| Key West to Cognac | 4,623.95 mi (7,441.52 km) |
| Key West to Cogolin | 4,993.85 mi (8,036.82 km) |
| Key West to Colmar | 4,935.08 mi (7,942.24 km) |
| Key West to Colombes | 4,694.37 mi (7,554.87 km) |
| Key West to Colomiers | 4,736.29 mi (7,622.32 km) |
| Key West to Combs-la-Ville | 4,711.90 mi (7,583.07 km) |
| Key West to Comines | 4,699.81 mi (7,563.61 km) |
| Key West to Compiegne | 4,712.08 mi (7,583.37 km) |
| Key West to Concarneau | 4,429.61 mi (7,128.77 km) |
| Key West to Conde-sur-l'Escaut | 4,729.46 mi (7,611.34 km) |
| Key West to Conflans-Sainte-Honorine | 4,686.43 mi (7,542.08 km) |
| Key West to Corbas | 4,869.53 mi (7,836.76 km) |
| Key West to Corbeil-Essonnes | 4,709.29 mi (7,578.88 km) |
| Key West to Cormeilles-en-Parisis | 4,691.37 mi (7,550.03 km) |
| Key West to Cosne sur Loire | 4,748.28 mi (7,641.61 km) |
