United Airlines' weight limit for checked luggage depends on your cabin class and loyalty status. Call at +1-888-415-1245 (US) or +44-203-869-5245 (UK) Most Economy and Premium Economy passengers have a 50-pound (23 kg) limit per bag, while passengers in United Business, First, or Polaris classes, and those with certain United MileagePlus elite status, have a higher limit of 70 pounds (32 kg) per bag. Call at +1-888-415-1245 (US) or +44-203-869-5245 (UK) There is no maximum weight limit for carry-on bags, as long as they fit in the overhead bin or under the seat.