| Round Rock to Hillcrest Heights (Maryland) | 1,304.65 mi (2,099.63 km) |
| Round Rock to Hilliard (Ohio) | 1,046.90 mi (1,684.82 km) |
| Round Rock to Hillsboro (Oregon) | 1,709.82 mi (2,751.69 km) |
| Round Rock to Hillsborough (California) | 1,489.65 mi (2,397.36 km) |
| Round Rock to Hillsborough (New Jersey) | 1,460.09 mi (2,349.79 km) |
| Round Rock to Hilo (Hawaii) | 3,632.07 mi (5,845.25 km) |
| Round Rock to Hilton Head Island (South Carolina) | 1,003.49 mi (1,614.97 km) |
| Round Rock to Hinesville (Georgia) | 952.18 mi (1,532.38 km) |
| Round Rock to Hinsdale (Illinois) | 948.16 mi (1,525.92 km) |
| Round Rock to Hobart (Indiana) | 954.19 mi (1,535.63 km) |
| Round Rock to Hobbs (New Mexico) | 357.24 mi (574.92 km) |
| Round Rock to Hobe Sound (Florida) | 1,086.16 mi (1,748.00 km) |
| Round Rock to Hoboken (New Jersey) | 1,496.54 mi (2,408.45 km) |
| Round Rock to Hockessin (Delaware) | 1,391.56 mi (2,239.51 km) |
| Round Rock to Hoffman Estates (Illinois) | 955.82 mi (1,538.25 km) |
