Gretna is located in United States (Sarpy County, Nebraska) and time zone America/Chicago.
Places nearby are Chalco, Papillion and Elkhorn.
Chicago is 692 km away, Houston is 1,253 km away and New York City is 1,779 km away as the crow flies.
Distances from Gretna to the most important cities in United States and the world.
41.1408300°
-96.2397400°
Human settlement in Scotland
https://en.wikipedia.org/wiki/Gretna,_Dumfries_and_Galloway