| Boulogne-sur-Mer to Beausoleil | 553.81 mi (891.27 km) |
| Boulogne-sur-Mer to Beauvais | 92.05 mi (148.14 km) |
| Boulogne-sur-Mer to Begles | 420.98 mi (677.51 km) |
| Boulogne-sur-Mer to Belfort | 318.26 mi (512.19 km) |
| Boulogne-sur-Mer to Bellegarde-sur-Valserine | 372.87 mi (600.08 km) |
| Boulogne-sur-Mer to Bellerive-sur-Allier | 328.89 mi (529.30 km) |
| Boulogne-sur-Mer to Bellevue | 132.72 mi (213.59 km) |
| Boulogne-sur-Mer to Belley | 390.90 mi (629.10 km) |
| Boulogne-sur-Mer to Berck-sur-Mer | 22.00 mi (35.40 km) |
| Boulogne-sur-Mer to Bergerac | 409.41 mi (658.88 km) |
| Boulogne-sur-Mer to Bernay | 121.86 mi (196.12 km) |
| Boulogne-sur-Mer to Berre-l'Etang | 527.96 mi (849.67 km) |
| Boulogne-sur-Mer to Besancon | 312.82 mi (503.44 km) |
| Boulogne-sur-Mer to Bethune | 46.97 mi (75.59 km) |
| Boulogne-sur-Mer to Betton | 228.68 mi (368.02 km) |
