| Round Rock to Harrison (Ohio) | 945.13 mi (1,521.03 km) |
| Round Rock to Harrison (Wisconsin) | 1,073.66 mi (1,727.89 km) |
| Round Rock to Harrisonburg (Virginia) | 1,198.44 mi (1,928.71 km) |
| Round Rock to Hartford (Connecticut) | 1,586.99 mi (2,554.01 km) |
| Round Rock to Hartford (Wisconsin) | 1,020.53 mi (1,642.39 km) |
| Round Rock to Hartselle (Alabama) | 680.52 mi (1,095.19 km) |
| Round Rock to Hartsville (Tennessee) | 776.45 mi (1,249.57 km) |
| Round Rock to Harvey (Illinois) | 946.58 mi (1,523.37 km) |
| Round Rock to Harvey (Louisiana) | 455.72 mi (733.41 km) |
| Round Rock to Hasbrouck Heights (New Jersey) | 1,497.16 mi (2,409.44 km) |
| Round Rock to Haslett (Michigan) | 1,117.05 mi (1,797.72 km) |
| Round Rock to Hastings (Minnesota) | 1,015.65 mi (1,634.53 km) |
| Round Rock to Hastings (Nebraska) | 696.89 mi (1,121.54 km) |
| Round Rock to Hattiesburg (Mississippi) | 497.59 mi (800.80 km) |
| Round Rock to Hauppauge (New York) | 1,538.47 mi (2,475.93 km) |
