| Key Largo to Cognac | 4,534.10 mi (7,296.92 km) |
| Key Largo to Cogolin | 4,903.44 mi (7,891.33 km) |
| Key Largo to Colmar | 4,847.27 mi (7,800.92 km) |
| Key Largo to Colombes | 4,606.55 mi (7,413.53 km) |
| Key Largo to Colomiers | 4,645.58 mi (7,476.34 km) |
| Key Largo to Combs-la-Ville | 4,623.95 mi (7,441.53 km) |
| Key Largo to Comines | 4,613.23 mi (7,424.28 km) |
| Key Largo to Compiegne | 4,624.62 mi (7,442.60 km) |
| Key Largo to Concarneau | 4,340.71 mi (6,985.70 km) |
| Key Largo to Conde-sur-l'Escaut | 4,642.73 mi (7,471.76 km) |
| Key Largo to Conflans-Sainte-Honorine | 4,598.64 mi (7,400.79 km) |
| Key Largo to Corbas | 4,780.12 mi (7,692.86 km) |
| Key Largo to Corbeil-Essonnes | 4,621.30 mi (7,437.27 km) |
| Key Largo to Cormeilles-en-Parisis | 4,603.57 mi (7,408.73 km) |
| Key Largo to Cosne sur Loire | 4,659.62 mi (7,498.93 km) |
