| Duncan to Argentona | 5,153.99 mi (8,294.54 km) |
| Duncan to Arico el Nuevo | 4,691.90 mi (7,550.88 km) |
| Duncan to Armilla | 5,040.69 mi (8,112.20 km) |
| Duncan to Arnedo | 4,932.65 mi (7,938.34 km) |
| Duncan to Arona | 4,685.08 mi (7,539.90 km) |
| Duncan to Arrecife | 4,822.91 mi (7,761.72 km) |
| Duncan to Arrigorriaga | 4,864.00 mi (7,827.85 km) |
| Duncan to Arroyomolinos | 4,918.91 mi (7,916.21 km) |
| Duncan to Arteijo | 4,610.63 mi (7,420.09 km) |
| Duncan to Arucas | 4,746.39 mi (7,638.57 km) |
| Duncan to Aspe | 5,130.65 mi (8,256.98 km) |
| Duncan to Astorga | 4,747.57 mi (7,640.47 km) |
| Duncan to Atarfe | 5,034.65 mi (8,102.48 km) |
| Duncan to Avila | 4,870.02 mi (7,837.55 km) |
| Duncan to Aviles | 4,719.17 mi (7,594.77 km) |
