| Harpenden to Acqui Terme | 637.96 mi (1,026.70 km) |
| Harpenden to Acri | 1,168.18 mi (1,880.01 km) |
| Harpenden to Adelfia | 1,104.66 mi (1,777.78 km) |
| Harpenden to Adrano | 1,224.15 mi (1,970.08 km) |
| Harpenden to Adria | 734.42 mi (1,181.94 km) |
| Harpenden to Afragola | 1,024.03 mi (1,648.02 km) |
| Harpenden to Agliana | 757.42 mi (1,218.94 km) |
| Harpenden to Agrate Brianza | 616.51 mi (992.18 km) |
| Harpenden to Agrigento | 1,209.70 mi (1,946.82 km) |
| Harpenden to Agropoli | 1,076.38 mi (1,732.26 km) |
| Harpenden to Ala | 664.18 mi (1,068.90 km) |
| Harpenden to Alassio | 667.93 mi (1,074.93 km) |
| Harpenden to Alatri | 948.88 mi (1,527.08 km) |
| Harpenden to Alba | 624.16 mi (1,004.49 km) |
| Harpenden to Albano Laziale | 927.26 mi (1,492.27 km) |
