| Key Largo to Jacksonville (North Carolina) | 687.79 mi (1,106.90 km) |
| Key Largo to Jacksonville (Texas) | 1,016.34 mi (1,635.65 km) |
| Key Largo to Jacksonville Beach (Florida) | 361.36 mi (581.56 km) |
| Key Largo to James Island (South Carolina) | 526.77 mi (847.76 km) |
| Key Largo to Jamestown (New York) | 1,174.79 mi (1,890.64 km) |
| Key Largo to Jamestown (North Dakota) | 1,809.26 mi (2,911.72 km) |
| Key Largo to Janesville (Wisconsin) | 1,308.13 mi (2,105.23 km) |
| Key Largo to Jasmine Estates (Florida) | 260.31 mi (418.93 km) |
| Key Largo to Jasper (Alabama) | 730.19 mi (1,175.13 km) |
| Key Largo to Jasper (Indiana) | 993.17 mi (1,598.35 km) |
| Key Largo to Jefferson (Georgia) | 651.55 mi (1,048.57 km) |
| Key Largo to Jefferson (Louisiana) | 683.74 mi (1,100.37 km) |
| Key Largo to Jefferson City (Missouri) | 1,155.22 mi (1,859.14 km) |
| Key Largo to Jefferson Hills (Pennsylvania) | 1,048.52 mi (1,687.44 km) |
| Key Largo to Jefferson Valley-Yorktown (New York) | 1,181.49 mi (1,901.43 km) |
