Uncover the most up to date collection of Sport Chek’s Boxing Day sales and view flyer information. RedFlagDeals is your source for Sport Chek Boxing Day sales, flyers, deals, ads, discounts and coupons. Home to a wide range of active ware to fit your every need, you can find great deals in-store and online. Find outstanding deals on select items across the entire store inventory. This 2017 Boxing Day take a look through the flyers and find what you are looking for at the best rates.