| Gretna to Myrtle Grove (North Carolina) | 769.32 mi (1,238.10 km) |
| Gretna to Nacogdoches (Texas) | 297.42 mi (478.66 km) |
| Gretna to Nampa (Idaho) | 1,733.70 mi (2,790.13 km) |
| Gretna to Nanakuli (Hawaii) | 4,222.93 mi (6,796.16 km) |
| Gretna to Nanticoke (Pennsylvania) | 1,107.34 mi (1,782.09 km) |
| Gretna to Nanuet (New York) | 1,184.29 mi (1,905.93 km) |
| Gretna to Napa (California) | 1,922.67 mi (3,094.23 km) |
| Gretna to Naperville (Illinois) | 824.65 mi (1,327.15 km) |
| Gretna to Naples (Florida) | 566.45 mi (911.61 km) |
| Gretna to Naranja (Florida) | 662.26 mi (1,065.81 km) |
| Gretna to Nashua (New Hampshire) | 1,356.19 mi (2,182.57 km) |
| Gretna to Nashville (Tennessee) | 472.11 mi (759.79 km) |
| Gretna to Natchez (Mississippi) | 137.94 mi (221.99 km) |
| Gretna to Natchitoches (Louisiana) | 220.22 mi (354.40 km) |
| Gretna to National City (California) | 1,603.93 mi (2,581.27 km) |
