| Gretna to Norton Shores (Michigan) | 939.32 mi (1,511.70 km) |
| Gretna to Norwalk (California) | 1,661.84 mi (2,674.48 km) |
| Gretna to Norwalk (Connecticut) | 1,210.34 mi (1,947.85 km) |
| Gretna to Norwalk (Iowa) | 825.49 mi (1,328.50 km) |
| Gretna to Norwalk (Ohio) | 886.95 mi (1,427.40 km) |
| Gretna to Norwich (Connecticut) | 1,284.56 mi (2,067.29 km) |
| Gretna to Norwood (Ohio) | 713.77 mi (1,148.69 km) |
| Gretna to Novato (California) | 1,934.63 mi (3,113.49 km) |
| Gretna to Novi (Michigan) | 941.57 mi (1,515.31 km) |
| Gretna to O'Fallon (Illinois) | 600.28 mi (966.07 km) |
| Gretna to O'Fallon (Missouri) | 614.37 mi (988.73 km) |
| Gretna to Oak Creek (Wisconsin) | 904.01 mi (1,454.87 km) |
| Gretna to Oak Forest (Illinois) | 818.19 mi (1,316.75 km) |
| Gretna to Oak Grove (Oregon) | 2,058.41 mi (3,312.68 km) |
| Gretna to Oak Grove (South Carolina) | 592.59 mi (953.69 km) |
