Sonic Drive-In Nights: 50% off milkshakes after 8pm
This August enjoy a special deal by Sonic Drive-In: For a limited time, milkshakes are 50% off after 8 pm at Sonic Drive-In! Just visit your nearest location to redeem yours! You can also order it through the Sonic Drive-In app. Excludes combos. Valid for a limited time only. Other exclusions may apply.