| Boston to Arcos de Valdevez | 861.88 mi (1,387.06 km) |
| Boston to Arcozelo | 916.59 mi (1,475.11 km) |
| Boston to Arganil | 958.89 mi (1,543.19 km) |
| Boston to Arouca | 916.44 mi (1,474.87 km) |
| Boston to Arruda dos Vinhos | 1,057.78 mi (1,702.33 km) |
| Boston to Aveiro | 943.69 mi (1,518.72 km) |
| Boston to Aver-o-Mar | 897.23 mi (1,443.95 km) |
| Boston to Aves | 885.24 mi (1,424.65 km) |
| Boston to Azambuja | 1,048.57 mi (1,687.51 km) |
| Boston to Baiao | 897.39 mi (1,444.22 km) |
| Boston to Barcelos | 886.90 mi (1,427.33 km) |
| Boston to Barreiro | 1,078.23 mi (1,735.24 km) |
| Boston to Batalha | 1,009.68 mi (1,624.92 km) |
| Boston to Beja | 1,098.67 mi (1,768.15 km) |
| Boston to Belas | 1,075.15 mi (1,730.28 km) |
