| Merthyr Tudful to Homer Glen (Illinois) | 3,840.54 mi (6,180.75 km) |
| Merthyr Tudful to Homestead (Florida) | 4,313.92 mi (6,942.59 km) |
| Merthyr Tudful to Homewood (Alabama) | 4,181.79 mi (6,729.94 km) |
| Merthyr Tudful to Homewood (Illinois) | 3,831.46 mi (6,166.13 km) |
| Merthyr Tudful to Homosassa Springs (Florida) | 4,234.36 mi (6,814.54 km) |
| Merthyr Tudful to Honeygo (Maryland) | 3,479.58 mi (5,599.84 km) |
| Merthyr Tudful to Honolulu (Hawaii) | 7,156.83 mi (11,517.80 km) |
| Merthyr Tudful to Hoover (Alabama) | 4,185.88 mi (6,736.53 km) |
| Merthyr Tudful to Hopatcong (New Jersey) | 3,339.68 mi (5,374.70 km) |
| Merthyr Tudful to Hope Mills (North Carolina) | 3,786.42 mi (6,093.66 km) |
| Merthyr Tudful to Hopewell (Virginia) | 3,610.25 mi (5,810.14 km) |
| Merthyr Tudful to Hopkins (Minnesota) | 3,892.45 mi (6,264.29 km) |
| Merthyr Tudful to Hopkinsville (Kentucky) | 4,045.48 mi (6,510.57 km) |
| Merthyr Tudful to Horizon City (Texas) | 5,030.70 mi (8,096.13 km) |
| Merthyr Tudful to Horizon West (Florida) | 4,213.92 mi (6,781.64 km) |
