| Biga to Oliveira de Frades | 1,849.52 mi (2,976.52 km) |
| Biga to Oliveira do Bairro | 1,868.46 mi (3,006.99 km) |
| Biga to Oliveira do Hospital | 1,837.70 mi (2,957.50 km) |
| Biga to Ourem | 1,884.41 mi (3,032.66 km) |
| Biga to Ovar | 1,870.74 mi (3,010.67 km) |
| Biga to Pacos de Ferreira | 1,853.91 mi (2,983.58 km) |
| Biga to Palmela | 1,919.79 mi (3,089.60 km) |
| Biga to Paredes | 1,851.28 mi (2,979.34 km) |
| Biga to Paredes de Coura | 1,855.11 mi (2,985.51 km) |
| Biga to Penacova | 1,860.64 mi (2,994.42 km) |
| Biga to Penafiel | 1,848.68 mi (2,975.16 km) |
| Biga to Peniche | 1,930.68 mi (3,107.13 km) |
| Biga to Peso da Regua | 1,823.14 mi (2,934.06 km) |
| Biga to Pinhal Novo | 1,919.37 mi (3,088.93 km) |
| Biga to Pinhel | 1,791.21 mi (2,882.68 km) |
