| Round Rock to Home Gardens (California) | 1,181.26 mi (1,901.06 km) |
| Round Rock to Homer Glen (Illinois) | 936.77 mi (1,507.59 km) |
| Round Rock to Homestead (Florida) | 1,105.60 mi (1,779.30 km) |
| Round Rock to Homewood (Alabama) | 667.23 mi (1,073.81 km) |
| Round Rock to Homewood (Illinois) | 943.69 mi (1,518.72 km) |
| Round Rock to Homosassa Springs (Florida) | 915.02 mi (1,472.58 km) |
| Round Rock to Honeygo (Maryland) | 1,345.16 mi (2,164.83 km) |
| Round Rock to Honolulu (Hawaii) | 3,750.79 mi (6,036.31 km) |
| Round Rock to Hoover (Alabama) | 665.88 mi (1,071.62 km) |
| Round Rock to Hopatcong (New Jersey) | 1,471.06 mi (2,367.45 km) |
| Round Rock to Hope Mills (North Carolina) | 1,127.51 mi (1,814.56 km) |
| Round Rock to Hopewell (Virginia) | 1,254.59 mi (2,019.06 km) |
| Round Rock to Hopkins (Minnesota) | 1,021.33 mi (1,643.67 km) |
| Round Rock to Hopkinsville (Kentucky) | 729.43 mi (1,173.91 km) |
| Round Rock to Horizon City (Texas) | 510.52 mi (821.60 km) |
