Regarding carry-on luggage, United Airlines allows its Domestic Economy passengers to have two bags plus one personal item. The Carry-on bags must fit within the size limits not exceeding 22″ x 14″ x 9″ or 45 linear inches and a personal item not larger than 18″ x 10″ x 8″ or 36 linear inches . Checked bags, on the other hand, should not measure more than 62 linear inches and should not weigh more than 50 pounds; any checked bag exceeding the 50-pound maximum weight limit will be charged at least $100. Meanwhile, Economy Plus clients, Premier Silver, Gold, Platinum, and 1K customers, United International First and Business passengers, and patrons flying to United First or Business class are entitled to one complementary bag, and any additional bags should be bought. In terms of excess weight, bags weighing 51-70 pounds have a minimal charge of $100 per bag, while those measuring 71 pounds or more will be charged at least $200 . Over-sized bags too, necessitate a payment of at least $200 and are defined as those surpassing 115 linear inches . Lastly, every carry-on and checked bag exceeding the regular allowance of 2 and 1, respectively, domestically will cost an additional $100 each. Note that the correct airline’s policy may change, and it is recommended to check its online portal or contact the relevant authorities.