| Keystone to Alenquer | 4,188.45 mi (6,740.67 km) |
| Keystone to Alfena | 4,178.61 mi (6,724.83 km) |
| Keystone to Alijo | 4,231.12 mi (6,809.32 km) |
| Keystone to Aljustrel | 4,252.47 mi (6,843.69 km) |
| Keystone to Almada | 4,187.22 mi (6,738.68 km) |
| Keystone to Almargem | 4,178.52 mi (6,724.68 km) |
| Keystone to Almeirim | 4,206.76 mi (6,770.13 km) |
| Keystone to Amadora | 4,182.41 mi (6,730.94 km) |
| Keystone to Amarante | 4,201.37 mi (6,761.45 km) |
| Keystone to Amares | 4,182.47 mi (6,731.03 km) |
| Keystone to Amora | 4,190.18 mi (6,743.45 km) |
| Keystone to Anadia | 4,195.99 mi (6,752.80 km) |
| Keystone to Angra do Heroismo | 3,227.20 mi (5,193.68 km) |
| Keystone to Ansiao | 4,204.38 mi (6,766.29 km) |
| Keystone to Anta | 4,177.14 mi (6,722.46 km) |
