| Key West to Conyers (Georgia) | 642.83 mi (1,034.53 km) |
| Key West to Cookeville (Tennessee) | 830.54 mi (1,336.63 km) |
| Key West to Coolidge (Arizona) | 1,885.09 mi (3,033.76 km) |
| Key West to Coon Rapids (Minnesota) | 1,563.18 mi (2,515.70 km) |
| Key West to Cooper City (Florida) | 138.43 mi (222.78 km) |
| Key West to Coos Bay (Oregon) | 2,719.11 mi (4,375.98 km) |
| Key West to Copiague (New York) | 1,213.65 mi (1,953.18 km) |
| Key West to Coppell (Texas) | 1,087.08 mi (1,749.49 km) |
| Key West to Copperas Cove (Texas) | 1,083.37 mi (1,743.51 km) |
| Key West to Coral Gables (Florida) | 122.77 mi (197.58 km) |
| Key West to Coral Springs (Florida) | 151.23 mi (243.39 km) |
| Key West to Coral Terrace (Florida) | 123.10 mi (198.11 km) |
| Key West to Coralville (Iowa) | 1,310.97 mi (2,109.81 km) |
| Key West to Coram (New York) | 1,235.68 mi (1,988.63 km) |
| Key West to Corcoran (California) | 2,372.39 mi (3,817.99 km) |
