| Grayslake to Hutchinson (Minnesota) | 362.62 mi (583.58 km) |
| Grayslake to Hutto (Texas) | 970.27 mi (1,561.49 km) |
| Grayslake to Hyattsville (Maryland) | 625.33 mi (1,006.38 km) |
| Grayslake to Hybla Valley (Virginia) | 625.67 mi (1,006.92 km) |
| Grayslake to Idaho Falls (Idaho) | 1,212.95 mi (1,952.05 km) |
| Grayslake to Idylwood (Virginia) | 615.36 mi (990.33 km) |
| Grayslake to Ilchester (Maryland) | 627.03 mi (1,009.11 km) |
| Grayslake to Immokalee (Florida) | 1,161.44 mi (1,869.16 km) |
| Grayslake to Imperial (California) | 1,634.98 mi (2,631.24 km) |
| Grayslake to Imperial Beach (California) | 1,721.33 mi (2,770.21 km) |
| Grayslake to Independence (Kentucky) | 296.95 mi (477.90 km) |
| Grayslake to Independence (Missouri) | 399.76 mi (643.36 km) |
| Grayslake to Indian Trail (North Carolina) | 640.59 mi (1,030.93 km) |
| Grayslake to Indiana (Pennsylvania) | 474.42 mi (763.51 km) |
| Grayslake to Indianapolis (Indiana) | 202.58 mi (326.02 km) |
