| Ostrov to Oliveira do Bairro | 1,233.56 mi (1,985.23 km) |
| Ostrov to Oliveira do Hospital | 1,215.35 mi (1,955.92 km) |
| Ostrov to Ourem | 1,275.79 mi (2,053.19 km) |
| Ostrov to Ovar | 1,223.39 mi (1,968.86 km) |
| Ostrov to Pacos de Ferreira | 1,196.54 mi (1,925.65 km) |
| Ostrov to Palmela | 1,340.16 mi (2,156.78 km) |
| Ostrov to Paredes | 1,196.73 mi (1,925.94 km) |
| Ostrov to Paredes de Coura | 1,175.82 mi (1,892.30 km) |
| Ostrov to Penacova | 1,236.04 mi (1,989.21 km) |
| Ostrov to Penafiel | 1,194.47 mi (1,922.32 km) |
| Ostrov to Peniche | 1,321.29 mi (2,126.41 km) |
| Ostrov to Peso da Regua | 1,175.79 mi (1,892.26 km) |
| Ostrov to Pinhal Novo | 1,337.60 mi (2,152.66 km) |
| Ostrov to Pinhel | 1,164.61 mi (1,874.27 km) |
| Ostrov to Pombal | 1,265.91 mi (2,037.29 km) |
