One complimentary carry-on bag (measuring 22 x 14 x 9 inches) and one personal item (9 x 10 x 17 inches) are permitted under United Airlines Baggage Policy. Routes and price classes have different checked baggage fees. Usually, the first checked bag is $35 and the second is $45. The bags ought to be less than 62 linear inches and weigh less than fifty pounds. There are extra charges for big and overweight luggage.