| Seia to Arcos de Valdevez | 105.29 mi (169.44 km) |
| Seia to Arcozelo | 65.75 mi (105.81 km) |
| Seia to Arganil | 23.28 mi (37.46 km) |
| Seia to Arouca | 45.37 mi (73.02 km) |
| Seia to Arruda dos Vinhos | 123.04 mi (198.02 km) |
| Seia to Aveiro | 51.86 mi (83.46 km) |
| Seia to Aver-o-Mar | 87.77 mi (141.26 km) |
| Seia to Aves | 76.94 mi (123.83 km) |
| Seia to Azambuja | 112.22 mi (180.61 km) |
| Seia to Baiao | 54.29 mi (87.37 km) |
| Seia to Barcelos | 89.42 mi (143.91 km) |
| Seia to Barreiro | 141.39 mi (227.55 km) |
| Seia to Batalha | 78.84 mi (126.89 km) |
| Seia to Beja | 165.33 mi (266.07 km) |
| Seia to Belas | 141.14 mi (227.15 km) |
