| Boulogne-sur-Mer to Bougival | 130.72 mi (210.38 km) |
| Boulogne-sur-Mer to Bouguenais | 285.74 mi (459.86 km) |
| Boulogne-sur-Mer to Boulogne-Billancourt | 133.62 mi (215.04 km) |
| Boulogne-sur-Mer to Bourg-de-Peage | 423.94 mi (682.26 km) |
| Boulogne-sur-Mer to Bourg-en-Bresse | 353.43 mi (568.78 km) |
| Boulogne-sur-Mer to Bourg-la-Reine | 138.09 mi (222.24 km) |
| Boulogne-sur-Mer to Bourg-les-Valence | 427.18 mi (687.48 km) |
| Boulogne-sur-Mer to Bourges | 254.13 mi (408.98 km) |
| Boulogne-sur-Mer to Bourgoin-Jallieu | 393.05 mi (632.55 km) |
| Boulogne-sur-Mer to Bressuire | 285.06 mi (458.75 km) |
| Boulogne-sur-Mer to Brest | 317.53 mi (511.02 km) |
| Boulogne-sur-Mer to Bretigny-sur-Orge | 149.36 mi (240.38 km) |
| Boulogne-sur-Mer to Breuillet | 151.32 mi (243.53 km) |
| Boulogne-sur-Mer to Briancon | 465.10 mi (748.51 km) |
| Boulogne-sur-Mer to Brie-Comte-Robert | 147.41 mi (237.23 km) |
