| Houston to Altus (Oklahoma) | 406.95 mi (654.92 km) |
| Houston to Alum Rock (California) | 1,602.99 mi (2,579.77 km) |
| Houston to Alvin (Texas) | 28.14 mi (45.28 km) |
| Houston to Amarillo (Texas) | 529.68 mi (852.44 km) |
| Houston to Amelia (Ohio) | 900.19 mi (1,448.72 km) |
| Houston to American Canyon (California) | 1,637.81 mi (2,635.79 km) |
| Houston to American Fork (Utah) | 1,178.18 mi (1,896.10 km) |
| Houston to Americus (Georgia) | 679.91 mi (1,094.21 km) |
| Houston to Ames (Iowa) | 851.38 mi (1,370.16 km) |
| Houston to Amherst (Ohio) | 1,088.63 mi (1,751.99 km) |
| Houston to Ammon (Idaho) | 1,313.64 mi (2,114.10 km) |
| Houston to Amsterdam (New York) | 1,481.74 mi (2,384.63 km) |
| Houston to Anacortes (Washington) | 1,930.76 mi (3,107.26 km) |
| Houston to Anaheim (California) | 1,345.73 mi (2,165.74 km) |
| Houston to Anchorage (Alaska) | 3,242.50 mi (5,218.30 km) |
