| Upper Grand Lagoon to Oliveira de Frades | 4,285.85 mi (6,897.40 km) |
| Upper Grand Lagoon to Oliveira do Bairro | 4,274.02 mi (6,878.36 km) |
| Upper Grand Lagoon to Oliveira do Hospital | 4,309.27 mi (6,935.09 km) |
| Upper Grand Lagoon to Ourem | 4,288.37 mi (6,901.47 km) |
| Upper Grand Lagoon to Ovar | 4,260.31 mi (6,856.31 km) |
| Upper Grand Lagoon to Pacos de Ferreira | 4,264.00 mi (6,862.24 km) |
| Upper Grand Lagoon to Palmela | 4,293.98 mi (6,910.50 km) |
| Upper Grand Lagoon to Paredes | 4,268.64 mi (6,869.71 km) |
| Upper Grand Lagoon to Paredes de Coura | 4,243.30 mi (6,828.94 km) |
| Upper Grand Lagoon to Penacova | 4,289.92 mi (6,903.96 km) |
| Upper Grand Lagoon to Penafiel | 4,270.98 mi (6,873.47 km) |
| Upper Grand Lagoon to Peniche | 4,253.81 mi (6,845.84 km) |
| Upper Grand Lagoon to Peso da Regua | 4,297.05 mi (6,915.43 km) |
| Upper Grand Lagoon to Pinhal Novo | 4,291.91 mi (6,907.16 km) |
| Upper Grand Lagoon to Pinhel | 4,340.26 mi (6,984.97 km) |
