| Boulogne-sur-Mer to Borsbeek | 129.04 mi (207.67 km) |
| Boulogne-sur-Mer to Boussu | 97.83 mi (157.44 km) |
| Boulogne-sur-Mer to Braine-l'Alleud | 120.68 mi (194.21 km) |
| Boulogne-sur-Mer to Braine-le-Chateau | 116.08 mi (186.81 km) |
| Boulogne-sur-Mer to Braine-le-Comte | 110.65 mi (178.07 km) |
| Boulogne-sur-Mer to Brasschaat | 130.95 mi (210.75 km) |
| Boulogne-sur-Mer to Brecht | 138.03 mi (222.14 km) |
| Boulogne-sur-Mer to Bredene | 68.79 mi (110.71 km) |
| Boulogne-sur-Mer to Bree | 175.07 mi (281.75 km) |
| Boulogne-sur-Mer to Bruges | 77.56 mi (124.82 km) |
| Boulogne-sur-Mer to Brussels | 119.87 mi (192.92 km) |
| Boulogne-sur-Mer to Buggenhout | 114.31 mi (183.97 km) |
| Boulogne-sur-Mer to Chapelle-lez-Herlaimont | 118.40 mi (190.55 km) |
| Boulogne-sur-Mer to Charleroi | 125.74 mi (202.36 km) |
| Boulogne-sur-Mer to Chatelet | 129.34 mi (208.15 km) |
