| Harpenden to La Union | 981.34 mi (1,579.31 km) |
| Harpenden to La Victoria de Acentejo | 1,816.92 mi (2,924.05 km) |
| Harpenden to Laguna de Duero | 736.39 mi (1,185.10 km) |
| Harpenden to Lalin | 729.73 mi (1,174.39 km) |
| Harpenden to Lardero | 656.34 mi (1,056.28 km) |
| Harpenden to Laredo | 597.67 mi (961.85 km) |
| Harpenden to Las Cabezas de San Juan | 1,060.73 mi (1,707.08 km) |
| Harpenden to Las Palmas | 1,812.92 mi (2,917.62 km) |
| Harpenden to Las Rozas de Madrid | 800.23 mi (1,287.84 km) |
| Harpenden to Las Torres de Cotillas | 953.85 mi (1,535.07 km) |
| Harpenden to Lebrija | 1,066.66 mi (1,716.63 km) |
| Harpenden to Leganes | 810.28 mi (1,304.01 km) |
| Harpenden to Leon | 681.52 mi (1,096.80 km) |
| Harpenden to Lepe | 1,060.13 mi (1,706.11 km) |
| Harpenden to Linares | 962.15 mi (1,548.43 km) |
