| Harpenden to Ashby de la Zouch | 79.82 mi (128.46 km) |
| Harpenden to Ashford | 70.03 mi (112.71 km) |
| Harpenden to Ashford | 26.93 mi (43.33 km) |
| Harpenden to Ashington | 237.69 mi (382.53 km) |
| Harpenden to Ashtead | 35.14 mi (56.55 km) |
| Harpenden to Ashton | 136.68 mi (219.97 km) |
| Harpenden to Ashton in Makerfield | 150.01 mi (241.42 km) |
| Harpenden to Astley | 145.66 mi (234.42 km) |
| Harpenden to Atherstone | 72.95 mi (117.40 km) |
| Harpenden to Atherton | 148.12 mi (238.38 km) |
| Harpenden to Attleborough | 75.65 mi (121.75 km) |
| Harpenden to Aveley | 33.91 mi (54.57 km) |
| Harpenden to Aylesbury | 19.65 mi (31.62 km) |
| Harpenden to Aylesford | 50.39 mi (81.10 km) |
| Harpenden to Aylestone | 64.07 mi (103.11 km) |
