| Gretna to Murray (Kentucky) | 473.88 mi (762.63 km) |
| Gretna to Murray (Utah) | 1,431.85 mi (2,304.34 km) |
| Gretna to Murraysville (North Carolina) | 775.35 mi (1,247.81 km) |
| Gretna to Murrieta (California) | 1,609.92 mi (2,590.92 km) |
| Gretna to Murrysville (Pennsylvania) | 933.73 mi (1,502.69 km) |
| Gretna to Muscatine (Iowa) | 797.25 mi (1,283.05 km) |
| Gretna to Muscle Shoals (Alabama) | 362.50 mi (583.38 km) |
| Gretna to Muscoy (California) | 1,620.48 mi (2,607.91 km) |
| Gretna to Muskego (Wisconsin) | 902.83 mi (1,452.96 km) |
| Gretna to Muskegon (Michigan) | 943.69 mi (1,518.73 km) |
| Gretna to Muskogee (Oklahoma) | 507.05 mi (816.02 km) |
| Gretna to Mustang (Oklahoma) | 585.04 mi (941.53 km) |
| Gretna to Myers Corner (New York) | 1,210.00 mi (1,947.30 km) |
| Gretna to Myrtle Beach (South Carolina) | 705.77 mi (1,135.83 km) |
| Gretna to Myrtle Grove (Florida) | 167.88 mi (270.18 km) |
