| Boulogne-sur-Mer to Benevento | 913.77 mi (1,470.57 km) |
| Boulogne-sur-Mer to Bergamo | 507.80 mi (817.23 km) |
| Boulogne-sur-Mer to Bernalda | 1,015.43 mi (1,634.18 km) |
| Boulogne-sur-Mer to Bertinoro | 668.23 mi (1,075.41 km) |
| Boulogne-sur-Mer to Besana in Brianza | 494.76 mi (796.24 km) |
| Boulogne-sur-Mer to Besozzo | 467.17 mi (751.84 km) |
| Boulogne-sur-Mer to Biancavilla | 1,113.21 mi (1,791.53 km) |
| Boulogne-sur-Mer to Biassono | 497.62 mi (800.84 km) |
| Boulogne-sur-Mer to Bibbiano | 586.38 mi (943.68 km) |
| Boulogne-sur-Mer to Bibbiena | 680.68 mi (1,095.45 km) |
| Boulogne-sur-Mer to Biella | 463.93 mi (746.62 km) |
| Boulogne-sur-Mer to Bisceglie | 966.43 mi (1,555.32 km) |
| Boulogne-sur-Mer to Bisignano | 1,050.38 mi (1,690.43 km) |
| Boulogne-sur-Mer to Bitetto | 985.72 mi (1,586.36 km) |
| Boulogne-sur-Mer to Bitonto | 979.12 mi (1,575.74 km) |
