| Letchworth to Oliveira de Frades | 864.40 mi (1,391.11 km) |
| Letchworth to Oliveira do Bairro | 883.67 mi (1,422.13 km) |
| Letchworth to Oliveira do Hospital | 880.81 mi (1,417.52 km) |
| Letchworth to Ourem | 940.19 mi (1,513.09 km) |
| Letchworth to Ovar | 864.44 mi (1,391.18 km) |
| Letchworth to Pacos de Ferreira | 834.25 mi (1,342.60 km) |
| Letchworth to Palmela | 1,016.31 mi (1,635.59 km) |
| Letchworth to Paredes | 837.00 mi (1,347.02 km) |
| Letchworth to Paredes de Coura | 797.62 mi (1,283.65 km) |
| Letchworth to Penacova | 894.83 mi (1,440.10 km) |
| Letchworth to Penafiel | 835.57 mi (1,344.71 km) |
| Letchworth to Peniche | 975.93 mi (1,570.60 km) |
| Letchworth to Peso da Regua | 827.56 mi (1,331.83 km) |
| Letchworth to Pinhal Novo | 1,012.45 mi (1,629.39 km) |
| Letchworth to Pinhel | 838.41 mi (1,349.30 km) |
