| Alpena to Oliveira de Frades | 3,680.48 mi (5,923.16 km) |
| Alpena to Oliveira do Bairro | 3,673.56 mi (5,912.02 km) |
| Alpena to Oliveira do Hospital | 3,707.81 mi (5,967.14 km) |
| Alpena to Ourem | 3,702.15 mi (5,958.03 km) |
| Alpena to Ovar | 3,654.99 mi (5,882.14 km) |
| Alpena to Pacos de Ferreira | 3,651.06 mi (5,875.82 km) |
| Alpena to Palmela | 3,727.14 mi (5,998.25 km) |
| Alpena to Paredes | 3,656.41 mi (5,884.43 km) |
| Alpena to Paredes de Coura | 3,620.96 mi (5,827.37 km) |
| Alpena to Penacova | 3,692.19 mi (5,942.01 km) |
| Alpena to Penafiel | 3,658.39 mi (5,887.61 km) |
| Alpena to Peniche | 3,677.00 mi (5,917.56 km) |
| Alpena to Peso da Regua | 3,682.40 mi (5,926.25 km) |
| Alpena to Pinhal Novo | 3,724.10 mi (5,993.37 km) |
| Alpena to Pinhel | 3,727.77 mi (5,999.26 km) |
