How Much Is a Sundae at Sonic Drive-In?
A Sundae costs $3.99 at Sonic Drive-In in 2026.
Make Sonic Drive-In at Home
Eating Sonic Drive-In every week adds up. These are the sauces, mixes and kitchen tools people use to get close to the real thing for a fraction of the menu price.
How to Pay Less at Sonic Drive-In
- Happy Hour from 2:00 to 4:00 PM every day takes 50 percent off all drinks and slushes — the single biggest recurring discount in fast food.
- The Sonic app frequently offers half-price burgers on Tuesdays and free items with a purchase.
- Upgrading to a Route 44 (44 oz) for $0.60 more is the cheapest per-ounce drink on the menu, especially during Happy Hour.
- Breakfast is served all day, so the $5.29 breakfast burrito is available as a cheap dinner.
Sundae Price — FAQ
How much is a Sundae at Sonic Drive-In?
A Sundae costs $3.99 at Sonic Drive-In in 2026. That is the national average menu price, last checked August 7, 2026. Franchise owners set their own prices, so expect a little more at airport, city-centre and highway locations.
Is the Sundae cheaper at other chains?
Yes — Burger King (Sundae, $2.49) sells a comparable item for less than the $3.99 Sonic Drive-In charges.
What is cheaper than the Sundae at Sonic Drive-In?
In the same section of the menu: Ice Cream Cone ($2.29).
Why does the Sundae cost more at my Sonic Drive-In?
Most Sonic Drive-In restaurants are run by franchisees who set their own prices, so the same item can differ by a dollar or more between neighbouring towns, and airport, stadium and highway locations charge the most. App and loyalty offers are usually cheaper than the menu board.