| Aiken to Arcos de Valdevez | 3,927.78 mi (6,321.15 km) |
| Aiken to Arcozelo | 3,933.50 mi (6,330.36 km) |
| Aiken to Arganil | 3,980.80 mi (6,406.48 km) |
| Aiken to Arouca | 3,955.67 mi (6,366.04 km) |
| Aiken to Arruda dos Vinhos | 3,957.27 mi (6,368.62 km) |
| Aiken to Aveiro | 3,942.00 mi (6,344.03 km) |
| Aiken to Aver-o-Mar | 3,919.76 mi (6,308.24 km) |
| Aiken to Aves | 3,942.15 mi (6,344.27 km) |
| Aiken to Azambuja | 3,965.55 mi (6,381.94 km) |
| Aiken to Baiao | 3,961.14 mi (6,374.84 km) |
| Aiken to Barcelos | 3,924.92 mi (6,316.55 km) |
| Aiken to Barreiro | 3,964.41 mi (6,380.10 km) |
| Aiken to Batalha | 3,955.92 mi (6,366.44 km) |
| Aiken to Beja | 4,039.49 mi (6,500.94 km) |
| Aiken to Belas | 3,951.52 mi (6,359.35 km) |
