| Boulogne-sur-Mer to Berga | 596.13 mi (959.37 km) |
| Boulogne-sur-Mer to Berja | 985.22 mi (1,585.56 km) |
| Boulogne-sur-Mer to Bermeo | 544.35 mi (876.04 km) |
| Boulogne-sur-Mer to Berriozar | 566.75 mi (912.10 km) |
| Boulogne-sur-Mer to Betanzos | 690.99 mi (1,112.04 km) |
| Boulogne-sur-Mer to Betera | 775.84 mi (1,248.60 km) |
| Boulogne-sur-Mer to Bilbao | 558.39 mi (898.64 km) |
| Boulogne-sur-Mer to Binefar | 616.48 mi (992.12 km) |
| Boulogne-sur-Mer to Binisalem | 765.29 mi (1,231.62 km) |
| Boulogne-sur-Mer to Blanes | 627.97 mi (1,010.62 km) |
| Boulogne-sur-Mer to Boadilla del Monte | 760.31 mi (1,223.61 km) |
| Boulogne-sur-Mer to Boiro | 746.71 mi (1,201.72 km) |
| Boulogne-sur-Mer to Bolanos de Calatrava | 858.44 mi (1,381.53 km) |
| Boulogne-sur-Mer to Bollullos de la Mitacion | 1,000.89 mi (1,610.77 km) |
| Boulogne-sur-Mer to Bollullos par del Condado | 1,008.45 mi (1,622.94 km) |
