| Seia to Santarem | 97.28 mi (156.55 km) |
| Seia to Santiago do Cacem | 174.56 mi (280.92 km) |
| Seia to Santo Andre | 173.21 mi (278.75 km) |
| Seia to Santo Tirso | 74.56 mi (119.99 km) |
| Seia to Sao Bras de Alportel | 226.28 mi (364.17 km) |
| Seia to Sao Felix da Marinha | 64.12 mi (103.19 km) |
| Seia to Sao Joao da Madeira | 52.70 mi (84.81 km) |
| Seia to Sao Joao de Ver | 57.69 mi (92.84 km) |
| Seia to Sao Mamede de Infesta | 71.36 mi (114.85 km) |
| Seia to Sao Pedro do Sul | 29.65 mi (47.71 km) |
| Seia to Satao | 21.57 mi (34.71 km) |
| Seia to Senhora da Hora | 72.44 mi (116.58 km) |
| Seia to Serpa | 171.25 mi (275.61 km) |
| Seia to Serta | 47.84 mi (76.99 km) |
| Seia to Sesimbra | 155.70 mi (250.57 km) |
