| Boulogne-sur-Mer to Kamenz | 543.55 mi (874.75 km) |
| Boulogne-sur-Mer to Kamp-Lintfort | 219.89 mi (353.88 km) |
| Boulogne-sur-Mer to Kandel | 314.13 mi (505.55 km) |
| Boulogne-sur-Mer to Kappeln | 441.33 mi (710.25 km) |
| Boulogne-sur-Mer to Karben | 316.24 mi (508.94 km) |
| Boulogne-sur-Mer to Karlsdorf-Neuthard | 327.02 mi (526.29 km) |
| Boulogne-sur-Mer to Karlsfeld | 474.65 mi (763.88 km) |
| Boulogne-sur-Mer to Karlsruhe | 324.65 mi (522.48 km) |
| Boulogne-sur-Mer to Kassel | 344.86 mi (555.00 km) |
| Boulogne-sur-Mer to Kaufbeuren | 450.56 mi (725.11 km) |
| Boulogne-sur-Mer to Kaufering | 454.56 mi (731.54 km) |
| Boulogne-sur-Mer to Kaufungen | 349.92 mi (563.15 km) |
| Boulogne-sur-Mer to Kehl | 314.90 mi (506.79 km) |
| Boulogne-sur-Mer to Kelheim | 473.36 mi (761.80 km) |
| Boulogne-sur-Mer to Kelkheim (Taunus) | 303.45 mi (488.35 km) |
