Say cheese! Friday, September 18, 2026 is National Cheeseburger Day and bargain hunters will have much to smile about at Smashburger. In celebration of the cheesy day, the popular burger chain is offering a special one-day-only deal for cheeseburger lovers. (And who doesn’t love cheeseburgers?) Add the restaurant’s popular Smashfries and you’ve got the perfect combo to celebrate the day.
Photo: Smashburger
$1 National Cheeseburger Day Special
On Friday, September 18, 2026, Smashburger is offering Any Single Smashburger for just $1 at participating locations.
Choose from the restaurant’s Classic Smashburgers to Signature Builds. Any add-ons cost extra.
The deal is only available for SmashRewards members. Join SmashRewards here.
Limit one offer per person.
The cheesy savings are available in-restaurant, as well as via Smashburger’s site or app.
There are 21 locations in Colorado.
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