| Harpenden to Alhendin | 1,028.38 mi (1,655.02 km) |
| Harpenden to Alicante | 930.86 mi (1,498.07 km) |
| Harpenden to Aljaraque | 1,056.47 mi (1,700.22 km) |
| Harpenden to Almagro | 907.87 mi (1,461.08 km) |
| Harpenden to Almansa | 895.43 mi (1,441.05 km) |
| Harpenden to Almazora | 820.75 mi (1,320.87 km) |
| Harpenden to Almendralejo | 953.39 mi (1,534.33 km) |
| Harpenden to Almeria | 1,039.98 mi (1,673.68 km) |
| Harpenden to Almonte | 1,049.25 mi (1,688.60 km) |
| Harpenden to Almoradi | 947.35 mi (1,524.62 km) |
| Harpenden to Almunecar | 1,054.89 mi (1,697.68 km) |
| Harpenden to Almusafes | 865.55 mi (1,392.97 km) |
| Harpenden to Alovera | 787.38 mi (1,267.17 km) |
| Harpenden to Alpedrete | 790.56 mi (1,272.28 km) |
| Harpenden to Altea | 913.45 mi (1,470.06 km) |
