| Gretna to Wichita (Kansas) | 680.83 mi (1,095.69 km) |
| Gretna to Wichita Falls (Texas) | 568.48 mi (914.88 km) |
| Gretna to Wickliffe (Ohio) | 939.43 mi (1,511.86 km) |
| Gretna to Wildomar (California) | 1,613.88 mi (2,597.29 km) |
| Gretna to Wildwood (Florida) | 490.68 mi (789.67 km) |
| Gretna to Wildwood (Missouri) | 600.07 mi (965.72 km) |
| Gretna to Wilkes-Barre (Pennsylvania) | 1,114.34 mi (1,793.35 km) |
| Gretna to Wilkinsburg (Pennsylvania) | 926.04 mi (1,490.31 km) |
| Gretna to Williamsburg (Virginia) | 919.62 mi (1,479.98 km) |
| Gretna to Williamsport (Pennsylvania) | 1,068.88 mi (1,720.20 km) |
| Gretna to Williamstown (New Jersey) | 1,087.19 mi (1,749.66 km) |
| Gretna to Willimantic (Connecticut) | 1,285.61 mi (2,068.98 km) |
| Gretna to Williston (North Dakota) | 1,452.81 mi (2,338.07 km) |
| Gretna to Willmar (Minnesota) | 1,085.65 mi (1,747.18 km) |
| Gretna to Willoughby (Ohio) | 943.38 mi (1,518.23 km) |
