| Twickenham to Oliveira de Frades | 830.30 mi (1,336.24 km) |
| Twickenham to Oliveira do Bairro | 849.73 mi (1,367.51 km) |
| Twickenham to Oliveira do Hospital | 846.31 mi (1,362.00 km) |
| Twickenham to Ourem | 905.93 mi (1,457.96 km) |
| Twickenham to Ovar | 830.78 mi (1,337.02 km) |
| Twickenham to Pacos de Ferreira | 800.61 mi (1,288.46 km) |
| Twickenham to Palmela | 981.88 mi (1,580.19 km) |
| Twickenham to Paredes | 803.27 mi (1,292.73 km) |
| Twickenham to Paredes de Coura | 764.51 mi (1,230.37 km) |
| Twickenham to Penacova | 860.62 mi (1,385.03 km) |
| Twickenham to Penafiel | 801.79 mi (1,290.36 km) |
| Twickenham to Peniche | 942.13 mi (1,516.22 km) |
| Twickenham to Peso da Regua | 793.34 mi (1,276.76 km) |
| Twickenham to Pinhal Novo | 978.06 mi (1,574.03 km) |
| Twickenham to Pinhel | 803.50 mi (1,293.11 km) |
