| Houston to Amelia | 5,660.66 mi (9,109.95 km) |
| Houston to Anagni | 5,723.23 mi (9,210.65 km) |
| Houston to Ancona | 5,665.93 mi (9,118.43 km) |
| Houston to Andria | 5,877.30 mi (9,458.61 km) |
| Houston to Angri | 5,823.01 mi (9,371.22 km) |
| Houston to Anguillara Sabazia | 5,672.02 mi (9,128.23 km) |
| Houston to Anzio | 5,711.83 mi (9,192.30 km) |
| Houston to Anzola dell'Emilia | 5,534.34 mi (8,906.66 km) |
| Houston to Aosta | 5,330.15 mi (8,578.05 km) |
| Houston to Apricena | 5,818.70 mi (9,364.30 km) |
| Houston to Aprilia | 5,707.55 mi (9,185.41 km) |
| Houston to Aradeo | 5,999.05 mi (9,654.54 km) |
| Houston to Aragona | 5,912.49 mi (9,515.24 km) |
| Houston to Arco | 5,471.07 mi (8,804.83 km) |
| Houston to Arcola | 5,495.82 mi (8,844.67 km) |
