| Alton to Arcos de Valdevez | 732.88 mi (1,179.46 km) |
| Alton to Arcozelo | 787.15 mi (1,266.80 km) |
| Alton to Arganil | 828.04 mi (1,332.60 km) |
| Alton to Arouca | 786.31 mi (1,265.45 km) |
| Alton to Arruda dos Vinhos | 927.37 mi (1,492.45 km) |
| Alton to Aveiro | 813.90 mi (1,309.84 km) |
| Alton to Aver-o-Mar | 768.35 mi (1,236.54 km) |
| Alton to Aves | 755.62 mi (1,216.05 km) |
| Alton to Azambuja | 917.98 mi (1,477.34 km) |
| Alton to Baiao | 767.15 mi (1,234.61 km) |
| Alton to Barcelos | 757.88 mi (1,219.70 km) |
| Alton to Barreiro | 947.64 mi (1,525.07 km) |
| Alton to Batalha | 879.36 mi (1,415.19 km) |
| Alton to Beja | 966.82 mi (1,555.94 km) |
| Alton to Belas | 944.85 mi (1,520.59 km) |
