| Riverdale to Oliveira de Frades | 4,095.09 mi (6,590.42 km) |
| Riverdale to Oliveira do Bairro | 4,084.10 mi (6,572.73 km) |
| Riverdale to Oliveira do Hospital | 4,119.34 mi (6,629.43 km) |
| Riverdale to Ourem | 4,101.14 mi (6,600.15 km) |
| Riverdale to Ovar | 4,069.44 mi (6,549.14 km) |
| Riverdale to Pacos de Ferreira | 4,071.77 mi (6,552.87 km) |
| Riverdale to Palmela | 4,110.38 mi (6,615.01 km) |
| Riverdale to Paredes | 4,076.56 mi (6,560.59 km) |
| Riverdale to Paredes de Coura | 4,049.28 mi (6,516.68 km) |
| Riverdale to Penacova | 4,100.59 mi (6,599.25 km) |
| Riverdale to Penafiel | 4,078.84 mi (6,564.26 km) |
| Riverdale to Peniche | 4,068.15 mi (6,547.05 km) |
| Riverdale to Peso da Regua | 4,104.66 mi (6,605.81 km) |
| Riverdale to Pinhal Novo | 4,108.11 mi (6,611.37 km) |
| Riverdale to Pinhel | 4,148.46 mi (6,676.30 km) |
