• Wendy's: Order via the website or mobile application to receive a Jr. Bacon Cheeseburger for just one penny. The deal is still available as of September 22.

• McDonald's: A double cheeseburger costs 50 cents on September 18. To receive the discount, make sure to order through the app.

• Burger King: Does "free" sound good? Members of the Royal Perks rewards program will receive a free cheeseburger worth $1 or more on National Cheeseburger Day. It begins a full week of benefits for members.

• Dairy Queen: There are lots of promotions going on right now. On September 18, one Original Cheeseburger will be given away for free when you spend $1 or more on any menu item. Ensure that the exclusive offer is available in the app.

• Shake Shack: Take advantage of this lunchtime promotion. On September 18 between 11 a.m. and 2 p.m., place a DoorDash order and use the promo code "SHACK" to receive a free cheeseburger (taxes and fees may apply). accessible at locations that participate.

• White Castle: From September 18 through 20, get single cheese sliders BOGO. One BOGO promotion is allowed per customer.

• Krystal: Place an order through the app and receive $5 worth of $1 Cheese Krystals.

• Freddy's Frozen Custard & Steakburgers: At select locations, place an app order and receive a free Freddy's Original Double.

• Applebee's: Get a classic cheeseburger, classic burger, or classic bacon cheeseburger and fries for $8.99 when you order it as a meal.