If you and your family or friends will be taking an extended theme park vacation and flying to your destination, you may want to look into travel packages. Universal and Disney have their own vacation services and can offer a variety of plans with features such as airfare, ground transportation, hotel accommodations (even at hotels away from their properties), theme park admissions, and meals. Are they good deals? That depends.
During certain low-traffic seasons or at other times when the parks want to drum up business, these can be great values, indeed. Don't book a package that includes features you probably would not use. Even if a package is not much of a savings over purchasing the bundled items separately, the time and energy you can save with one-stop shopping may make it worth it to you.