| Harpenden to Alcorcon | 809.45 mi (1,302.69 km) |
| Harpenden to Alcoy | 906.47 mi (1,458.82 km) |
| Harpenden to Alcudia | 843.17 mi (1,356.95 km) |
| Harpenden to Aldaya | 853.57 mi (1,373.68 km) |
| Harpenden to Alella | 724.04 mi (1,165.23 km) |
| Harpenden to Alfafar | 856.43 mi (1,378.30 km) |
| Harpenden to Alfaro | 669.21 mi (1,077.00 km) |
| Harpenden to Algeciras | 1,112.66 mi (1,790.65 km) |
| Harpenden to Algemesi | 872.51 mi (1,404.16 km) |
| Harpenden to Algete | 789.49 mi (1,270.55 km) |
| Harpenden to Alginet | 867.48 mi (1,396.08 km) |
| Harpenden to Alguazas | 952.12 mi (1,532.29 km) |
| Harpenden to Alhama de Murcia | 966.37 mi (1,555.22 km) |
| Harpenden to Alhaurin de la Torre | 1,066.78 mi (1,716.82 km) |
| Harpenden to Alhaurin el Grande | 1,070.34 mi (1,722.54 km) |
