| Letchworth to Arcos de Valdevez | 798.42 mi (1,284.93 km) |
| Letchworth to Arcozelo | 852.73 mi (1,372.33 km) |
| Letchworth to Arganil | 893.60 mi (1,438.11 km) |
| Letchworth to Arouca | 851.92 mi (1,371.03 km) |
| Letchworth to Arruda dos Vinhos | 992.96 mi (1,598.02 km) |
| Letchworth to Aveiro | 879.49 mi (1,415.41 km) |
| Letchworth to Aver-o-Mar | 833.88 mi (1,342.00 km) |
| Letchworth to Aves | 821.21 mi (1,321.61 km) |
| Letchworth to Azambuja | 983.56 mi (1,582.89 km) |
| Letchworth to Baiao | 832.75 mi (1,340.18 km) |
| Letchworth to Barcelos | 823.42 mi (1,325.17 km) |
| Letchworth to Barreiro | 1,013.22 mi (1,630.62 km) |
| Letchworth to Batalha | 944.96 mi (1,520.76 km) |
| Letchworth to Beja | 1,032.09 mi (1,660.99 km) |
| Letchworth to Belas | 1,010.45 mi (1,626.16 km) |
