January 30, 2012 No Comments FREE Onion Rings at Burger King Stop by your local Burger King on Feb 4-5 to score FREE Value Sized Onion Rings. While supplies last. Not valid during breakfast hours. We’ll post a reminder for this. FREE Onion Rings at Burger King -EXPIRED Facebook Twitter Add Comment Notify me of follow-up comments by email. Notify me of new posts by email.