| Birstonas to Oliveira do Bairro | 1,777.46 mi (2,860.55 km) |
| Birstonas to Oliveira do Hospital | 1,761.15 mi (2,834.30 km) |
| Birstonas to Ourem | 1,822.14 mi (2,932.46 km) |
| Birstonas to Ovar | 1,765.74 mi (2,841.68 km) |
| Birstonas to Pacos de Ferreira | 1,737.94 mi (2,796.94 km) |
| Birstonas to Palmela | 1,888.44 mi (3,039.15 km) |
| Birstonas to Paredes | 1,738.56 mi (2,797.94 km) |
| Birstonas to Paredes de Coura | 1,713.95 mi (2,758.34 km) |
| Birstonas to Penacova | 1,781.21 mi (2,866.58 km) |
| Birstonas to Penafiel | 1,736.41 mi (2,794.48 km) |
| Birstonas to Peniche | 1,866.85 mi (3,004.40 km) |
| Birstonas to Peso da Regua | 1,719.14 mi (2,766.69 km) |
| Birstonas to Pinhal Novo | 1,885.72 mi (3,034.78 km) |
| Birstonas to Pinhel | 1,710.82 mi (2,753.29 km) |
| Birstonas to Pombal | 1,811.40 mi (2,915.17 km) |
