Since the WinStar, which happens to be the largest casino in the U.S., is the far busier casino, we’ll focus more on that in this article. The WinStar is one of two casinos within 80 miles of Dallas However the larger and more popular WinStar World Resort is just about a mile up the road. It’s 79 miles up the road on Interstate 35. The closest casino to Dallas, Texas, (as measured from downtown), is the Border Casino in Thackerville, Oklahoma. There are, however three casinos within a short driving distance, and many more if you’re willing to drive further. Unfortunately for Dallas area residents and visitors wanting to play some slots, blackjack, or craps, there aren’t any casinos in Dallas.