| Huntsville to Arcos de Valdevez | 4,123.70 mi (6,636.46 km) |
| Huntsville to Arcozelo | 4,132.97 mi (6,651.37 km) |
| Huntsville to Arganil | 4,183.02 mi (6,731.92 km) |
| Huntsville to Arouca | 4,155.20 mi (6,687.14 km) |
| Huntsville to Arruda dos Vinhos | 4,165.56 mi (6,703.82 km) |
| Huntsville to Aveiro | 4,143.21 mi (6,667.85 km) |
| Huntsville to Aver-o-Mar | 4,117.92 mi (6,627.16 km) |
| Huntsville to Aves | 4,139.64 mi (6,662.11 km) |
| Huntsville to Azambuja | 4,173.28 mi (6,716.25 km) |
| Huntsville to Baiao | 4,159.47 mi (6,694.02 km) |
| Huntsville to Barcelos | 4,122.45 mi (6,634.44 km) |
| Huntsville to Barreiro | 4,173.93 mi (6,717.30 km) |
| Huntsville to Batalha | 4,161.27 mi (6,696.92 km) |
| Huntsville to Beja | 4,250.06 mi (6,839.81 km) |
| Huntsville to Belas | 4,160.85 mi (6,696.25 km) |
