| Harpenden to Ames | 726.86 mi (1,169.77 km) |
| Harpenden to Amorebieta | 604.30 mi (972.53 km) |
| Harpenden to Amposta | 768.69 mi (1,237.08 km) |
| Harpenden to Amurrio | 618.00 mi (994.57 km) |
| Harpenden to Andoain | 599.27 mi (964.43 km) |
| Harpenden to Andraitx | 856.26 mi (1,378.01 km) |
| Harpenden to Andujar | 968.70 mi (1,558.97 km) |
| Harpenden to Antequera | 1,042.94 mi (1,678.45 km) |
| Harpenden to Antigua | 1,763.89 mi (2,838.70 km) |
| Harpenden to Aranda de Duero | 717.54 mi (1,154.77 km) |
| Harpenden to Aranjuez | 828.84 mi (1,333.89 km) |
| Harpenden to Archena | 947.86 mi (1,525.43 km) |
| Harpenden to Arcos de la Frontera | 1,074.60 mi (1,729.41 km) |
| Harpenden to Arenys de Mar | 720.31 mi (1,159.22 km) |
| Harpenden to Arenys de Munt | 718.12 mi (1,155.70 km) |
