| Boulogne-sur-Mer to Leopoldsburg | 160.85 mi (258.86 km) |
| Boulogne-sur-Mer to Lessines | 97.05 mi (156.18 km) |
| Boulogne-sur-Mer to Leuven | 135.14 mi (217.49 km) |
| Boulogne-sur-Mer to Lichtervelde | 69.51 mi (111.87 km) |
| Boulogne-sur-Mer to Liedekerke | 108.24 mi (174.19 km) |
| Boulogne-sur-Mer to Liege | 173.27 mi (278.84 km) |
| Boulogne-sur-Mer to Lierre | 131.58 mi (211.76 km) |
| Boulogne-sur-Mer to Lille | 144.31 mi (232.25 km) |
| Boulogne-sur-Mer to Lint | 127.81 mi (205.69 km) |
| Boulogne-sur-Mer to Lochristi | 100.03 mi (160.99 km) |
| Boulogne-sur-Mer to Lokeren | 106.36 mi (171.17 km) |
| Boulogne-sur-Mer to Lommel | 164.78 mi (265.20 km) |
| Boulogne-sur-Mer to Londerzeel | 118.61 mi (190.89 km) |
| Boulogne-sur-Mer to Louvain-la-Neuve | 126.34 mi (203.32 km) |
| Boulogne-sur-Mer to Lovendegem | 90.25 mi (145.25 km) |
