| Gretna to Jacksonville (Texas) | 339.77 mi (546.81 km) |
| Gretna to Jacksonville Beach (Florida) | 517.42 mi (832.70 km) |
| Gretna to James Island (South Carolina) | 627.64 mi (1,010.08 km) |
| Gretna to Jamestown (New York) | 1,034.68 mi (1,665.15 km) |
| Gretna to Jamestown (North Dakota) | 1,262.20 mi (2,031.32 km) |
| Gretna to Janesville (Wisconsin) | 884.56 mi (1,423.56 km) |
| Gretna to Jasmine Estates (Florida) | 458.11 mi (737.26 km) |
| Gretna to Jasper (Alabama) | 317.37 mi (510.76 km) |
| Gretna to Jasper (Indiana) | 612.42 mi (985.60 km) |
| Gretna to Jefferson (Georgia) | 477.34 mi (768.21 km) |
| Gretna to Jefferson (Louisiana) | 7.14 mi (11.50 km) |
| Gretna to Jefferson City (Missouri) | 610.30 mi (982.19 km) |
| Gretna to Jefferson Hills (Pennsylvania) | 916.11 mi (1,474.34 km) |
| Gretna to Jefferson Valley-Yorktown (New York) | 1,202.32 mi (1,934.94 km) |
| Gretna to Jeffersontown (Kentucky) | 627.68 mi (1,010.15 km) |
