| Key West to Jeffersontown (Kentucky) | 968.40 mi (1,558.50 km) |
| Key West to Jeffersonville (Indiana) | 979.09 mi (1,575.69 km) |
| Key West to Jenison (Michigan) | 1,288.07 mi (2,072.95 km) |
| Key West to Jenks (Oklahoma) | 1,155.77 mi (1,860.03 km) |
| Key West to Jennings (Missouri) | 1,097.00 mi (1,765.45 km) |
| Key West to Jensen Beach (Florida) | 208.27 mi (335.18 km) |
| Key West to Jericho (New York) | 1,217.51 mi (1,959.40 km) |
| Key West to Jerome (Idaho) | 2,240.47 mi (3,605.68 km) |
| Key West to Jersey City (New Jersey) | 1,201.61 mi (1,933.81 km) |
| Key West to Jessup (Maryland) | 1,049.07 mi (1,688.31 km) |
| Key West to Johns Creek (Georgia) | 670.30 mi (1,078.75 km) |
| Key West to Johnson City (New York) | 1,257.95 mi (2,024.47 km) |
| Key West to Johnson City (Tennessee) | 814.46 mi (1,310.74 km) |
| Key West to Johnston (Iowa) | 1,367.27 mi (2,200.41 km) |
| Key West to Johnstown (Colorado) | 1,726.70 mi (2,778.85 km) |
