| Boulogne-sur-Mer to Beyne-Heusay | 176.84 mi (284.60 km) |
| Boulogne-sur-Mer to Bierbeek | 137.89 mi (221.91 km) |
| Boulogne-sur-Mer to Bilzen | 170.66 mi (274.66 km) |
| Boulogne-sur-Mer to Binche | 114.25 mi (183.87 km) |
| Boulogne-sur-Mer to Bissegem | 70.28 mi (113.10 km) |
| Boulogne-sur-Mer to Blankenberge | 76.38 mi (122.92 km) |
| Boulogne-sur-Mer to Blegny | 180.28 mi (290.13 km) |
| Boulogne-sur-Mer to Bocholt | 175.29 mi (282.09 km) |
| Boulogne-sur-Mer to Boechout | 128.27 mi (206.43 km) |
| Boulogne-sur-Mer to Bonheiden | 128.98 mi (207.57 km) |
| Boulogne-sur-Mer to Boom | 122.41 mi (197.00 km) |
| Boulogne-sur-Mer to Boortmeerbeek | 129.97 mi (209.16 km) |
| Boulogne-sur-Mer to Borgerhout | 127.44 mi (205.10 km) |
| Boulogne-sur-Mer to Borgloon | 163.02 mi (262.35 km) |
| Boulogne-sur-Mer to Bornem | 116.95 mi (188.22 km) |
