| Billdal to Arcos de Valdevez | 1,405.98 mi (2,262.70 km) |
| Billdal to Arcozelo | 1,458.43 mi (2,347.12 km) |
| Billdal to Arganil | 1,492.53 mi (2,401.99 km) |
| Billdal to Arouca | 1,454.95 mi (2,341.51 km) |
| Billdal to Arruda dos Vinhos | 1,593.33 mi (2,564.22 km) |
| Billdal to Aveiro | 1,483.65 mi (2,387.71 km) |
| Billdal to Aver-o-Mar | 1,441.54 mi (2,319.93 km) |
| Billdal to Aves | 1,426.57 mi (2,295.83 km) |
| Billdal to Azambuja | 1,583.05 mi (2,547.68 km) |
| Billdal to Baiao | 1,435.47 mi (2,310.17 km) |
| Billdal to Barcelos | 1,430.74 mi (2,302.55 km) |
| Billdal to Barreiro | 1,612.43 mi (2,594.96 km) |
| Billdal to Batalha | 1,546.24 mi (2,488.44 km) |
| Billdal to Beja | 1,620.85 mi (2,608.51 km) |
| Billdal to Belas | 1,611.26 mi (2,593.07 km) |
