| Round Lake Beach to Jacksonville (North Carolina) | 781.68 mi (1,257.99 km) |
| Round Lake Beach to Jacksonville (Texas) | 820.28 mi (1,320.12 km) |
| Round Lake Beach to Jacksonville Beach (Florida) | 914.20 mi (1,471.26 km) |
| Round Lake Beach to James Island (South Carolina) | 800.89 mi (1,288.91 km) |
| Round Lake Beach to Jamestown (New York) | 452.64 mi (728.45 km) |
| Round Lake Beach to Jamestown (North Dakota) | 607.53 mi (977.72 km) |
| Round Lake Beach to Janesville (Wisconsin) | 51.98 mi (83.65 km) |
| Round Lake Beach to Jasmine Estates (Florida) | 1,018.99 mi (1,639.91 km) |
| Round Lake Beach to Jasper (Alabama) | 590.88 mi (950.93 km) |
| Round Lake Beach to Jasper (Indiana) | 281.85 mi (453.60 km) |
| Round Lake Beach to Jefferson (Georgia) | 618.89 mi (996.01 km) |
| Round Lake Beach to Jefferson (Louisiana) | 865.70 mi (1,393.21 km) |
| Round Lake Beach to Jefferson City (Missouri) | 340.02 mi (547.20 km) |
| Round Lake Beach to Jefferson Hills (Pennsylvania) | 446.40 mi (718.42 km) |
| Round Lake Beach to Jefferson Valley-Yorktown (New York) | 737.75 mi (1,187.29 km) |
