| Rock Island to Hillcrest Heights (Maryland) | 740.96 mi (1,192.46 km) |
| Rock Island to Hilliard (Ohio) | 400.92 mi (645.22 km) |
| Rock Island to Hillsboro (Oregon) | 1,634.14 mi (2,629.90 km) |
| Rock Island to Hillsborough (California) | 1,705.39 mi (2,744.56 km) |
| Rock Island to Hillsborough (New Jersey) | 832.32 mi (1,339.49 km) |
| Rock Island to Hilo (Hawaii) | 4,022.00 mi (6,472.78 km) |
| Rock Island to Hilton Head Island (South Carolina) | 839.56 mi (1,351.14 km) |
| Rock Island to Hinesville (Georgia) | 830.41 mi (1,336.41 km) |
| Rock Island to Hinsdale (Illinois) | 139.01 mi (223.71 km) |
| Rock Island to Hobart (Indiana) | 171.31 mi (275.70 km) |
| Rock Island to Hobbs (New Mexico) | 917.60 mi (1,476.73 km) |
| Rock Island to Hobe Sound (Florida) | 1,157.60 mi (1,862.98 km) |
| Rock Island to Hoboken (New Jersey) | 861.97 mi (1,387.21 km) |
| Rock Island to Hockessin (Delaware) | 789.03 mi (1,269.83 km) |
| Rock Island to Hoffman Estates (Illinois) | 132.07 mi (212.54 km) |
