| Letchworth to La Union | 992.59 mi (1,597.42 km) |
| Letchworth to La Victoria de Acentejo | 1,829.05 mi (2,943.57 km) |
| Letchworth to Laguna de Duero | 748.55 mi (1,204.67 km) |
| Letchworth to Lalin | 741.88 mi (1,193.94 km) |
| Letchworth to Lardero | 668.15 mi (1,075.28 km) |
| Letchworth to Laredo | 609.73 mi (981.27 km) |
| Letchworth to Las Cabezas de San Juan | 1,072.87 mi (1,726.61 km) |
| Letchworth to Las Palmas | 1,825.11 mi (2,937.23 km) |
| Letchworth to Las Rozas de Madrid | 812.23 mi (1,307.16 km) |
| Letchworth to Las Torres de Cotillas | 965.21 mi (1,553.35 km) |
| Letchworth to Lebrija | 1,078.81 mi (1,736.18 km) |
| Letchworth to Leganes | 822.26 mi (1,323.29 km) |
| Letchworth to Leon | 693.77 mi (1,116.51 km) |
| Letchworth to Lepe | 1,072.35 mi (1,725.78 km) |
| Letchworth to Linares | 974.03 mi (1,567.54 km) |
