| Ostrow Mazowiecka to Oliveira do Bairro | 1,654.64 mi (2,662.88 km) |
| Ostrow Mazowiecka to Oliveira do Hospital | 1,636.69 mi (2,633.99 km) |
| Ostrow Mazowiecka to Ourem | 1,697.17 mi (2,731.33 km) |
| Ostrow Mazowiecka to Ovar | 1,644.14 mi (2,645.99 km) |
| Ostrow Mazowiecka to Pacos de Ferreira | 1,617.03 mi (2,602.37 km) |
| Ostrow Mazowiecka to Palmela | 1,761.47 mi (2,834.82 km) |
| Ostrow Mazowiecka to Paredes | 1,617.33 mi (2,602.85 km) |
| Ostrow Mazowiecka to Paredes de Coura | 1,595.31 mi (2,567.40 km) |
| Ostrow Mazowiecka to Penacova | 1,657.31 mi (2,667.18 km) |
| Ostrow Mazowiecka to Penafiel | 1,615.10 mi (2,599.26 km) |
| Ostrow Mazowiecka to Peniche | 1,742.61 mi (2,804.47 km) |
| Ostrow Mazowiecka to Peso da Regua | 1,596.74 mi (2,569.70 km) |
| Ostrow Mazowiecka to Pinhal Novo | 1,758.93 mi (2,830.73 km) |
| Ostrow Mazowiecka to Pinhel | 1,585.97 mi (2,552.38 km) |
| Ostrow Mazowiecka to Pombal | 1,687.22 mi (2,715.32 km) |
