| Harpenden to Amelia | 874.78 mi (1,407.82 km) |
| Harpenden to Anagni | 942.13 mi (1,516.22 km) |
| Harpenden to Ancona | 855.74 mi (1,377.18 km) |
| Harpenden to Andria | 1,073.90 mi (1,728.27 km) |
| Harpenden to Angri | 1,042.05 mi (1,677.02 km) |
| Harpenden to Anguillara Sabazia | 895.57 mi (1,441.27 km) |
| Harpenden to Anzio | 941.97 mi (1,515.95 km) |
| Harpenden to Anzola dell'Emilia | 730.09 mi (1,174.96 km) |
| Harpenden to Aosta | 545.89 mi (878.52 km) |
| Harpenden to Apricena | 1,015.72 mi (1,634.64 km) |
| Harpenden to Aprilia | 935.05 mi (1,504.82 km) |
| Harpenden to Aradeo | 1,193.55 mi (1,920.84 km) |
| Harpenden to Aragona | 1,205.54 mi (1,940.13 km) |
| Harpenden to Arco | 652.22 mi (1,049.65 km) |
| Harpenden to Arcola | 711.43 mi (1,144.94 km) |
