| Grayslake to Hoyo de Manzanares | 4,164.84 mi (6,702.66 km) |
| Grayslake to Huelva | 4,150.73 mi (6,679.95 km) |
| Grayslake to Huercal de Almeria | 4,372.36 mi (7,036.64 km) |
| Grayslake to Huercal-Overa | 4,375.57 mi (7,041.80 km) |
| Grayslake to Huesca | 4,260.59 mi (6,856.76 km) |
| Grayslake to Huetor Vega | 4,310.27 mi (6,936.70 km) |
| Grayslake to Huetor-Tajar | 4,286.60 mi (6,898.61 km) |
| Grayslake to Humanes de Madrid | 4,181.29 mi (6,729.14 km) |
| Grayslake to Ibi | 4,388.03 mi (7,061.86 km) |
| Grayslake to Ibiza | 4,465.81 mi (7,187.03 km) |
| Grayslake to Icod de los Vinos | 4,016.23 mi (6,463.50 km) |
| Grayslake to Igualada | 4,369.05 mi (7,031.30 km) |
| Grayslake to Illescas | 4,186.13 mi (6,736.92 km) |
| Grayslake to Inca | 4,498.34 mi (7,239.38 km) |
| Grayslake to Ingenio | 4,096.60 mi (6,592.84 km) |
