| Harpenden to Lapua | 1,150.21 mi (1,851.08 km) |
| Harpenden to Laukaa | 1,214.57 mi (1,954.65 km) |
| Harpenden to Lauritsala | 1,251.16 mi (2,013.55 km) |
| Harpenden to Lempaala | 1,117.51 mi (1,798.46 km) |
| Harpenden to Leppavirta | 1,270.42 mi (2,044.54 km) |
| Harpenden to Lieksa | 1,356.82 mi (2,183.59 km) |
| Harpenden to Lieto | 1,054.22 mi (1,696.61 km) |
| Harpenden to Liminka | 1,279.27 mi (2,058.79 km) |
| Harpenden to Liperi | 1,318.85 mi (2,122.48 km) |
| Harpenden to Lohja | 1,098.46 mi (1,767.80 km) |
| Harpenden to Loimaa | 1,083.00 mi (1,742.92 km) |
| Harpenden to Loviisa | 1,172.99 mi (1,887.74 km) |
| Harpenden to Mantsala | 1,147.69 mi (1,847.03 km) |
| Harpenden to Mariehamn | 964.66 mi (1,552.48 km) |
| Harpenden to Masku | 1,045.49 mi (1,682.56 km) |
