Whether you get a free carry-on with United Economy in 2026 depends entirely on your specific fare class and destination. If you book a standard United Economy ticket for a domestic or international flight, you are permitted one personal item that fits under the seat and one standard carry-on bag for the overhead bin at no extra charge. However, if you book a Basic Economy ticket, the rules are much stricter: you are only allowed one small personal item, and a full-sized carry-on bag is not permitted unless you are traveling on certain international routes or hold qualifying MileagePlus Premier status. If a Basic Economy passenger brings a carry-on bag to the gate, they will be required to check it and pay the applicable checked bag fee plus a $25 gate handling charge. It is vital to check your confirmation email to see if you have "N" class (Basic Economy) or a higher tier, as this distinction is the primary cause of unexpected fees at the airport for travelers who assume all "Economy" tickets are created equal.