| Gretna to Harrison (Wisconsin) | 991.57 mi (1,595.77 km) |
| Gretna to Harrisonburg (Virginia) | 867.82 mi (1,396.63 km) |
| Gretna to Hartford (Connecticut) | 1,267.38 mi (2,039.64 km) |
| Gretna to Hartford (Wisconsin) | 931.27 mi (1,498.73 km) |
| Gretna to Hartselle (Alabama) | 361.94 mi (582.49 km) |
| Gretna to Hartsville (Tennessee) | 501.21 mi (806.62 km) |
| Gretna to Harvey (Illinois) | 819.24 mi (1,318.44 km) |
| Gretna to Harvey (Louisiana) | 1.80 mi (2.89 km) |
| Gretna to Hasbrouck Heights (New Jersey) | 1,172.43 mi (1,886.85 km) |
| Gretna to Haslett (Michigan) | 940.80 mi (1,514.08 km) |
| Gretna to Hastings (Minnesota) | 1,035.41 mi (1,666.34 km) |
| Gretna to Hastings (Nebraska) | 874.50 mi (1,407.37 km) |
| Gretna to Hattiesburg (Mississippi) | 105.96 mi (170.53 km) |
| Gretna to Hauppauge (New York) | 1,208.16 mi (1,944.34 km) |
| Gretna to Havelock (North Carolina) | 840.42 mi (1,352.52 km) |
