| Merthyr Tudful to Hermiston (Oregon) | 4,697.68 mi (7,560.19 km) |
| Merthyr Tudful to Hermitage (Pennsylvania) | 3,561.94 mi (5,732.38 km) |
| Merthyr Tudful to Hermosa Beach (California) | 5,339.74 mi (8,593.48 km) |
| Merthyr Tudful to Hernando (Mississippi) | 4,242.20 mi (6,827.15 km) |
| Merthyr Tudful to Herndon (Virginia) | 3,538.25 mi (5,694.27 km) |
| Merthyr Tudful to Herriman (Utah) | 4,763.21 mi (7,665.65 km) |
| Merthyr Tudful to Herrin (Illinois) | 4,061.19 mi (6,535.85 km) |
| Merthyr Tudful to Hershey (Pennsylvania) | 3,450.06 mi (5,552.33 km) |
| Merthyr Tudful to Hesperia (California) | 5,273.95 mi (8,487.61 km) |
| Merthyr Tudful to Hewitt (Texas) | 4,698.57 mi (7,561.62 km) |
| Merthyr Tudful to Hialeah (Florida) | 4,287.49 mi (6,900.04 km) |
| Merthyr Tudful to Hialeah Gardens (Florida) | 4,288.79 mi (6,902.14 km) |
| Merthyr Tudful to Hibbing (Minnesota) | 3,763.48 mi (6,056.73 km) |
| Merthyr Tudful to Hickory (North Carolina) | 3,847.92 mi (6,192.63 km) |
| Merthyr Tudful to Hickory Hills (Illinois) | 3,830.31 mi (6,164.29 km) |
