi (6,545.02 km) |
