White Castle is rolling out a lineup of limited-time deals for May and June 2026, with a focus on value pricing across sliders, combos, and sides.
The main deal is a 10-sack of Original Sliders for $8.99, available at participating locations through June 13 for Craver Nation Rewards members.
The promotion is part of a broader set of offers tied to seasonal events and holidays, including National Hamburger Month in May.
Key offers with dates
- May 1 - 31: $25 gift card for $19.21 (in-store only)
- May 8 - 10: 20% off any order with code WCMOM (Mother’s Day weekend)
- May 9 - 11: Buy One Get One free combo (Mother’s Day offer, Rewards members, in-store)
- May 15: Free Original Slider with code SLIDERDAY for National Slider Day
- May 23 - 25: 20% off mobile orders (Memorial Day weekend)
- June 1 - 30: $3 off 10-piece mozzarella sticks (mobile app)
- June 20 - 22: Buy One Get One free combo (Father’s Day offer, in-store)
- June 21 - 23: Free small soft drink for first day of summer (mobile)
- June 25 - 29: Buy 2 Original Sliders, get 2 free for National Onion Day (limit two free)
Alongside the slider deals, White Castle is also offering smaller-time menu specials like discounted Chicken Fajita Sliders and jalapeño sides through mid-June.
Most offers require the White Castle app or Rewards membership, with some needing promo codes and others automatically applied in store. Availability varies by location.