| Houston to Hoyo de Manzanares | 4,986.45 mi (8,024.91 km) |
| Houston to Huelva | 4,930.95 mi (7,935.60 km) |
| Houston to Huercal de Almeria | 5,167.47 mi (8,316.24 km) |
| Houston to Huercal-Overa | 5,176.98 mi (8,331.54 km) |
| Houston to Huesca | 5,105.32 mi (8,216.22 km) |
| Houston to Huetor Vega | 5,103.15 mi (8,212.73 km) |
| Houston to Huetor-Tajar | 5,077.96 mi (8,172.18 km) |
| Houston to Humanes de Madrid | 4,999.92 mi (8,046.60 km) |
| Houston to Ibi | 5,204.95 mi (8,376.56 km) |
| Houston to Ibiza | 5,292.35 mi (8,517.22 km) |
| Houston to Icod de los Vinos | 4,650.85 mi (7,484.82 km) |
| Houston to Igualada | 5,216.17 mi (8,394.61 km) |
| Houston to Illescas | 5,003.58 mi (8,052.49 km) |
| Houston to Inca | 5,336.25 mi (8,587.86 km) |
| Houston to Ingenio | 4,733.51 mi (7,617.85 km) |
