Starbucks: Buy One Get One Free (exp. 9/21) September 17, 2014 By: Tricie share Starting today 9/17 at Starbucks Buy any fall drink (hot or iced)—get one FREE. Promotion valid from 2 PM -6 PM thru 9/21 at participating US stores. Just in time, I need a Sbux fix!!! See More FREEBIE Deals HERE! Please be advised that this post may contain affiliate links. See my Disclosure Policy for details.