| Tomball to Altus (Oklahoma) | 381.51 mi (613.98 km) |
| Tomball to Alum Rock (California) | 1,581.25 mi (2,544.77 km) |
| Tomball to Alvin (Texas) | 52.67 mi (84.76 km) |
| Tomball to Amarillo (Texas) | 504.69 mi (812.23 km) |
| Tomball to Amelia (Ohio) | 893.82 mi (1,438.46 km) |
| Tomball to American Canyon (California) | 1,615.65 mi (2,600.14 km) |
| Tomball to American Fork (Utah) | 1,153.55 mi (1,856.46 km) |
| Tomball to Americus (Georgia) | 687.60 mi (1,106.59 km) |
| Tomball to Ames (Iowa) | 831.76 mi (1,338.60 km) |
| Tomball to Amherst (Ohio) | 1,080.96 mi (1,739.64 km) |
| Tomball to Ammon (Idaho) | 1,288.37 mi (2,073.43 km) |
| Tomball to Amsterdam (New York) | 1,477.20 mi (2,377.32 km) |
| Tomball to Anacortes (Washington) | 1,905.54 mi (3,066.67 km) |
| Tomball to Anaheim (California) | 1,326.14 mi (2,134.22 km) |
| Tomball to Anchorage (Alaska) | 3,217.06 mi (5,177.36 km) |
