| Castleton to Oliveira de Frades | 932.42 mi (1,500.58 km) |
| Castleton to Oliveira do Bairro | 950.22 mi (1,529.23 km) |
| Castleton to Oliveira do Hospital | 951.99 mi (1,532.08 km) |
| Castleton to Ourem | 1,008.85 mi (1,623.58 km) |
| Castleton to Ovar | 928.97 mi (1,495.04 km) |
| Castleton to Pacos de Ferreira | 899.01 mi (1,446.82 km) |
| Castleton to Palmela | 1,085.77 mi (1,747.38 km) |
| Castleton to Paredes | 902.45 mi (1,452.35 km) |
| Castleton to Paredes de Coura | 858.87 mi (1,382.21 km) |
| Castleton to Penacova | 963.53 mi (1,550.66 km) |
| Castleton to Penafiel | 901.33 mi (1,450.55 km) |
| Castleton to Peniche | 1,040.48 mi (1,674.49 km) |
| Castleton to Peso da Regua | 896.94 mi (1,443.48 km) |
| Castleton to Pinhal Novo | 1,081.67 mi (1,740.78 km) |
| Castleton to Pinhel | 913.69 mi (1,470.45 km) |
