Say cheese! There are lots of cheesy reasons for bargain hunters to smile on National Cheeseburger Day, September 18, 2025. While there are many stories regarding the birth of the cheeseburger, many believe it all started right here in Denver. Back in 1935, a trademark for the name “cheeseburger” was awarded to Louis Ballast of the Humpty Dumpty Drive-In in Denver.
Photo: Smashburger
The only true story is that everyone loves a juicy cheeseburger. Even better, when it’s with fries and a shake!
And, because of the endless possibilities of the bun, cheese, condiments and toppings, everyone can create and enjoy their own “perfect cheeseburger.”
The deals are only valid at participating locations and cannot be combined with any other discount or promotion. Limit one offer per person, while supplies last.
For most, there are no protein substitutions allowed — only beef burgers. Plus, none of the offers are available for third-party delivery.
Check back here for the latest updates.
Applebee’s
Celebrate National Cheeseburger Day at Applebee’s!
Enjoy a burger with fries for just $8.99 on National Cheeseburger Day, September 18, 2025 at Applebee’s. Choose from the Classic Burger, Classic Cheeseburger or Classic Bacon Cheeseburger.
The offer is available for dine-in, to-go or delivery orders.
Burger King
Get treated like royalty on National Cheeseburger Day at Burger King.
On September 18, 2025, the popular fast-food restaurant is offering a FREE Bacon Cheeseburger with a minimum purchase of $1. The giveaway is part of Burger King’s Perks Week celebration — from September 15 to 21, 2025.
And you can’t enjoy a burger without fries. Burger King is offering FREE any size fries every week for its loyalty members through the end of 2025. (Unfortunately, the two offers cannot be combined in the same transaction.)
Dairy Queen
While it may not be cheeseburger-related, you can still enjoy (sweet) savings at DQ on National Cheeseburger Day.
From September 8 to 21, 2025, the popular ice cream shop is offering a small Blizzard Treat for just 85¢ with any purchase of $1 or more. The offer is only available in the DQ app.
Enjoy the bargain Blizzard alongside one of DQ’s cheeseburgers!
Photo: Freddy’s Frozen Custard & Steakburgers
Freddy’s Frozen Custard & Steakburgers
Hang out with Freddy on National Cheeseburger Day!
From September 18 to 21, 2025, Freddy’s Frozen Custard & Steakburgers is offering a FREE Freddy’s Original Double Steakburger with any $10 purchase.
This meaty offer is only available through the Freddy’s app.
Image: Good Times
Good Times
Have a good time on National Cheeseburger Day!
On September 18, 2025, Good Times is celebrating the cheesy day with a regular-sized Deluxe Cheeseburger Combo for just $8.
The combo includes a Deluxe Cheeseburger, small fry and small drink.
McDonald’s
McDonald’s has been serving cheeseburgers for 85 years, so it’s the perfect place to celebrate National Cheeseburger Day.
On September 18, 2025, the fast-food giant is offering its popular Double Cheeseburger for just 50¢. Limit one per person.
The cheesy deal is only available for MyMcDonald’s Rewards members.
BONUS: Thanks to the Colorado Rockies, you can also bite into a FREE Double Cheeseburger at the Golden Arches on September 18, 2025. Get details here.
Smashburger
In honor of National Cheeseburger Day, Denver-based Smashburger is offering a cheesy deal.
On September 18, 2025, Smashburger is offering any single Smash Burger for just $4.99, including ground beef, black bean, ground chicken and turkey. (Crispy chicken and brisket are excluded from the offer.) Any add-ons or extras are additional.
Be sure to mention the offer, when ordering in-restaurant. Use promo code BURGERDAY25 for online orders via the restaurant’s site or app.
There is no limit.
Smashburger has 23 locations in Colorado.
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