| Clay to Cognac | 4,438.02 mi (7,142.30 km) |
| Clay to Cogolin | 4,815.72 mi (7,750.15 km) |
| Clay to Colmar | 4,699.33 mi (7,562.84 km) |
| Clay to Colombes | 4,462.83 mi (7,182.23 km) |
| Clay to Colomiers | 4,570.83 mi (7,356.04 km) |
| Clay to Combs-la-Ville | 4,482.59 mi (7,214.03 km) |
| Clay to Comines | 4,444.72 mi (7,153.08 km) |
| Clay to Compiegne | 4,473.29 mi (7,199.07 km) |
| Clay to Concarneau | 4,225.26 mi (6,799.89 km) |
| Clay to Conde-sur-l'Escaut | 4,476.64 mi (7,204.45 km) |
| Clay to Conflans-Sainte-Honorine | 4,454.36 mi (7,168.61 km) |
| Clay to Corbas | 4,668.86 mi (7,513.81 km) |
| Clay to Corbeil-Essonnes | 4,480.84 mi (7,211.22 km) |
| Clay to Cormeilles-en-Parisis | 4,459.35 mi (7,176.63 km) |
| Clay to Cosne sur Loire | 4,532.91 mi (7,295.02 km) |
