| Preston to Arcos de Valdevez | 864.07 mi (1,390.58 km) |
| Preston to Arcozelo | 919.83 mi (1,480.32 km) |
| Preston to Arganil | 968.34 mi (1,558.40 km) |
| Preston to Arouca | 922.68 mi (1,484.91 km) |
| Preston to Arruda dos Vinhos | 1,064.02 mi (1,712.37 km) |
| Preston to Aveiro | 948.13 mi (1,525.86 km) |
| Preston to Aver-o-Mar | 898.49 mi (1,445.98 km) |
| Preston to Aves | 889.57 mi (1,431.62 km) |
| Preston to Azambuja | 1,055.81 mi (1,699.17 km) |
| Preston to Baiao | 904.38 mi (1,455.45 km) |
| Preston to Barcelos | 888.83 mi (1,430.43 km) |
| Preston to Barreiro | 1,085.23 mi (1,746.51 km) |
| Preston to Batalha | 1,015.86 mi (1,634.87 km) |
| Preston to Beja | 1,114.02 mi (1,792.85 km) |
| Preston to Belas | 1,080.68 mi (1,739.18 km) |
