| Merthyr Tudful to Hoddesdon | 143.84 mi (231.49 km) |
| Merthyr Tudful to Holbeach | 161.08 mi (259.23 km) |
| Merthyr Tudful to Holborn | 140.83 mi (226.65 km) |
| Merthyr Tudful to Hollinwood | 133.13 mi (214.24 km) |
| Merthyr Tudful to Holyhead | 120.37 mi (193.72 km) |
| Merthyr Tudful to Holywell | 105.98 mi (170.56 km) |
| Merthyr Tudful to Honiton | 65.66 mi (105.67 km) |
| Merthyr Tudful to Horbury | 152.79 mi (245.90 km) |
| Merthyr Tudful to Horley | 143.50 mi (230.94 km) |
| Merthyr Tudful to Hornchurch | 154.46 mi (248.58 km) |
| Merthyr Tudful to Horndean | 117.72 mi (189.45 km) |
| Merthyr Tudful to Hornsey | 140.11 mi (225.49 km) |
| Merthyr Tudful to Horsell | 124.37 mi (200.15 km) |
| Merthyr Tudful to Horsforth | 161.82 mi (260.42 km) |
| Merthyr Tudful to Horsham | 139.74 mi (224.89 km) |
