| Key Largo to Hoyo de Manzanares | 4,430.02 mi (7,129.43 km) |
| Key Largo to Huelva | 4,316.64 mi (6,946.95 km) |
| Key Largo to Huercal de Almeria | 4,564.89 mi (7,346.49 km) |
| Key Largo to Huercal-Overa | 4,583.00 mi (7,375.63 km) |
| Key Largo to Huesca | 4,582.98 mi (7,375.60 km) |
| Key Largo to Huetor Vega | 4,499.77 mi (7,241.67 km) |
| Key Largo to Huetor-Tajar | 4,473.37 mi (7,199.19 km) |
| Key Largo to Humanes de Madrid | 4,438.31 mi (7,142.77 km) |
| Key Largo to Ibi | 4,633.09 mi (7,456.24 km) |
| Key Largo to Ibiza | 4,732.48 mi (7,616.20 km) |
| Key Largo to Icod de los Vinos | 3,891.61 mi (6,262.94 km) |
| Key Largo to Igualada | 4,693.93 mi (7,554.15 km) |
| Key Largo to Illescas | 4,440.01 mi (7,145.51 km) |
| Key Largo to Inca | 4,793.58 mi (7,714.52 km) |
| Key Largo to Ingenio | 3,973.54 mi (6,394.79 km) |
