Half-Price Starbucks Frapps May 4-13 Expired May 012012 Participating Starbucks shops are featuring a promotion for Frappuccinos. The Frappuccino blended beverages are available for half price 3 p.m. to 5 p.m. May 4 to 13. It’s Frappuccino Happy Hour. If you're new here, you may want to subscribe to our free daily newsletter. Thanks for visiting! Sorry, the comment form is closed at this time.