| Cities | Distance |
|---|---|
| Harpenden to Lambeth | 24.74 mi (39.82 km) |
| Harpenden to Lanark | 300.93 mi (484.30 km) |
| Harpenden to Lancaster | 184.83 mi (297.46 km) |
| Harpenden to Lancing | 68.11 mi (109.61 km) |
| Harpenden to Larbert | 323.02 mi (519.85 km) |
| Harpenden to Largs | 330.75 mi (532.30 km) |
| Harpenden to Larkhall | 308.41 mi (496.34 km) |
| Harpenden to Launceston | 191.59 mi (308.34 km) |
| Harpenden to Leagrave | 7.64 mi (12.30 km) |
| Harpenden to Leatherhead | 36.12 mi (58.12 km) |
| Harpenden to Ledbury | 89.50 mi (144.04 km) |
| Harpenden to Leeds | 145.83 mi (234.70 km) |
| Harpenden to Leek | 113.57 mi (182.77 km) |
| Harpenden to Leicester | 65.38 mi (105.21 km) |
| Harpenden to Leigh | 147.26 mi (236.99 km) |