| Boulder to Alenquer | 4,842.64 mi (7,793.48 km) |
| Boulder to Alfena | 4,775.43 mi (7,685.30 km) |
| Boulder to Alijo | 4,818.16 mi (7,754.07 km) |
| Boulder to Aljustrel | 4,926.05 mi (7,927.70 km) |
| Boulder to Almada | 4,851.48 mi (7,807.70 km) |
| Boulder to Almargem | 4,839.76 mi (7,788.85 km) |
| Boulder to Almeirim | 4,853.89 mi (7,811.58 km) |
| Boulder to Amadora | 4,846.05 mi (7,798.97 km) |
| Boulder to Amarante | 4,793.64 mi (7,714.62 km) |
| Boulder to Amares | 4,768.33 mi (7,673.89 km) |
| Boulder to Amora | 4,855.38 mi (7,813.98 km) |
| Boulder to Anadia | 4,811.75 mi (7,743.76 km) |
| Boulder to Angra do Heroismo | 4,027.22 mi (6,481.18 km) |
| Boulder to Ansiao | 4,832.67 mi (7,777.43 km) |
| Boulder to Anta | 4,780.47 mi (7,693.42 km) |
