| Welwyn Garden City to Legionowo | 892.25 mi (1,435.94 km) |
| Welwyn Garden City to Legnica | 703.01 mi (1,131.38 km) |
| Welwyn Garden City to Leszno | 714.72 mi (1,150.22 km) |
| Welwyn Garden City to Lezajsk | 984.78 mi (1,584.86 km) |
| Welwyn Garden City to Libiaz | 854.69 mi (1,375.50 km) |
| Welwyn Garden City to Lidzbark | 844.35 mi (1,358.85 km) |
| Welwyn Garden City to Lidzbark Warminski | 875.96 mi (1,409.72 km) |
| Welwyn Garden City to Limanowa | 909.85 mi (1,464.26 km) |
| Welwyn Garden City to Lipno | 818.16 mi (1,316.69 km) |
| Welwyn Garden City to Lobez | 672.11 mi (1,081.66 km) |
| Welwyn Garden City to Lodz | 837.12 mi (1,347.22 km) |
| Welwyn Garden City to Lomianki | 892.73 mi (1,436.71 km) |
| Welwyn Garden City to Lomza | 937.67 mi (1,509.03 km) |
| Welwyn Garden City to Lowicz | 854.53 mi (1,375.24 km) |
| Welwyn Garden City to Lubaczow | 1,016.06 mi (1,635.19 km) |
