| Round Rock to Hazelwood (Missouri) | 704.49 mi (1,133.77 km) |
| Round Rock to Hazleton (Pennsylvania) | 1,407.86 mi (2,265.73 km) |
| Round Rock to Healdsburg (California) | 1,532.72 mi (2,466.67 km) |
| Round Rock to Heath (Ohio) | 1,078.06 mi (1,734.97 km) |
| Round Rock to Heber (Utah) | 1,033.10 mi (1,662.61 km) |
| Round Rock to Helena (Alabama) | 660.27 mi (1,062.61 km) |
| Round Rock to Helena (Montana) | 1,349.66 mi (2,172.06 km) |
| Round Rock to Hemet (California) | 1,150.85 mi (1,852.12 km) |
| Round Rock to Henderson (Kentucky) | 765.62 mi (1,232.14 km) |
| Round Rock to Henderson (Nevada) | 1,070.95 mi (1,723.52 km) |
| Round Rock to Henderson (North Carolina) | 1,177.56 mi (1,895.09 km) |
| Round Rock to Henderson (Texas) | 203.31 mi (327.19 km) |
| Round Rock to Hendersonville (North Carolina) | 940.89 mi (1,514.22 km) |
| Round Rock to Hendersonville (Tennessee) | 751.96 mi (1,210.16 km) |
| Round Rock to Hercules (California) | 1,490.80 mi (2,399.21 km) |
