| Williamstown to Arcos de Valdevez | 3,395.99 mi (5,465.31 km) |
| Williamstown to Arcozelo | 3,405.20 mi (5,480.14 km) |
| Williamstown to Arganil | 3,455.36 mi (5,560.87 km) |
| Williamstown to Arouca | 3,427.43 mi (5,515.92 km) |
| Williamstown to Arruda dos Vinhos | 3,438.64 mi (5,533.96 km) |
| Williamstown to Aveiro | 3,415.50 mi (5,496.71 km) |
| Williamstown to Aver-o-Mar | 3,390.15 mi (5,455.92 km) |
| Williamstown to Aves | 3,411.88 mi (5,490.89 km) |
| Williamstown to Azambuja | 3,446.27 mi (5,546.23 km) |
| Williamstown to Baiao | 3,431.70 mi (5,522.78 km) |
| Williamstown to Barcelos | 3,394.68 mi (5,463.21 km) |
| Williamstown to Barreiro | 3,447.25 mi (5,547.81 km) |
| Williamstown to Batalha | 3,433.91 mi (5,526.34 km) |
| Williamstown to Beja | 3,523.56 mi (5,670.63 km) |
| Williamstown to Belas | 3,434.14 mi (5,526.71 km) |
