| Boulogne-sur-Mer to Cookeville (Tennessee) | 4,226.15 mi (6,801.34 km) |
| Boulogne-sur-Mer to Coolidge (Arizona) | 5,372.25 mi (8,645.80 km) |
| Boulogne-sur-Mer to Coon Rapids (Minnesota) | 4,096.21 mi (6,592.22 km) |
| Boulogne-sur-Mer to Cooper City (Florida) | 4,502.29 mi (7,245.74 km) |
| Boulogne-sur-Mer to Coos Bay (Oregon) | 5,167.97 mi (8,317.05 km) |
| Boulogne-sur-Mer to Copiague (New York) | 3,526.81 mi (5,675.86 km) |
| Boulogne-sur-Mer to Coppell (Texas) | 4,837.68 mi (7,785.50 km) |
| Boulogne-sur-Mer to Copperas Cove (Texas) | 4,969.06 mi (7,996.93 km) |
| Boulogne-sur-Mer to Coral Gables (Florida) | 4,518.80 mi (7,272.30 km) |
| Boulogne-sur-Mer to Coral Springs (Florida) | 4,489.95 mi (7,225.88 km) |
| Boulogne-sur-Mer to Coral Terrace (Florida) | 4,518.09 mi (7,271.17 km) |
| Boulogne-sur-Mer to Coralville (Iowa) | 4,198.02 mi (6,756.06 km) |
| Boulogne-sur-Mer to Coram (New York) | 3,501.93 mi (5,635.82 km) |
| Boulogne-sur-Mer to Corcoran (California) | 5,457.15 mi (8,782.43 km) |
| Boulogne-sur-Mer to Cordele (Georgia) | 4,357.50 mi (7,012.72 km) |
