| Middle Island to Oliveira de Frades | 3,304.91 mi (5,318.74 km) |
| Middle Island to Oliveira do Bairro | 3,294.92 mi (5,302.66 km) |
| Middle Island to Oliveira do Hospital | 3,330.05 mi (5,359.19 km) |
| Middle Island to Ourem | 3,315.15 mi (5,335.22 km) |
| Middle Island to Ovar | 3,279.20 mi (5,277.36 km) |
| Middle Island to Pacos de Ferreira | 3,279.97 mi (5,278.61 km) |
| Middle Island to Palmela | 3,329.03 mi (5,357.55 km) |
| Middle Island to Paredes | 3,284.92 mi (5,286.57 km) |
| Middle Island to Paredes de Coura | 3,255.60 mi (5,239.38 km) |
| Middle Island to Penacova | 3,312.04 mi (5,330.21 km) |
| Middle Island to Penafiel | 3,287.14 mi (5,290.14 km) |
| Middle Island to Peniche | 3,284.25 mi (5,285.48 km) |
| Middle Island to Peso da Regua | 3,312.62 mi (5,331.15 km) |
| Middle Island to Pinhal Novo | 3,326.52 mi (5,353.51 km) |
| Middle Island to Pinhel | 3,356.97 mi (5,402.52 km) |
