The United Airlines tickets is refundable and will be returned to you once your journey is completed. If you've purchased an non-refundable ticket and want to cancel your trip without receiving a reimbursement. The ticket's value will be reserved for your future trip. The money will be retained in the computer system and will not be able to be withdrawn. It can be used to cover the cost of a replacement flight. After cancelling the original flight, you must schedule a replacement flight within one calendar year. The money will be lost otherwise.