| Merthyr Tudful to Hazleton (Pennsylvania) | 3,393.51 mi (5,461.33 km) |
| Merthyr Tudful to Healdsburg (California) | 5,209.85 mi (8,384.44 km) |
| Merthyr Tudful to Heath (Ohio) | 3,695.84 mi (5,947.87 km) |
| Merthyr Tudful to Heber (Utah) | 4,741.81 mi (7,631.20 km) |
| Merthyr Tudful to Helena (Alabama) | 4,193.36 mi (6,748.56 km) |
| Merthyr Tudful to Helena (Montana) | 4,439.00 mi (7,143.88 km) |
| Merthyr Tudful to Hemet (California) | 5,300.61 mi (8,530.50 km) |
| Merthyr Tudful to Henderson (Kentucky) | 4,001.85 mi (6,440.35 km) |
| Merthyr Tudful to Henderson (Nevada) | 5,107.96 mi (8,220.47 km) |
| Merthyr Tudful to Henderson (North Carolina) | 3,700.75 mi (5,955.78 km) |
| Merthyr Tudful to Henderson (Texas) | 4,567.80 mi (7,351.16 km) |
| Merthyr Tudful to Hendersonville (North Carolina) | 3,914.19 mi (6,299.28 km) |
| Merthyr Tudful to Hendersonville (Tennessee) | 4,035.74 mi (6,494.90 km) |
| Merthyr Tudful to Hercules (California) | 5,226.74 mi (8,411.62 km) |
| Merthyr Tudful to Hereford (Texas) | 4,723.57 mi (7,601.86 km) |
