| Houston to Ascoli Piceno | 5,698.38 mi (9,170.65 km) |
| Houston to Asola | 5,477.46 mi (8,815.11 km) |
| Houston to Asolo | 5,517.40 mi (8,879.39 km) |
| Houston to Assemini | 5,631.96 mi (9,063.76 km) |
| Houston to Assisi | 5,649.12 mi (9,091.38 km) |
| Houston to Asti | 5,396.44 mi (8,684.73 km) |
| Houston to Atessa | 5,765.42 mi (9,278.54 km) |
| Houston to Atri | 5,725.53 mi (9,214.35 km) |
| Houston to Atripalda | 5,826.83 mi (9,377.37 km) |
| Houston to Augusta | 5,990.40 mi (9,640.61 km) |
| Houston to Aulla | 5,495.01 mi (8,843.36 km) |
| Houston to Aurisina | 5,593.80 mi (9,002.35 km) |
| Houston to Avellino | 5,825.26 mi (9,374.85 km) |
| Houston to Aversa | 5,798.07 mi (9,331.08 km) |
| Houston to Avezzano | 5,723.66 mi (9,211.35 km) |
