| Boulogne-sur-Mer to Bobenheim-Roxheim | 308.79 mi (496.95 km) |
| Boulogne-sur-Mer to Bobingen | 446.16 mi (718.03 km) |
| Boulogne-sur-Mer to Boblingen | 359.29 mi (578.21 km) |
| Boulogne-sur-Mer to Bocholt | 229.25 mi (368.95 km) |
| Boulogne-sur-Mer to Bochum | 248.48 mi (399.88 km) |
| Boulogne-sur-Mer to Bockenem | 377.73 mi (607.89 km) |
| Boulogne-sur-Mer to Bockhorn | 328.56 mi (528.76 km) |
| Boulogne-sur-Mer to Bogen | 508.46 mi (818.29 km) |
| Boulogne-sur-Mer to Bohl-Iggelheim | 311.27 mi (500.94 km) |
| Boulogne-sur-Mer to Bohmte | 309.32 mi (497.81 km) |
| Boulogne-sur-Mer to Boizenburg | 427.23 mi (687.56 km) |
| Boulogne-sur-Mer to Bonen | 272.88 mi (439.16 km) |
| Boulogne-sur-Mer to Bonn | 239.84 mi (385.99 km) |
| Boulogne-sur-Mer to Bopfingen | 410.29 mi (660.29 km) |
| Boulogne-sur-Mer to Boppard | 264.90 mi (426.32 km) |
