UNITED STATES — September 17, 2026 — Beyond the highly searched Five Guys BOGO offer, several other major chains are celebrating National Cheeseburger Day 2026 (Friday, September 18) with freebies and discounted burgers.
Here is a clear roundup of the verified deals from Whataburger, Shake Shack, Burger King, Smashburger and others.
Whataburger
Rewards members can get a free Bacon & Cheese Whataburger Jr. when they buy medium fries or onion rings on September 18. Customers who redeem the offer are automatically entered into a giveaway for free Whataburger for a year.
Shake Shack
Use code BURGERDAY on September 18 in the Shake Shack app, website or restaurants to get a ShackBurger or Cheeseburger for $5 with any purchase.
Burger King
Royal Perks members can claim a free Bacon Cheeseburger with a $3 minimum purchase on September 18. This is part of a full “Perks Week” running September 14–20 with different daily free items.
Smashburger
Loyalty members can order any single Smash Burger for just $1 on September 18 at participating locations (in-restaurant, app to-go or first-party delivery).
Other Deals Worth Knowing
- Applebee’s: Classic Burger or Classic Cheeseburger + fries for $8.99 on September 18
- Wahlburgers: 50% off Our Burger or Our Burger Smash on September 17
- Carl’s Jr.: Half-price burgers with the purchase of a Hand-Scooped Ice-Cream Shake (Sept 17–18 for rewards members)
In-N-Out has not announced a national promotion for the day, though local locations may run their own specials.
Always verify the offer in the official restaurant app and confirm participation at your local store, as availability can vary.
Shivam Das News will continue updating this list as additional deals are confirmed for National Cheeseburger Day 2026.
