| Duncan to Alenquer | 4,720.42 mi (7,596.77 km) |
| Duncan to Alfena | 4,674.08 mi (7,522.20 km) |
| Duncan to Alijo | 4,721.34 mi (7,598.26 km) |
| Duncan to Aljustrel | 4,797.76 mi (7,721.25 km) |
| Duncan to Almada | 4,725.51 mi (7,604.97 km) |
| Duncan to Almargem | 4,714.76 mi (7,587.67 km) |
| Duncan to Almeirim | 4,734.59 mi (7,619.59 km) |
| Duncan to Amadora | 4,720.23 mi (7,596.47 km) |
| Duncan to Amarante | 4,694.37 mi (7,554.86 km) |
| Duncan to Amares | 4,671.05 mi (7,517.32 km) |
| Duncan to Amora | 4,729.12 mi (7,610.78 km) |
| Duncan to Anadia | 4,703.79 mi (7,570.02 km) |
| Duncan to Angra do Heroismo | 3,833.24 mi (6,169.00 km) |
| Duncan to Ansiao | 4,720.26 mi (7,596.53 km) |
| Duncan to Anta | 4,676.71 mi (7,526.44 km) |
