We've all had those days when we're so overscheduled that there's little time to sit and wait for what feels like forever for our food. Get our free mobile appWingstop has the slowest drive-thru of the fast food chains in America, according to a new study, but on the flip side, there's one fast food chain that tops the list of the quickest drive-thru line. The study polled fast food customers in 40 states to determine the fast food chains with the quickest drive-thrus. Photo by Jeremy Bishop on Unsplash Photo by Jeremy Bishop on Unsplash loading...Study Reveals America’s Fastest Drive-Thru Chain Is Chick-fil-AChick-fil-A came in on top for its fast drive-thru speed and service, according to nearly 61% of regulars. Even with longer drive-thru lines, the service per car is the fastest.