Study Finds Burger King to Be America's Fastest Drive-Thru Chain According to a 'QSR Magazine' study, it typically takes three minutes and<br />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<br />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<br />5 minutes.
