| Round Rock to Havelock (North Carolina) | 1,241.97 mi (1,998.76 km) |
| Round Rock to Haverhill (Massachusetts) | 1,688.55 mi (2,717.46 km) |
| Round Rock to Havre de Grace (Maryland) | 1,364.28 mi (2,195.60 km) |
| Round Rock to Hawaiian Gardens (California) | 1,212.99 mi (1,952.12 km) |
| Round Rock to Hawaiian Paradise Park (Hawaii) | 3,628.08 mi (5,838.83 km) |
| Round Rock to Hawthorne (California) | 1,229.23 mi (1,978.25 km) |
| Round Rock to Hawthorne (New Jersey) | 1,495.46 mi (2,406.71 km) |
| Round Rock to Hayden (Idaho) | 1,563.04 mi (2,515.46 km) |
| Round Rock to Hayesville (Oregon) | 1,693.67 mi (2,725.71 km) |
| Round Rock to Hays (Kansas) | 584.88 mi (941.27 km) |
| Round Rock to Haysville (Kansas) | 486.59 mi (783.09 km) |
| Round Rock to Hayward (California) | 1,475.62 mi (2,374.79 km) |
| Round Rock to Hazel Crest (Illinois) | 943.50 mi (1,518.41 km) |
| Round Rock to Hazel Dell (Washington) | 1,703.02 mi (2,740.75 km) |
| Round Rock to Hazel Park (Michigan) | 1,152.01 mi (1,853.97 km) |
