| Seini to Oliveira de Frades | 1,619.07 mi (2,605.63 km) |
| Seini to Oliveira do Bairro | 1,640.23 mi (2,639.70 km) |
| Seini to Oliveira do Hospital | 1,616.02 mi (2,600.73 km) |
| Seini to Ourem | 1,672.56 mi (2,691.72 km) |
| Seini to Ovar | 1,635.04 mi (2,631.34 km) |
| Seini to Pacos de Ferreira | 1,611.57 mi (2,593.58 km) |
| Seini to Palmela | 1,726.48 mi (2,778.49 km) |
| Seini to Paredes | 1,610.57 mi (2,591.96 km) |
| Seini to Paredes de Coura | 1,599.39 mi (2,573.97 km) |
| Seini to Penacova | 1,638.38 mi (2,636.72 km) |
| Seini to Penafiel | 1,608.10 mi (2,587.99 km) |
| Seini to Peniche | 1,719.84 mi (2,767.82 km) |
| Seini to Peso da Regua | 1,585.88 mi (2,552.23 km) |
| Seini to Pinhal Novo | 1,724.77 mi (2,775.74 km) |
| Seini to Pinhel | 1,565.33 mi (2,519.15 km) |
