| Rock Island to Oliveira de Frades | 4,113.06 mi (6,619.33 km) |
| Rock Island to Oliveira do Bairro | 4,105.75 mi (6,607.57 km) |
| Rock Island to Oliveira do Hospital | 4,140.15 mi (6,662.93 km) |
| Rock Island to Ourem | 4,133.25 mi (6,651.83 km) |
| Rock Island to Ovar | 4,087.51 mi (6,578.21 km) |
| Rock Island to Pacos de Ferreira | 4,084.13 mi (6,572.77 km) |
| Rock Island to Palmela | 4,156.57 mi (6,689.36 km) |
| Rock Island to Paredes | 4,089.44 mi (6,581.32 km) |
| Rock Island to Paredes de Coura | 4,054.61 mi (6,525.26 km) |
| Rock Island to Penacova | 4,124.22 mi (6,637.28 km) |
| Rock Island to Penafiel | 4,091.45 mi (6,584.55 km) |
| Rock Island to Peniche | 4,107.22 mi (6,609.93 km) |
| Rock Island to Peso da Regua | 4,115.65 mi (6,623.50 km) |
| Rock Island to Pinhal Novo | 4,153.62 mi (6,684.61 km) |
| Rock Island to Pinhel | 4,160.96 mi (6,696.42 km) |
