Circle K is located at 2500 E Main St, Saint Charles, IL. This business specializes in Convenience Stores and Auto Fuel & Oil. Circle K is open Mon, Open 24 hours; Tue, Open 24 hours; Wed, Open 24 hours; Thu, Open 24 hours; Fri, Open 24 hours; Sat, Open 24 hours; Sun, Open 24 hours and accepts All Major Credit Cards, American Express, Cash, Discover, Mastercard, Personal Checks and Visa.