| Grayslake to Hormigueros (Puerto Rico) | 2,074.05 mi (3,337.86 km) |
| Grayslake to Horn Lake (Mississippi) | 521.97 mi (840.03 km) |
| Grayslake to Hot Springs (Arkansas) | 606.36 mi (975.84 km) |
| Grayslake to Hot Springs Village (Arkansas) | 593.82 mi (955.65 km) |
| Grayslake to Houma (Louisiana) | 894.11 mi (1,438.92 km) |
| Grayslake to Houston (Texas) | 958.82 mi (1,543.08 km) |
| Grayslake to Howard (Wisconsin) | 154.09 mi (247.99 km) |
| Grayslake to Huber Heights (Ohio) | 266.51 mi (428.91 km) |
| Grayslake to Hudson (Florida) | 1,011.29 mi (1,627.51 km) |
| Grayslake to Hudson (Ohio) | 347.95 mi (559.97 km) |
| Grayslake to Hudson (Wisconsin) | 296.56 mi (477.27 km) |
| Grayslake to Hueytown (Alabama) | 618.53 mi (995.43 km) |
| Grayslake to Hugo (Minnesota) | 313.84 mi (505.07 km) |
| Grayslake to Humacao (Puerto Rico) | 2,119.44 mi (3,410.92 km) |
| Grayslake to Humble (Texas) | 942.83 mi (1,517.34 km) |
