| Gretna to Marietta (Georgia) | 426.95 mi (687.11 km) |
| Gretna to Marietta (Ohio) | 818.38 mi (1,317.06 km) |
| Gretna to Marina (California) | 1,882.29 mi (3,029.25 km) |
| Gretna to Marinette (Wisconsin) | 1,056.84 mi (1,700.81 km) |
| Gretna to Marion (Arkansas) | 365.85 mi (588.78 km) |
| Gretna to Marion (Illinois) | 544.34 mi (876.03 km) |
| Gretna to Marion (Indiana) | 775.48 mi (1,248.02 km) |
| Gretna to Marion (Iowa) | 842.78 mi (1,356.32 km) |
| Gretna to Marion (Ohio) | 834.81 mi (1,343.50 km) |
| Gretna to Marion Oaks (Florida) | 476.70 mi (767.18 km) |
| Gretna to Markham (Illinois) | 818.38 mi (1,317.05 km) |
| Gretna to Marlborough (Massachusetts) | 1,338.25 mi (2,153.71 km) |
| Gretna to Marlton (New Jersey) | 1,097.63 mi (1,766.46 km) |
| Gretna to Marquette (Michigan) | 1,158.03 mi (1,863.67 km) |
| Gretna to Marrero (Louisiana) | 3.99 mi (6.42 km) |
