| Gretna to Madison (New Jersey) | 1,153.69 mi (1,856.68 km) |
| Gretna to Madison (Wisconsin) | 910.83 mi (1,465.84 km) |
| Gretna to Madison Heights (Michigan) | 951.82 mi (1,531.81 km) |
| Gretna to Madison Heights (Virginia) | 815.88 mi (1,313.04 km) |
| Gretna to Madisonville (Kentucky) | 533.87 mi (859.18 km) |
| Gretna to Magalia (California) | 1,903.36 mi (3,063.16 km) |
| Gretna to Magna (Utah) | 1,448.09 mi (2,330.47 km) |
| Gretna to Magnolia (Arkansas) | 298.35 mi (480.16 km) |
| Gretna to Maili (Hawaii) | 4,223.79 mi (6,797.53 km) |
| Gretna to Maitland (Florida) | 530.43 mi (853.65 km) |
| Gretna to Makakilo (Hawaii) | 4,220.02 mi (6,791.47 km) |
| Gretna to Malden (Massachusetts) | 1,362.15 mi (2,192.17 km) |
| Gretna to Malibu (California) | 1,702.27 mi (2,739.53 km) |
| Gretna to Maltby (Washington) | 2,097.58 mi (3,375.72 km) |
| Gretna to Malvern (Arkansas) | 348.30 mi (560.54 km) |
