| Gretna to New Britain (Connecticut) | 1,259.47 mi (2,026.92 km) |
| Gretna to New Brunswick (New Jersey) | 1,141.65 mi (1,837.31 km) |
| Gretna to New Carrollton (Maryland) | 975.40 mi (1,569.75 km) |
| Gretna to New Cassel (New York) | 1,190.40 mi (1,915.76 km) |
| Gretna to New Castle (Indiana) | 740.37 mi (1,191.52 km) |
| Gretna to New Castle (Pennsylvania) | 939.40 mi (1,511.81 km) |
| Gretna to New City (New York) | 1,187.67 mi (1,911.38 km) |
| Gretna to New Franklin (Ohio) | 898.58 mi (1,446.12 km) |
| Gretna to New Haven (Connecticut) | 1,239.34 mi (1,994.53 km) |
| Gretna to New Haven (Indiana) | 820.88 mi (1,321.08 km) |
| Gretna to New Hope (Minnesota) | 1,060.83 mi (1,707.24 km) |
| Gretna to New Hyde Park (New York) | 1,184.07 mi (1,905.58 km) |
| Gretna to New Iberia (Louisiana) | 106.08 mi (170.72 km) |
| Gretna to New Kensington (Pennsylvania) | 936.82 mi (1,507.67 km) |
| Gretna to New Kingman-Butler (Arizona) | 1,438.97 mi (2,315.80 km) |
