| Boulogne-sur-Mer to Bagnolet | 133.23 mi (214.41 km) |
| Boulogne-sur-Mer to Bagnols-sur-Ceze | 474.66 mi (763.89 km) |
| Boulogne-sur-Mer to Bailleul | 48.95 mi (78.78 km) |
| Boulogne-sur-Mer to Balma | 491.70 mi (791.32 km) |
| Boulogne-sur-Mer to Bar-le-Duc | 208.27 mi (335.18 km) |
| Boulogne-sur-Mer to Barentin | 86.76 mi (139.62 km) |
| Boulogne-sur-Mer to Basse-Goulaine | 279.89 mi (450.44 km) |
| Boulogne-sur-Mer to Bastia | 666.46 mi (1,072.57 km) |
| Boulogne-sur-Mer to Bayeux | 143.55 mi (231.02 km) |
| Boulogne-sur-Mer to Bayonne | 520.61 mi (837.84 km) |
| Boulogne-sur-Mer to Beaucaire | 498.60 mi (802.42 km) |
| Boulogne-sur-Mer to Beauchamp | 121.06 mi (194.83 km) |
| Boulogne-sur-Mer to Beaumont | 350.28 mi (563.72 km) |
| Boulogne-sur-Mer to Beaumont-sur-Oise | 113.44 mi (182.56 km) |
| Boulogne-sur-Mer to Beaune | 294.69 mi (474.25 km) |
