| Cities | Distance |
|---|---|
| Harpenden to Lye | 86.93 mi (139.90 km) |
| Harpenden to Lymington | 90.10 mi (145.00 km) |
| Harpenden to Lymm | 140.13 mi (225.52 km) |
| Harpenden to Mablethorpe | 108.36 mi (174.39 km) |
| Harpenden to Macclesfield | 124.00 mi (199.56 km) |
| Harpenden to Mackworth | 91.55 mi (147.34 km) |
| Harpenden to Madeley | 105.22 mi (169.33 km) |
| Harpenden to Maesteg | 141.88 mi (228.34 km) |
| Harpenden to Maghull | 159.96 mi (257.44 km) |
| Harpenden to Maidenhead | 25.74 mi (41.43 km) |
| Harpenden to Maidstone | 53.43 mi (85.99 km) |
| Harpenden to Maldon | 44.35 mi (71.38 km) |
| Harpenden to Maltby | 116.81 mi (187.99 km) |
| Harpenden to Manchester | 139.56 mi (224.61 km) |
| Harpenden to Mansfield | 98.32 mi (158.23 km) |