| Port Huron to Coudekerque-Branche | 3,810.24 mi (6,131.98 km) |
| Port Huron to Coueron | 3,766.44 mi (6,061.50 km) |
| Port Huron to Coulommiers | 3,909.62 mi (6,291.93 km) |
| Port Huron to Courbevoic | 3,873.81 mi (6,234.30 km) |
| Port Huron to Courcouronnes | 3,889.95 mi (6,260.27 km) |
| Port Huron to Cournon-d'Auvergne | 4,020.38 mi (6,470.18 km) |
| Port Huron to Courrieres | 3,849.97 mi (6,195.93 km) |
| Port Huron to Coutras | 3,905.37 mi (6,285.09 km) |
| Port Huron to Couzeix | 3,934.30 mi (6,331.65 km) |
| Port Huron to Cran-Gevrier | 4,133.82 mi (6,652.75 km) |
| Port Huron to Craponne | 4,083.19 mi (6,571.26 km) |
| Port Huron to Creil | 3,871.06 mi (6,229.86 km) |
| Port Huron to Crepy-en-Valois | 3,887.85 mi (6,256.89 km) |
| Port Huron to Crest | 4,132.71 mi (6,650.95 km) |
| Port Huron to Creteil | 3,885.72 mi (6,253.46 km) |
