| Cities | Distance |
|---|---|
| Harpenden to Adel | 149.48 mi (240.57 km) |
| Harpenden to Adwick le Street | 125.95 mi (202.69 km) |
| Harpenden to Ainsdale | 166.91 mi (268.61 km) |
| Harpenden to Airdrie | 315.95 mi (508.47 km) |
| Harpenden to Aldenham | 10.03 mi (16.15 km) |
| Harpenden to Aldershot | 43.08 mi (69.33 km) |
| Harpenden to Aldridge | 85.79 mi (138.07 km) |
| Harpenden to Alfreton | 98.42 mi (158.39 km) |
| Harpenden to Allestree | 91.80 mi (147.73 km) |
| Harpenden to Alloa | 328.17 mi (528.14 km) |
| Harpenden to Almondbury | 138.46 mi (222.84 km) |
| Harpenden to Alsager | 120.66 mi (194.19 km) |
| Harpenden to Alton | 53.39 mi (85.92 km) |
| Harpenden to Altrincham | 137.00 mi (220.48 km) |
| Harpenden to Amblecote | 88.58 mi (142.55 km) |