| Round Rock to Hamtramck (Michigan) | 1,150.61 mi (1,851.73 km) |
| Round Rock to Hanahan (South Carolina) | 1,049.82 mi (1,689.53 km) |
| Round Rock to Hanford (California) | 1,326.43 mi (2,134.69 km) |
| Round Rock to Hannibal (Missouri) | 726.24 mi (1,168.77 km) |
| Round Rock to Hanover (Pennsylvania) | 1,327.96 mi (2,137.15 km) |
| Round Rock to Hanover Park (Illinois) | 951.33 mi (1,531.02 km) |
| Round Rock to Happy Valley (Oregon) | 1,688.60 mi (2,717.55 km) |
| Round Rock to Harker Heights (Texas) | 36.65 mi (58.99 km) |
| Round Rock to Harlingen (Texas) | 299.55 mi (482.09 km) |
| Round Rock to Harper Woods (Michigan) | 1,157.48 mi (1,862.78 km) |
| Round Rock to Harrisburg (North Carolina) | 1,039.18 mi (1,672.39 km) |
| Round Rock to Harrisburg (Pennsylvania) | 1,345.31 mi (2,165.07 km) |
| Round Rock to Harrison (Arkansas) | 473.93 mi (762.72 km) |
| Round Rock to Harrison (New Jersey) | 1,490.37 mi (2,398.52 km) |
| Round Rock to Harrison (New York) | 1,518.45 mi (2,443.70 km) |
