Free chicken sandwich on $10 + $4 milkshake today at Shake Shack via promo code CHICKENSUNDAY & SHAKEIT

Store

Shake Shack

Category

Restaurant Coupons

Posted

September 13, 2026 (Sep 13, 2026)

Promo code

CHICKENSUNDAY

Where to use

Online or in store, with the promo code

Cost

Free. No account needed to use a coupon.

This Shake Shack offer was posted on September 13, 2026 in Restaurant Coupons. Enter promo code CHICKENSUNDAY at checkout; if the store also honors it in person, the cashier can key it in. Offers like this usually run for a limited time, so use it soon. The newest Shake Shack coupons are listed below, and every one is also free in The Coupons App, with an alert the moment a new one arrives.