| Seia to Oliveira de Frades | 32.43 mi (52.19 km) |
| Seia to Oliveira do Bairro | 42.43 mi (68.29 km) |
| Seia to Oliveira do Hospital | 9.49 mi (15.27 km) |
| Seia to Ourem | 70.25 mi (113.06 km) |
| Seia to Ovar | 57.67 mi (92.81 km) |
| Seia to Pacos de Ferreira | 68.82 mi (110.75 km) |
| Seia to Palmela | 143.21 mi (230.47 km) |
| Seia to Paredes | 63.07 mi (101.50 km) |
| Seia to Paredes de Coura | 112.29 mi (180.71 km) |
| Seia to Penacova | 32.33 mi (52.03 km) |
| Seia to Penafiel | 62.12 mi (99.98 km) |
| Seia to Peniche | 115.20 mi (185.39 km) |
| Seia to Peso da Regua | 51.50 mi (82.89 km) |
| Seia to Pinhal Novo | 139.58 mi (224.63 km) |
| Seia to Pinhel | 41.66 mi (67.04 km) |
