| Boulogne-sur-Mer to Carovigno | 1,035.02 mi (1,665.70 km) |
| Boulogne-sur-Mer to Carpenedolo | 549.86 mi (884.91 km) |
| Boulogne-sur-Mer to Carpi | 594.13 mi (956.16 km) |
| Boulogne-sur-Mer to Carrara | 606.17 mi (975.53 km) |
| Boulogne-sur-Mer to Carugate | 504.05 mi (811.18 km) |
| Boulogne-sur-Mer to Casal di Principe | 899.10 mi (1,446.96 km) |
| Boulogne-sur-Mer to Casale Monferrato | 499.23 mi (803.43 km) |
| Boulogne-sur-Mer to Casale sul Sile | 606.88 mi (976.68 km) |
| Boulogne-sur-Mer to Casalecchio di Reno | 622.70 mi (1,002.14 km) |
| Boulogne-sur-Mer to Casalgrande | 599.38 mi (964.61 km) |
| Boulogne-sur-Mer to Casalmaggiore | 568.28 mi (914.55 km) |
| Boulogne-sur-Mer to Casalnuovo di Napoli | 911.47 mi (1,466.88 km) |
| Boulogne-sur-Mer to Casalpusterlengo | 533.48 mi (858.56 km) |
| Boulogne-sur-Mer to Casaluce | 902.14 mi (1,451.85 km) |
| Boulogne-sur-Mer to Casamassima | 995.82 mi (1,602.62 km) |
