| Harpenden to Leopoldsburg | 246.13 mi (396.11 km) |
| Harpenden to Lessines | 196.25 mi (315.83 km) |
| Harpenden to Leuven | 227.32 mi (365.84 km) |
| Harpenden to Lichtervelde | 159.63 mi (256.89 km) |
| Harpenden to Liedekerke | 202.37 mi (325.68 km) |
| Harpenden to Liege | 268.79 mi (432.58 km) |
| Harpenden to Lierre | 216.86 mi (349.00 km) |
| Harpenden to Lille | 226.49 mi (364.51 km) |
| Harpenden to Lint | 213.66 mi (343.84 km) |
| Harpenden to Lochristi | 186.86 mi (300.72 km) |
| Harpenden to Lokeren | 193.09 mi (310.75 km) |
| Harpenden to Lommel | 246.96 mi (397.44 km) |
| Harpenden to Londerzeel | 208.27 mi (335.18 km) |
| Harpenden to Louvain-la-Neuve | 224.39 mi (361.12 km) |
| Harpenden to Lovendegem | 177.20 mi (285.18 km) |
