| Grays to Hoyo de Manzanares | 775.51 mi (1,248.07 km) |
| Grays to Huelva | 1,045.30 mi (1,682.25 km) |
| Grays to Huercal de Almeria | 1,017.25 mi (1,637.11 km) |
| Grays to Huercal-Overa | 979.90 mi (1,577.00 km) |
| Grays to Huesca | 646.40 mi (1,040.29 km) |
| Grays to Huetor Vega | 1,007.96 mi (1,622.16 km) |
| Grays to Huetor-Tajar | 1,009.63 mi (1,624.84 km) |
| Grays to Humanes de Madrid | 800.35 mi (1,288.05 km) |
| Grays to Ibi | 888.78 mi (1,430.35 km) |
| Grays to Ibiza | 869.87 mi (1,399.91 km) |
| Grays to Icod de los Vinos | 1,824.93 mi (2,936.94 km) |
| Grays to Igualada | 686.30 mi (1,104.49 km) |
| Grays to Illescas | 809.66 mi (1,303.02 km) |
| Grays to Inca | 821.85 mi (1,322.64 km) |
| Grays to Ingenio | 1,821.57 mi (2,931.53 km) |
