Part of the convenience of checking your bag is not having to lug it around the airport, but remember that you'll still need to transport your bag from the luggage carousel to your hotel or other destination after your flight lands. With this in mind, you'll still want to choose a checked bag that can be easily maneuvered. Typically, this means opting for a suitcase or duffel bag that has at least two wheels (and preferably four wheels for added control and convenience). In our experience wheels make the best luggage!