| Boulogne-sur-Mer to Bad Honnef am Rhein | 245.68 mi (395.39 km) |
| Boulogne-sur-Mer to Bad Iburg | 294.05 mi (473.23 km) |
| Boulogne-sur-Mer to Bad Kissingen | 373.31 mi (600.79 km) |
| Boulogne-sur-Mer to Bad Konig | 333.84 mi (537.26 km) |
| Boulogne-sur-Mer to Bad Kreuznach | 282.47 mi (454.59 km) |
| Boulogne-sur-Mer to Bad Krozingen | 335.67 mi (540.22 km) |
| Boulogne-sur-Mer to Bad Laasphe | 297.08 mi (478.11 km) |
| Boulogne-sur-Mer to Bad Laer | 294.65 mi (474.19 km) |
| Boulogne-sur-Mer to Bad Langensalza | 394.06 mi (634.18 km) |
| Boulogne-sur-Mer to Bad Lauchstadt | 445.71 mi (717.30 km) |
| Boulogne-sur-Mer to Bad Lauterberg | 388.40 mi (625.07 km) |
| Boulogne-sur-Mer to Bad Liebenwerda | 513.44 mi (826.31 km) |
| Boulogne-sur-Mer to Bad Liebenzell | 344.97 mi (555.18 km) |
| Boulogne-sur-Mer to Bad Lippspringe | 319.73 mi (514.56 km) |
| Boulogne-sur-Mer to Bad Mergentheim | 370.79 mi (596.73 km) |
