| Romeoville to Hoyo de Manzanares | 4,192.12 mi (6,746.56 km) |
| Romeoville to Huelva | 4,174.53 mi (6,718.26 km) |
| Romeoville to Huercal de Almeria | 4,397.57 mi (7,077.20 km) |
| Romeoville to Huercal-Overa | 4,401.30 mi (7,083.21 km) |
| Romeoville to Huesca | 4,289.99 mi (6,904.07 km) |
| Romeoville to Huetor Vega | 4,335.24 mi (6,976.89 km) |
| Romeoville to Huetor-Tajar | 4,311.42 mi (6,938.57 km) |
| Romeoville to Humanes de Madrid | 4,208.33 mi (6,772.65 km) |
| Romeoville to Ibi | 4,415.07 mi (7,105.37 km) |
| Romeoville to Ibiza | 4,493.73 mi (7,231.96 km) |
| Romeoville to Icod de los Vinos | 4,029.05 mi (6,484.12 km) |
| Romeoville to Igualada | 4,398.73 mi (7,079.08 km) |
| Romeoville to Illescas | 4,213.06 mi (6,780.27 km) |
| Romeoville to Inca | 4,527.28 mi (7,285.95 km) |
| Romeoville to Ingenio | 4,109.68 mi (6,613.89 km) |
