| Round Rock to Horizon West (Florida) | 975.13 mi (1,569.33 km) |
| Round Rock to Hormigueros (Puerto Rico) | 2,095.46 mi (3,372.32 km) |
| Round Rock to Horn Lake (Mississippi) | 537.55 mi (865.10 km) |
| Round Rock to Hot Springs (Arkansas) | 383.60 mi (617.35 km) |
| Round Rock to Hot Springs Village (Arkansas) | 395.20 mi (636.01 km) |
| Round Rock to Houma (Louisiana) | 421.18 mi (677.82 km) |
| Round Rock to Houston (Texas) | 145.27 mi (233.79 km) |
| Round Rock to Howard (Wisconsin) | 1,101.05 mi (1,771.98 km) |
| Round Rock to Huber Heights (Ohio) | 998.55 mi (1,607.01 km) |
| Round Rock to Hudson (Florida) | 912.67 mi (1,468.80 km) |
| Round Rock to Hudson (Ohio) | 1,168.16 mi (1,879.97 km) |
| Round Rock to Hudson (Wisconsin) | 1,032.73 mi (1,662.02 km) |
| Round Rock to Hueytown (Alabama) | 654.69 mi (1,053.62 km) |
| Round Rock to Hugo (Minnesota) | 1,043.11 mi (1,678.72 km) |
| Round Rock to Humacao (Puerto Rico) | 2,169.38 mi (3,491.29 km) |
