| Gretna to Jeffersonville (Indiana) | 632.97 mi (1,018.67 km) |
| Gretna to Jenison (Michigan) | 927.83 mi (1,493.20 km) |
| Gretna to Jenks (Oklahoma) | 542.72 mi (873.42 km) |
| Gretna to Jennings (Missouri) | 609.04 mi (980.16 km) |
| Gretna to Jensen Beach (Florida) | 622.79 mi (1,002.28 km) |
| Gretna to Jericho (New York) | 1,192.46 mi (1,919.09 km) |
| Gretna to Jerome (Idaho) | 1,614.91 mi (2,598.95 km) |
| Gretna to Jersey City (New Jersey) | 1,166.99 mi (1,878.09 km) |
| Gretna to Jessup (Maryland) | 987.20 mi (1,588.75 km) |
| Gretna to Johns Creek (Georgia) | 445.58 mi (717.09 km) |
| Gretna to Johnson City (New York) | 1,151.02 mi (1,852.39 km) |
| Gretna to Johnson City (Tennessee) | 627.59 mi (1,010.01 km) |
| Gretna to Johnston (Iowa) | 839.36 mi (1,350.81 km) |
| Gretna to Johnstown (Colorado) | 1,105.75 mi (1,779.54 km) |
| Gretna to Johnstown (Pennsylvania) | 954.26 mi (1,535.74 km) |
