| Rock Island to Horizon West (Florida) | 1,032.12 mi (1,661.04 km) |
| Rock Island to Hormigueros (Puerto Rico) | 2,124.73 mi (3,419.42 km) |
| Rock Island to Horn Lake (Mississippi) | 451.32 mi (726.33 km) |
| Rock Island to Hot Springs (Arkansas) | 500.63 mi (805.68 km) |
| Rock Island to Hot Springs Village (Arkansas) | 488.20 mi (785.68 km) |
| Rock Island to Houma (Louisiana) | 821.54 mi (1,322.14 km) |
| Rock Island to Houston (Texas) | 850.81 mi (1,369.25 km) |
| Rock Island to Howard (Wisconsin) | 248.38 mi (399.73 km) |
| Rock Island to Huber Heights (Ohio) | 356.76 mi (574.15 km) |
| Rock Island to Hudson (Florida) | 1,009.10 mi (1,623.99 km) |
| Rock Island to Hudson (Ohio) | 474.18 mi (763.11 km) |
| Rock Island to Hudson (Wisconsin) | 264.52 mi (425.70 km) |
| Rock Island to Hueytown (Alabama) | 589.09 mi (948.05 km) |
| Rock Island to Hugo (Minnesota) | 281.96 mi (453.78 km) |
| Rock Island to Humacao (Puerto Rico) | 2,174.81 mi (3,500.01 km) |
