| Twickenham to Arcos de Valdevez | 765.13 mi (1,231.36 km) |
| Twickenham to Arcozelo | 819.18 mi (1,318.34 km) |
| Twickenham to Arganil | 859.19 mi (1,382.73 km) |
| Twickenham to Arouca | 817.97 mi (1,316.40 km) |
| Twickenham to Arruda dos Vinhos | 958.80 mi (1,543.04 km) |
| Twickenham to Aveiro | 845.73 mi (1,361.07 km) |
| Twickenham to Aver-o-Mar | 800.64 mi (1,288.51 km) |
| Twickenham to Aves | 787.57 mi (1,267.48 km) |
| Twickenham to Azambuja | 949.29 mi (1,527.74 km) |
| Twickenham to Baiao | 798.75 mi (1,285.46 km) |
| Twickenham to Barcelos | 790.12 mi (1,271.57 km) |
| Twickenham to Barreiro | 978.94 mi (1,575.45 km) |
| Twickenham to Batalha | 910.87 mi (1,465.90 km) |
| Twickenham to Beja | 996.89 mi (1,604.34 km) |
| Twickenham to Belas | 976.35 mi (1,571.29 km) |
