| Harpenden to Albolote | 1,020.64 mi (1,642.56 km) |
| Harpenden to Alboraya | 851.06 mi (1,369.64 km) |
| Harpenden to Albox | 1,001.07 mi (1,611.06 km) |
| Harpenden to Alcala de Guadaira | 1,035.94 mi (1,667.19 km) |
| Harpenden to Alcala de Henares | 796.20 mi (1,281.35 km) |
| Harpenden to Alcala la Real | 1,007.73 mi (1,621.79 km) |
| Harpenden to Alcanar | 780.00 mi (1,255.28 km) |
| Harpenden to Alcaniz | 743.96 mi (1,197.28 km) |
| Harpenden to Alcantarilla | 957.52 mi (1,540.98 km) |
| Harpenden to Alcarraz | 709.66 mi (1,142.09 km) |
| Harpenden to Alcaudete | 1,000.21 mi (1,609.69 km) |
| Harpenden to Alcazar de San Juan | 868.42 mi (1,397.58 km) |
| Harpenden to Alcira | 875.25 mi (1,408.58 km) |
| Harpenden to Alcobendas | 795.09 mi (1,279.58 km) |
| Harpenden to Alcora | 811.93 mi (1,306.68 km) |
