| Upper Grand Lagoon to Legionowo | 5,229.32 mi (8,415.77 km) |
| Upper Grand Lagoon to Legnica | 5,094.89 mi (8,199.44 km) |
| Upper Grand Lagoon to Leszno | 5,089.94 mi (8,191.47 km) |
| Upper Grand Lagoon to Lezajsk | 5,364.18 mi (8,632.81 km) |
| Upper Grand Lagoon to Libiaz | 5,252.92 mi (8,453.77 km) |
| Upper Grand Lagoon to Lidzbark | 5,160.81 mi (8,305.52 km) |
| Upper Grand Lagoon to Lidzbark Warminski | 5,157.69 mi (8,300.50 km) |
| Upper Grand Lagoon to Limanowa | 5,309.48 mi (8,544.78 km) |
| Upper Grand Lagoon to Lipno | 5,151.52 mi (8,290.57 km) |
| Upper Grand Lagoon to Lobez | 4,996.74 mi (8,041.47 km) |
| Upper Grand Lagoon to Lodz | 5,199.28 mi (8,367.43 km) |
| Upper Grand Lagoon to Lomianki | 5,231.71 mi (8,419.62 km) |
| Upper Grand Lagoon to Lomza | 5,243.57 mi (8,438.71 km) |
| Upper Grand Lagoon to Lowicz | 5,205.51 mi (8,377.46 km) |
| Upper Grand Lagoon to Lubaczow | 5,393.91 mi (8,680.66 km) |
