| Biga to Arcos de Valdevez | 1,848.48 mi (2,974.83 km) |
| Biga to Arcozelo | 1,868.71 mi (3,007.39 km) |
| Biga to Arganil | 1,849.53 mi (2,976.53 km) |
| Biga to Arouca | 1,849.96 mi (2,977.22 km) |
| Biga to Arruda dos Vinhos | 1,921.20 mi (3,091.88 km) |
| Biga to Aveiro | 1,874.63 mi (3,016.92 km) |
| Biga to Aver-o-Mar | 1,871.19 mi (3,011.39 km) |
| Biga to Aves | 1,846.81 mi (2,972.16 km) |
| Biga to Azambuja | 1,909.38 mi (3,072.86 km) |
| Biga to Baiao | 1,836.29 mi (2,955.23 km) |
| Biga to Barcelos | 1,862.13 mi (2,996.81 km) |
| Biga to Barreiro | 1,926.70 mi (3,100.73 km) |
| Biga to Batalha | 1,896.50 mi (3,052.13 km) |
| Biga to Beja | 1,876.40 mi (3,019.77 km) |
| Biga to Belas | 1,935.47 mi (3,114.83 km) |
