| South Portland to Alenquer | 3,121.68 mi (5,023.86 km) |
| South Portland to Alfena | 3,079.75 mi (4,956.37 km) |
| South Portland to Alijo | 3,128.15 mi (5,034.26 km) |
| South Portland to Aljustrel | 3,198.30 mi (5,147.17 km) |
| South Portland to Almada | 3,126.34 mi (5,031.35 km) |
| South Portland to Almargem | 3,115.70 mi (5,014.24 km) |
| South Portland to Almeirim | 3,136.24 mi (5,047.30 km) |
| South Portland to Amadora | 3,121.08 mi (5,022.89 km) |
| South Portland to Amarante | 3,100.55 mi (4,989.86 km) |
| South Portland to Amares | 3,077.93 mi (4,953.45 km) |
| South Portland to Amora | 3,129.91 mi (5,037.11 km) |
| South Portland to Anadia | 3,107.67 mi (5,001.31 km) |
| South Portland to Angra do Heroismo | 2,241.87 mi (3,607.95 km) |
| South Portland to Ansiao | 3,123.14 mi (5,026.21 km) |
| South Portland to Anta | 3,081.72 mi (4,959.55 km) |
