In Epcot, Germany, Italy, and France have wine and I believe all 3 offer flights.
Outside of Epcot, I'm not sure about wine flights but I know many restaurants have great wine selections. CA Grill has a great California selection and Jiko has a great South African wine selection. In fact, that's a big reason we went to Jiko. Magic Kingdom is the only place you can't get beer/wine - outside of that almost any TS restaurant has a decent selection.