Sonic: Half-priced Cheeseburgers Tuesday’s after 5 PM December 6, 2022 December 20, 2022 What’s better than a Sonic Cheeseburger? As many Sonic Cheeseburgers as you like for half-price! For a limited time, you can get just that every Tuesday after 5 PM when you order online or through the Sonic app (iOS | Android). Get the details on the Sonic website.