Study Finds Burger King to Be America's Fastest Drive-Thru Chain According to a 'QSR Magazine' study, it typically takes three minutes and
13 seconds fully complete orders. Following BK in speed was Dunkin in second and Wendy’s in third. Although the burger joint is the fastest to complete orders, it's not the top-selling
fast food chain. McDonald’s and Chick-fil-A are the two top-selling chains but are the two slowest. Every drive-thru in the study got food to the customer in under
5 minutes.