| Harpenden to Lichtenau | 395.44 mi (636.40 km) |
| Harpenden to Lichtenfels | 508.24 mi (817.94 km) |
| Harpenden to Lichtenstein | 565.07 mi (909.40 km) |
| Harpenden to Lienen | 354.86 mi (571.09 km) |
| Harpenden to Limbach-Oberfrohna | 568.52 mi (914.95 km) |
| Harpenden to Limburg | 378.24 mi (608.72 km) |
| Harpenden to Limburgerhof | 417.18 mi (671.39 km) |
| Harpenden to Lindau | 536.30 mi (863.09 km) |
| Harpenden to Lindenberg im Allgau | 542.16 mi (872.53 km) |
| Harpenden to Lindlar | 337.72 mi (543.51 km) |
| Harpenden to Lingen | 328.73 mi (529.04 km) |
| Harpenden to Linkenheim-Hochstetten | 427.48 mi (687.96 km) |
| Harpenden to Linnich | 291.09 mi (468.47 km) |
| Harpenden to Lippstadt | 372.24 mi (599.06 km) |
| Harpenden to Lobau | 647.39 mi (1,041.87 km) |
