| Tomball to Hazelwood (Missouri) | 670.47 mi (1,079.01 km) |
| Tomball to Hazleton (Pennsylvania) | 1,330.36 mi (2,141.01 km) |
| Tomball to Healdsburg (California) | 1,654.31 mi (2,662.35 km) |
| Tomball to Heath (Ohio) | 1,010.87 mi (1,626.84 km) |
| Tomball to Heber (Utah) | 1,141.08 mi (1,836.40 km) |
| Tomball to Helena (Alabama) | 558.84 mi (899.37 km) |
| Tomball to Helena (Montana) | 1,439.40 mi (2,316.50 km) |
| Tomball to Hemet (California) | 1,276.27 mi (2,053.96 km) |
| Tomball to Henderson (Kentucky) | 705.48 mi (1,135.35 km) |
| Tomball to Henderson (Nevada) | 1,194.00 mi (1,921.56 km) |
| Tomball to Henderson (North Carolina) | 1,081.65 mi (1,740.75 km) |
| Tomball to Henderson (Texas) | 150.60 mi (242.36 km) |
| Tomball to Hendersonville (North Carolina) | 845.22 mi (1,360.25 km) |
| Tomball to Hendersonville (Tennessee) | 674.78 mi (1,085.95 km) |
| Tomball to Hercules (California) | 1,613.06 mi (2,595.97 km) |
