| Gretna to Hoddesdon | 4,626.81 mi (7,446.14 km) |
| Gretna to Holbeach | 4,604.02 mi (7,409.46 km) |
| Gretna to Holborn | 4,628.37 mi (7,448.65 km) |
| Gretna to Hollinwood | 4,503.59 mi (7,247.83 km) |
| Gretna to Holyhead | 4,409.44 mi (7,096.31 km) |
| Gretna to Holywell | 4,466.04 mi (7,187.39 km) |
| Gretna to Honiton | 4,518.12 mi (7,271.22 km) |
| Gretna to Horbury | 4,523.62 mi (7,280.06 km) |
| Gretna to Horley | 4,634.07 mi (7,457.81 km) |
| Gretna to Hornchurch | 4,640.73 mi (7,468.54 km) |
| Gretna to Horndean | 4,606.34 mi (7,413.18 km) |
| Gretna to Hornsey | 4,626.65 mi (7,445.87 km) |
| Gretna to Horsell | 4,614.61 mi (7,426.50 km) |
| Gretna to Horsforth | 4,516.53 mi (7,268.66 km) |
| Gretna to Horsham | 4,630.43 mi (7,451.96 km) |
