A carry-on checklist is important for a number of reasons. First, it helps to ensure that you have everything you need for your flight. This includes items such as your passport, boarding pass, and any medications you may need. Second, a carry-on checklist can help you stay organized during your flight. This is especially helpful if you have a lot of items with you. Finally, a carry-on checklist can help you remember any important items you may need to bring with you on your trip.