| Silver Spring to Alenquer | 3,558.21 mi (5,726.39 km) |
| Silver Spring to Alfena | 3,524.97 mi (5,672.88 km) |
| Silver Spring to Alijo | 3,574.66 mi (5,752.86 km) |
| Silver Spring to Aljustrel | 3,631.63 mi (5,844.55 km) |
| Silver Spring to Almada | 3,561.22 mi (5,731.23 km) |
| Silver Spring to Almargem | 3,551.08 mi (5,714.91 km) |
| Silver Spring to Almeirim | 3,573.90 mi (5,751.64 km) |
| Silver Spring to Amadora | 3,556.06 mi (5,722.93 km) |
| Silver Spring to Amarante | 3,546.38 mi (5,707.35 km) |
| Silver Spring to Amares | 3,524.66 mi (5,672.39 km) |
| Silver Spring to Amora | 3,564.64 mi (5,736.73 km) |
| Silver Spring to Anadia | 3,550.14 mi (5,713.40 km) |
| Silver Spring to Angra do Heroismo | 2,646.25 mi (4,258.72 km) |
| Silver Spring to Ansiao | 3,563.73 mi (5,735.27 km) |
| Silver Spring to Anta | 3,526.01 mi (5,674.57 km) |
