2026 National Burger Festival Discount Guide: Shake Shack & Multi-Brand Limited-Time Offers
The 2026 Burger Festival is set for this Thursday, May 28th. Calling all burger lovers!
▫️ Shake Shack: From May 25th to 31st, get a free signature ShackBurger with a purchase of $10 or more. Order through the app or website and enter promo code FREEBURGER.
▫️ Burger King: Get a free burger with a purchase of $3 or more via the app or website. This offer is available in-restaurant only.
▫️ Jack in the Box: On May 28th, get a free Jr. Jumbo Jack burger with a $1+ purchase through the app.
▫️ Bobby’s Burgers By Bobby Flay: Throughout May Burger Month, enjoy phased deals. Details below:
| Time Period | Deal Details |
| May 18–24 | $9 Palace Classic burger with fries |
| May 28th Only | $5.28 Crunchburger |
| All May | Members can enter to win a year of free burgers (12 total) |
🍔 Other Chain Brand Deals
▫️ Checkers & Rally’s: May 27th–28th, buy one Classic Burger, get one free (BOGO).
▫️ Wayback Burgers: On May 28th, get a $5 classic burger. Limit 2 per order or per membership account.
▫️ White Castle: Offers multiple limited-time discounts, some requiring codes.
| Offer | Details & Promo Code |
| Crave Clutch (20 Sliders) | $3 off with code CLUTCHDEAL |
| Any Combo Meal | $1 off with code WC1OFF |
| 10-Sack Original Sliders | Special price $8.99 (app or in-store only) |
▫️ Dairy Queen: May 25th–31st, members save $1 on a Signature Stackburger.
▫️ Krystal: On May 28th, members can get Krystals burgers for $0.50 each (up to 5) via the app.
▫️ Sonic: Through May 31st, members get a free burger with a $5+ purchase.
▫️ The Greene Turtle: On May 28th, buy one classic burger, get one free.
▫️ Farmer Boys: On May 28th, members can get a Big Cheese Cheeseburger for $3.99.
🍔 Regional & Restaurant-Specific Events
▫️ Universal Joint: On May 28th all day, members get a free Smash Burger. This offer applies to all Southeast locations with no purchase necessary.
▫️ Eddie Merlot’s & Sullivan’s Steakhouse: Order online or dine-in during happy hour for a $15 burger and fries combo.
▫️ Wahlburgers: On May 28th, a special giveaway will be held. The winner will have lunch with Chef Paul Wahlberg at a designated location (MA locations only).
