| Portland to Argentona | 5,532.48 mi (8,903.66 km) |
| Portland to Arico el Nuevo | 5,560.55 mi (8,948.84 km) |
| Portland to Armilla | 5,582.03 mi (8,983.41 km) |
| Portland to Arnedo | 5,356.98 mi (8,621.23 km) |
| Portland to Arona | 5,557.52 mi (8,943.96 km) |
| Portland to Arrecife | 5,642.05 mi (9,080.01 km) |
| Portland to Arrigorriaga | 5,278.53 mi (8,494.98 km) |
| Portland to Arroyomolinos | 5,404.19 mi (8,697.21 km) |
| Portland to Arteijo | 5,090.56 mi (8,192.46 km) |
| Portland to Arucas | 5,604.56 mi (9,019.67 km) |
| Portland to Aspe | 5,611.76 mi (9,031.25 km) |
| Portland to Astorga | 5,215.99 mi (8,394.32 km) |
| Portland to Atarfe | 5,575.58 mi (8,973.03 km) |
| Portland to Avila | 5,357.67 mi (8,622.34 km) |
| Portland to Aviles | 5,163.30 mi (8,309.53 km) |
