| Harrow Weald to Hoyo de Manzanares | 776.53 mi (1,249.71 km) |
| Harrow Weald to Huelva | 1,042.97 mi (1,678.49 km) |
| Harrow Weald to Huercal de Almeria | 1,022.26 mi (1,645.17 km) |
| Harrow Weald to Huercal-Overa | 985.63 mi (1,586.22 km) |
| Harrow Weald to Huesca | 654.37 mi (1,053.11 km) |
| Harrow Weald to Huetor Vega | 1,011.05 mi (1,627.14 km) |
| Harrow Weald to Huetor-Tajar | 1,011.93 mi (1,628.54 km) |
| Harrow Weald to Humanes de Madrid | 801.69 mi (1,290.20 km) |
| Harrow Weald to Ibi | 896.68 mi (1,443.07 km) |
| Harrow Weald to Ibiza | 881.30 mi (1,418.31 km) |
| Harrow Weald to Icod de los Vinos | 1,815.87 mi (2,922.37 km) |
| Harrow Weald to Igualada | 698.65 mi (1,124.37 km) |
| Harrow Weald to Illescas | 811.06 mi (1,305.28 km) |
| Harrow Weald to Inca | 836.02 mi (1,345.45 km) |
| Harrow Weald to Ingenio | 1,813.88 mi (2,919.16 km) |
