[Expired] White Castle: 1 Free Slider (5/15)

Deal has ended, view more White Castle deals by clicking here. 

Update 5/15/26: Back again with promo code SLIDERDAY. Valid 5/15 only, must be rewards member. 

Update 5/15/23: Available again.

The Offer

• White Castle is offering one free slider on 5/15 for national slider day

Our Verdict

In previous years they have offered free drinks as well, doesn’t seem to be the case this year.