HOW LONG IS LEFTOVER TURKEY GOOD FOR? Leftover turkey will keep for 3-4 days in the refrigerator, or 2-3 months in the freezer. If we have a lot of leftovers, I like to freeze the turkey and use it for recipes later in the month. WHAT CAN I SERVE WITH LEFTOVER TURKEY CASSEROLE? Serve leftover turkey casserole with Easy Cranberry Sauce for the