| Gretna to Port Chester (New York) | 1,195.48 mi (1,923.94 km) |
| Gretna to Port Hueneme (California) | 1,726.52 mi (2,778.57 km) |
| Gretna to Port Huron (Michigan) | 996.31 mi (1,603.40 km) |
| Gretna to Port Lavaca (Texas) | 406.25 mi (653.80 km) |
| Gretna to Port Neches (Texas) | 233.19 mi (375.29 km) |
| Gretna to Port Orange (Florida) | 546.12 mi (878.89 km) |
| Gretna to Port Orchard (Washington) | 2,113.23 mi (3,400.92 km) |
| Gretna to Port Royal (South Carolina) | 577.90 mi (930.03 km) |
| Gretna to Port Salerno (Florida) | 628.13 mi (1,010.87 km) |
| Gretna to Port St. John (Florida) | 565.97 mi (910.84 km) |
| Gretna to Port St. Lucie (Florida) | 613.50 mi (987.34 km) |
| Gretna to Port Washington (New York) | 1,188.14 mi (1,912.13 km) |
| Gretna to Port Washington (Wisconsin) | 938.61 mi (1,510.55 km) |
| Gretna to Port Wentworth (Georgia) | 547.06 mi (880.40 km) |
| Gretna to Portage (Indiana) | 822.47 mi (1,323.65 km) |
