| Boulder to Hoyo de Manzanares | 4,994.54 mi (8,037.94 km) |
| Boulder to Huelva | 5,006.97 mi (8,057.94 km) |
| Boulder to Huercal de Almeria | 5,217.72 mi (8,397.11 km) |
| Boulder to Huercal-Overa | 5,216.91 mi (8,395.81 km) |
| Boulder to Huesca | 5,070.01 mi (8,159.39 km) |
| Boulder to Huetor Vega | 5,157.64 mi (8,300.41 km) |
| Boulder to Huetor-Tajar | 5,135.13 mi (8,264.19 km) |
| Boulder to Humanes de Madrid | 5,013.00 mi (8,067.64 km) |
| Boulder to Ibi | 5,218.54 mi (8,398.43 km) |
| Boulder to Ibiza | 5,288.07 mi (8,510.32 km) |
| Boulder to Icod de los Vinos | 4,918.82 mi (7,916.08 km) |
| Boulder to Igualada | 5,174.83 mi (8,328.08 km) |
| Boulder to Illescas | 5,018.62 mi (8,076.69 km) |
| Boulder to Inca | 5,310.75 mi (8,546.82 km) |
| Boulder to Ingenio | 4,998.61 mi (8,044.48 km) |
