| Biga to Alenquer | 1,917.47 mi (3,085.87 km) |
| Biga to Alfena | 1,860.66 mi (2,994.44 km) |
| Biga to Alijo | 1,806.43 mi (2,907.16 km) |
| Biga to Aljustrel | 1,893.45 mi (3,047.21 km) |
| Biga to Almada | 1,931.24 mi (3,108.03 km) |
| Biga to Almargem | 1,934.20 mi (3,112.79 km) |
| Biga to Almeirim | 1,894.17 mi (3,048.36 km) |
| Biga to Amadora | 1,934.21 mi (3,112.81 km) |
| Biga to Amarante | 1,836.84 mi (2,956.12 km) |
| Biga to Amares | 1,846.57 mi (2,971.76 km) |
| Biga to Amora | 1,930.14 mi (3,106.26 km) |
| Biga to Anadia | 1,866.15 mi (3,003.27 km) |
| Biga to Angra do Heroismo | 2,861.16 mi (4,604.60 km) |
| Biga to Ansiao | 1,873.47 mi (3,015.06 km) |
| Biga to Anta | 1,868.56 mi (3,007.15 km) |
