List of Sonic Stores in Gladstone, MO Outlet Note Regular Brands Sonic Missouri Gladstone Rating 4.5 based on 91 votes Official Website https://www.sonicdrivein.com/ Products Snacks Ice Cream Drinks Chicken Hot Dogs Burgers NameAddressPhone Name/Address/Phone Sonic outlet - Gladstone 7112 N Oak Trfy (816) 436-1024 People Also Viewed