| Harpenden to Oliveira de Frades | 852.17 mi (1,371.43 km) |
| Harpenden to Oliveira do Bairro | 871.45 mi (1,402.47 km) |
| Harpenden to Oliveira do Hospital | 868.56 mi (1,397.81 km) |
| Harpenden to Ourem | 927.96 mi (1,493.40 km) |
| Harpenden to Ovar | 852.24 mi (1,371.55 km) |
| Harpenden to Pacos de Ferreira | 822.05 mi (1,322.97 km) |
| Harpenden to Palmela | 1,004.07 mi (1,615.89 km) |
| Harpenden to Paredes | 824.79 mi (1,327.38 km) |
| Harpenden to Paredes de Coura | 785.47 mi (1,264.09 km) |
| Harpenden to Penacova | 882.60 mi (1,420.40 km) |
| Harpenden to Penafiel | 823.36 mi (1,325.06 km) |
| Harpenden to Peniche | 963.72 mi (1,550.95 km) |
| Harpenden to Peso da Regua | 815.32 mi (1,312.14 km) |
| Harpenden to Pinhal Novo | 1,000.21 mi (1,609.68 km) |
| Harpenden to Pinhel | 826.16 mi (1,329.57 km) |
