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Get a new Garlic Butter Bacon Burger for half price with a Sonic app coupon good today through October 31, 2019.
Open the Sonic app and click on My Rewards to find this deal: 1/2 Price Garlic Butter Bacon Burger. One-time only.
Click on Redeem to get the half-price special. Regular price for the Garlic Butter Bacon Burger is about $4.79.