| Boulogne-sur-Mer to Corbetta | 495.12 mi (796.82 km) |
| Boulogne-sur-Mer to Corciano | 725.67 mi (1,167.85 km) |
| Boulogne-sur-Mer to Cordenons | 604.39 mi (972.67 km) |
| Boulogne-sur-Mer to Cori | 826.27 mi (1,329.76 km) |
| Boulogne-sur-Mer to Coriano | 693.39 mi (1,115.90 km) |
| Boulogne-sur-Mer to Corigliano Calabro | 1,053.49 mi (1,695.43 km) |
| Boulogne-sur-Mer to Corleone | 1,060.10 mi (1,706.06 km) |
| Boulogne-sur-Mer to Cormano | 498.68 mi (802.54 km) |
| Boulogne-sur-Mer to Cornaredo | 497.04 mi (799.90 km) |
| Boulogne-sur-Mer to Cornate d'Adda | 503.31 mi (810.00 km) |
| Boulogne-sur-Mer to Cornedo Vicentino | 570.06 mi (917.43 km) |
| Boulogne-sur-Mer to Correggio | 591.42 mi (951.79 km) |
| Boulogne-sur-Mer to Corridonia | 760.88 mi (1,224.51 km) |
| Boulogne-sur-Mer to Corsico | 503.16 mi (809.77 km) |
| Boulogne-sur-Mer to Cortona | 708.59 mi (1,140.36 km) |
