Discover United Airlines Baggage Policy is very simple and allows for varied needs of travel. The majority of fares include a personal item and carry-on; however, Basic Economy does not include these unless purchased separately. Fees for checked bags are dependent upon the route and class of ticket, with premium cabin passengers and MileagePlus members having extra allowances. It is easy to plan with the detailed policy, but fees for overweight or oversized luggage add up quickly. Overall, it is practical and needs improvement to make it cost efficient.