| Harpenden to Arcos de Valdevez | 786.25 mi (1,265.34 km) |
| Harpenden to Arcozelo | 840.54 mi (1,352.71 km) |
| Harpenden to Arganil | 881.36 mi (1,418.41 km) |
| Harpenden to Arouca | 839.69 mi (1,351.36 km) |
| Harpenden to Arruda dos Vinhos | 980.73 mi (1,578.33 km) |
| Harpenden to Aveiro | 867.28 mi (1,395.76 km) |
| Harpenden to Aver-o-Mar | 821.71 mi (1,322.42 km) |
| Harpenden to Aves | 809.01 mi (1,301.97 km) |
| Harpenden to Azambuja | 971.32 mi (1,563.20 km) |
| Harpenden to Baiao | 820.53 mi (1,320.51 km) |
| Harpenden to Barcelos | 811.25 mi (1,305.59 km) |
| Harpenden to Barreiro | 1,000.98 mi (1,610.92 km) |
| Harpenden to Batalha | 932.73 mi (1,501.08 km) |
| Harpenden to Beja | 1,019.84 mi (1,641.27 km) |
| Harpenden to Belas | 998.22 mi (1,606.48 km) |
