| Gretna to Miami Lakes (Florida) | 654.81 mi (1,053.81 km) |
| Gretna to Miami Shores (Florida) | 664.18 mi (1,068.89 km) |
| Gretna to Miami Springs (Florida) | 659.53 mi (1,061.41 km) |
| Gretna to Miamisburg (Ohio) | 747.09 mi (1,202.33 km) |
| Gretna to Michigan City (Indiana) | 834.34 mi (1,342.74 km) |
| Gretna to Middle Island (New York) | 1,222.22 mi (1,966.97 km) |
| Gretna to Middle River (Maryland) | 1,010.35 mi (1,625.99 km) |
| Gretna to Middle Valley (Tennessee) | 461.30 mi (742.40 km) |
| Gretna to Middleburg (Florida) | 487.78 mi (785.01 km) |
| Gretna to Middleburg Heights (Ohio) | 915.90 mi (1,473.99 km) |
| Gretna to Middlesex (New Jersey) | 1,142.71 mi (1,839.02 km) |
| Gretna to Middleton (Wisconsin) | 912.27 mi (1,468.16 km) |
| Gretna to Middletown (Connecticut) | 1,260.06 mi (2,027.87 km) |
| Gretna to Middletown (Delaware) | 1,045.19 mi (1,682.07 km) |
| Gretna to Middletown (New York) | 1,181.67 mi (1,901.72 km) |
