| Boulogne-sur-Mer to Buxtehude | 391.97 mi (630.82 km) |
| Boulogne-sur-Mer to Cadolzburg | 419.22 mi (674.67 km) |
| Boulogne-sur-Mer to Calbe | 445.90 mi (717.61 km) |
| Boulogne-sur-Mer to Calw | 346.79 mi (558.11 km) |
| Boulogne-sur-Mer to Castrop-Rauxel | 253.59 mi (408.11 km) |
| Boulogne-sur-Mer to Celle | 385.52 mi (620.44 km) |
| Boulogne-sur-Mer to Cham | 500.86 mi (806.05 km) |
| Boulogne-sur-Mer to Chemnitz | 493.33 mi (793.94 km) |
| Boulogne-sur-Mer to Clausthal-Zellerfeld | 384.07 mi (618.10 km) |
| Boulogne-sur-Mer to Cloppenburg | 311.57 mi (501.42 km) |
| Boulogne-sur-Mer to Coburg | 411.99 mi (663.03 km) |
| Boulogne-sur-Mer to Coesfeld | 254.04 mi (408.84 km) |
| Boulogne-sur-Mer to Cologne | 233.35 mi (375.55 km) |
| Boulogne-sur-Mer to Coswig | 521.38 mi (839.09 km) |
| Boulogne-sur-Mer to Coswig | 473.64 mi (762.25 km) |
