| Olton to Oliveira de Frades | 863.79 mi (1,390.14 km) |
| Olton to Oliveira do Bairro | 882.17 mi (1,419.71 km) |
| Olton to Oliveira do Hospital | 882.28 mi (1,419.89 km) |
| Olton to Ourem | 940.14 mi (1,513.01 km) |
| Olton to Ovar | 861.62 mi (1,386.65 km) |
| Olton to Pacos de Ferreira | 831.51 mi (1,338.18 km) |
| Olton to Palmela | 1,016.90 mi (1,636.54 km) |
| Olton to Paredes | 834.70 mi (1,343.32 km) |
| Olton to Paredes de Coura | 792.58 mi (1,275.54 km) |
| Olton to Penacova | 894.73 mi (1,439.93 km) |
| Olton to Penafiel | 833.46 mi (1,341.33 km) |
| Olton to Peniche | 973.34 mi (1,566.44 km) |
| Olton to Peso da Regua | 827.75 mi (1,332.14 km) |
| Olton to Pinhal Novo | 1,012.88 mi (1,630.08 km) |
| Olton to Pinhel | 842.50 mi (1,355.87 km) |
