| Houston to Argentona | 5,252.86 mi (8,453.67 km) |
| Houston to Arico el Nuevo | 4,666.47 mi (7,509.95 km) |
| Houston to Armilla | 5,100.66 mi (8,208.73 km) |
| Houston to Arnedo | 5,024.96 mi (8,086.90 km) |
| Houston to Arona | 4,658.62 mi (7,497.32 km) |
| Houston to Arrecife | 4,809.80 mi (7,740.62 km) |
| Houston to Arrigorriaga | 4,960.27 mi (7,982.78 km) |
| Houston to Arroyomolinos | 4,996.09 mi (8,040.43 km) |
| Houston to Arteijo | 4,696.14 mi (7,557.70 km) |
| Houston to Arucas | 4,723.05 mi (7,601.01 km) |
| Houston to Aspe | 5,204.31 mi (8,375.52 km) |
| Houston to Astorga | 4,832.88 mi (7,777.78 km) |
| Houston to Atarfe | 5,094.86 mi (8,199.39 km) |
| Houston to Avila | 4,947.68 mi (7,962.53 km) |
| Houston to Aviles | 4,811.28 mi (7,743.01 km) |
