| Gretna to Homer Glen (Illinois) | 816.46 mi (1,313.97 km) |
| Gretna to Homestead (Florida) | 662.61 mi (1,066.37 km) |
| Gretna to Homewood (Alabama) | 310.71 mi (500.04 km) |
| Gretna to Homewood (Illinois) | 815.86 mi (1,313.00 km) |
| Gretna to Homosassa Springs (Florida) | 458.61 mi (738.05 km) |
| Gretna to Honeygo (Maryland) | 1,012.74 mi (1,629.85 km) |
| Gretna to Honolulu (Hawaii) | 4,206.93 mi (6,770.39 km) |
| Gretna to Hoover (Alabama) | 306.20 mi (492.78 km) |
| Gretna to Hopatcong (New Jersey) | 1,151.42 mi (1,853.03 km) |
| Gretna to Hope Mills (North Carolina) | 734.58 mi (1,182.20 km) |
| Gretna to Hopewell (Virginia) | 892.37 mi (1,436.13 km) |
| Gretna to Hopkins (Minnesota) | 1,053.43 mi (1,695.34 km) |
| Gretna to Hopkinsville (Kentucky) | 501.13 mi (806.49 km) |
| Gretna to Horizon City (Texas) | 964.73 mi (1,552.58 km) |
| Gretna to Horizon West (Florida) | 518.85 mi (835.02 km) |
