| Boulogne-sur-Mer to Beuvry | 48.81 mi (78.55 km) |
| Boulogne-sur-Mer to Beziers | 515.36 mi (829.39 km) |
| Boulogne-sur-Mer to Bezons | 127.26 mi (204.80 km) |
| Boulogne-sur-Mer to Biarritz | 522.34 mi (840.62 km) |
| Boulogne-sur-Mer to Biganos | 437.13 mi (703.49 km) |
| Boulogne-sur-Mer to Billere | 521.57 mi (839.39 km) |
| Boulogne-sur-Mer to Biot | 553.49 mi (890.76 km) |
| Boulogne-sur-Mer to Biscarrosse | 456.28 mi (734.31 km) |
| Boulogne-sur-Mer to Bischheim | 310.70 mi (500.02 km) |
| Boulogne-sur-Mer to Bischwiller | 309.72 mi (498.44 km) |
| Boulogne-sur-Mer to Blagnac | 489.98 mi (788.55 km) |
| Boulogne-sur-Mer to Blain | 271.58 mi (437.06 km) |
| Boulogne-sur-Mer to Blanquefort | 415.14 mi (668.11 km) |
| Boulogne-sur-Mer to Blois | 216.82 mi (348.94 km) |
| Boulogne-sur-Mer to Bobigny | 130.74 mi (210.40 km) |
