| Gretna to Kenosha (Wisconsin) | 884.10 mi (1,422.83 km) |
| Gretna to Kent (Ohio) | 916.35 mi (1,474.72 km) |
| Gretna to Kent (Washington) | 2,090.52 mi (3,364.36 km) |
| Gretna to Kentwood (Michigan) | 929.78 mi (1,496.33 km) |
| Gretna to Kerman (California) | 1,787.43 mi (2,876.59 km) |
| Gretna to Kernersville (North Carolina) | 718.21 mi (1,155.85 km) |
| Gretna to Kerrville (Texas) | 543.41 mi (874.54 km) |
| Gretna to Kettering (Maryland) | 976.17 mi (1,571.00 km) |
| Gretna to Kettering (Ohio) | 754.02 mi (1,213.48 km) |
| Gretna to Kewanee (Illinois) | 782.84 mi (1,259.87 km) |
| Gretna to Key Biscayne (Florida) | 670.51 mi (1,079.08 km) |
| Gretna to Key Largo (Florida) | 676.60 mi (1,088.89 km) |
| Gretna to Key West (Florida) | 627.98 mi (1,010.64 km) |
| Gretna to Keystone (Florida) | 466.58 mi (750.89 km) |
| Gretna to Kihei (Hawaii) | 4,139.42 mi (6,661.75 km) |
