| Harpenden to Hamilton | 312.11 mi (502.29 km) |
| Harpenden to Hammersmith | 23.11 mi (37.19 km) |
| Harpenden to Hampton | 27.33 mi (43.99 km) |
| Harpenden to Hamworthy | 104.32 mi (167.88 km) |
| Harpenden to Handsworth | 115.93 mi (186.56 km) |
| Harpenden to Hanwell | 21.32 mi (34.32 km) |
| Harpenden to Harborne | 80.99 mi (130.35 km) |
| Harpenden to Harlow | 20.70 mi (33.31 km) |
| Harpenden to Harrogate | 158.14 mi (254.51 km) |
| Harpenden to Harrow | 16.16 mi (26.01 km) |
| Harpenden to Harrow on the Hill | 17.43 mi (28.05 km) |
| Harpenden to Harrow Weald | 14.76 mi (23.76 km) |
| Harpenden to Hartlepool | 201.61 mi (324.46 km) |
| Harpenden to Harwich | 69.50 mi (111.85 km) |
| Harpenden to Haslemere | 52.60 mi (84.64 km) |
