| Key West to Commerce (California) | 2,273.59 mi (3,658.98 km) |
| Key West to Commerce City (Colorado) | 1,704.31 mi (2,742.82 km) |
| Key West to Compton (California) | 2,277.05 mi (3,664.55 km) |
| Key West to Comstock Park (Michigan) | 1,295.91 mi (2,085.56 km) |
| Key West to Concord (California) | 2,526.28 mi (4,065.66 km) |
| Key West to Concord (Missouri) | 1,086.80 mi (1,749.03 km) |
| Key West to Concord (New Hampshire) | 1,413.96 mi (2,275.55 km) |
| Key West to Concord (North Carolina) | 751.31 mi (1,209.11 km) |
| Key West to Conneaut (Ohio) | 1,201.68 mi (1,933.92 km) |
| Key West to Connersville (Indiana) | 1,061.08 mi (1,707.64 km) |
| Key West to Conroe (Texas) | 928.85 mi (1,494.84 km) |
| Key West to Converse (Texas) | 1,071.96 mi (1,725.15 km) |
| Key West to Conway (Arkansas) | 967.27 mi (1,556.67 km) |
| Key West to Conway (Florida) | 273.11 mi (439.53 km) |
| Key West to Conway (South Carolina) | 661.69 mi (1,064.89 km) |
