Sonic May 2026 Deals: Half-Priced Shakes & Free Smashers
50% OffLooking for a sweet summer treat without emptying your wallet? Sonic is offering half-price classic shakes for two full weeks this May, plus massive discounts on burgers and snacks.
If you needed an excuse for a Sonic dessert run, this is it. From May 18–31, 2026, Sonic is offering half-priced Small Classic Shakes all day, every day- including Chocolate, Vanilla, and Strawberry flavors. And unlike regular Happy Hour deals, you can grab one anytime, whether it’s for a midday treat or a late-night snack. Check out our guide to 100 food deals and freebies this May for even more ways to save.
The Complete Sonic May Deal Lineup
Shakes aren't the only way to save at the drive-in this month. Sonic has dropped a massive lineup of app rewards that run through the end of May:
| Offer | Requirements | Active Dates |
|---|---|---|
| Half-Priced Small Classic Shakes | No minimum purchase required | May 18 – May 31 |
| Free SONIC Smasher™ or All-American Smasher | Valid with any $5 purchase | May 4 – May 31 |
| Free Medium Drink (Includes Sonic Refreshers) | Valid with any $3 purchase | May 4 – May 31 |
| $2 Snacks (Pretzels, Chicken Bites, Corn Dogs) | App exclusive discount | May 25 – May 31 |
| $0 Delivery Fee | $10+ app order; use code DELIVERY | Through May 31 |
How to Claim Your Sonic Discounts
- Get the App: Download the official Sonic Drive-In App to unlock these location-specific digital rewards.
- Order Automatically: For the half-priced shakes, the discount will apply directly to your cart when ordering a Small Classic Shake online or in the app.
- Use Promo Codes: To get $0 delivery on orders of $10 or more, manually type in the promo code DELIVERY at the checkout screen.
- Hit the Order Minimums: For the free burgers or drinks, make sure your cart hits the required $3 or $5 threshold before adding your freebie.
Fine Print & Pro Tips
- Stack the Savings: Place multiple separate orders in the app if you want to use more than one promo at a time!
- Flavor Check: The shake deal applies strictly to Small Classic Shakes. Specialty flavors or fancy add-ins will likely cost extra.
- Double Check Hours: Sonic is open late, making this the perfect late-night snack run.
Want more fast food freebies and secret Sonic hacks delivered to your pocket? Download the DealSeek App Now!
