| Clay to Coudekerque-Branche | 4,412.94 mi (7,101.94 km) |
| Clay to Coueron | 4,337.14 mi (6,979.96 km) |
| Clay to Coulommiers | 4,500.49 mi (7,242.84 km) |
| Clay to Courbevoic | 4,463.56 mi (7,183.41 km) |
| Clay to Courcouronnes | 4,478.36 mi (7,207.23 km) |
| Clay to Cournon-d'Auvergne | 4,592.34 mi (7,390.66 km) |
| Clay to Courrieres | 4,450.33 mi (7,162.11 km) |
| Clay to Coutras | 4,464.65 mi (7,185.15 km) |
| Clay to Couzeix | 4,502.53 mi (7,246.12 km) |
| Clay to Cran-Gevrier | 4,713.65 mi (7,585.89 km) |
| Clay to Craponne | 4,658.78 mi (7,497.59 km) |
| Clay to Creil | 4,463.44 mi (7,183.22 km) |
| Clay to Crepy-en-Valois | 4,480.86 mi (7,211.25 km) |
| Clay to Crest | 4,702.67 mi (7,568.22 km) |
| Clay to Creteil | 4,475.22 mi (7,202.17 km) |
