| Seia to Cascais | 149.97 mi (241.36 km) |
| Seia to Castelo Branco | 43.17 mi (69.47 km) |
| Seia to Castro Daire | 35.17 mi (56.61 km) |
| Seia to Celorico de Basto | 68.21 mi (109.78 km) |
| Seia to Chamusca | 84.85 mi (136.56 km) |
| Seia to Chaves | 91.90 mi (147.89 km) |
| Seia to Cinfaes | 51.99 mi (83.67 km) |
| Seia to Coimbra | 40.97 mi (65.93 km) |
| Seia to Condeixa-a-Nova | 47.04 mi (75.71 km) |
| Seia to Corroios | 146.80 mi (236.26 km) |
| Seia to Coruche | 110.31 mi (177.53 km) |
| Seia to Costa de Caparica | 147.50 mi (237.37 km) |
| Seia to Covilha | 14.33 mi (23.07 km) |
| Seia to Eiras | 39.99 mi (64.35 km) |
| Seia to Elvas | 111.41 mi (179.29 km) |
