| Romeoville to Hutchinson (Kansas) | 575.17 mi (925.64 km) |
| Romeoville to Hutchinson (Minnesota) | 387.50 mi (623.62 km) |
| Romeoville to Hutto (Texas) | 928.96 mi (1,495.02 km) |
| Romeoville to Hyattsville (Maryland) | 615.09 mi (989.88 km) |
| Romeoville to Hybla Valley (Virginia) | 614.16 mi (988.40 km) |
| Romeoville to Idaho Falls (Idaho) | 1,220.66 mi (1,964.47 km) |
| Romeoville to Idylwood (Virginia) | 604.33 mi (972.58 km) |
| Romeoville to Ilchester (Maryland) | 618.36 mi (995.15 km) |
| Romeoville to Immokalee (Florida) | 1,117.09 mi (1,797.78 km) |
| Romeoville to Imperial (California) | 1,620.00 mi (2,607.13 km) |
| Romeoville to Imperial Beach (California) | 1,707.21 mi (2,747.50 km) |
| Romeoville to Independence (Kentucky) | 263.24 mi (423.65 km) |
| Romeoville to Independence (Missouri) | 372.97 mi (600.23 km) |
| Romeoville to Indian Trail (North Carolina) | 606.72 mi (976.42 km) |
| Romeoville to Indiana (Pennsylvania) | 470.49 mi (757.18 km) |
