| Boulogne-Billancourt to Cologno al Serio | 415.71 mi (669.02 km) |
| Boulogne-Billancourt to Cologno Monzese | 401.50 mi (646.16 km) |
| Boulogne-Billancourt to Colorno | 469.20 mi (755.10 km) |
| Boulogne-Billancourt to Comacchio | 549.83 mi (884.87 km) |
| Boulogne-Billancourt to Comiso | 1,029.56 mi (1,656.91 km) |
| Boulogne-Billancourt to Como | 382.48 mi (615.55 km) |
| Boulogne-Billancourt to Concordia Sagittaria | 539.82 mi (868.75 km) |
| Boulogne-Billancourt to Concorezzo | 401.20 mi (645.67 km) |
| Boulogne-Billancourt to Conegliano | 512.34 mi (824.54 km) |
| Boulogne-Billancourt to Conselice | 543.27 mi (874.30 km) |
| Boulogne-Billancourt to Conselve | 516.57 mi (831.34 km) |
| Boulogne-Billancourt to Conversano | 905.98 mi (1,458.03 km) |
| Boulogne-Billancourt to Copertino | 974.73 mi (1,568.67 km) |
| Boulogne-Billancourt to Copparo | 527.86 mi (849.51 km) |
| Boulogne-Billancourt to Corato | 869.78 mi (1,399.78 km) |
