United Airlines Cancellation Fee is reasonable and inferior to many Airlines’ cancellation prices which charge a hefty amount of money for mere cancellation or rescheduling of flights. Also no fee is charged extra if a traveler wants to cancel a ticket via call with customer care phone number provided by the Airlines. This facility is available round the clock. The free cancellation service offered by United Airlines is only available for cancellations made prior to 24 hours after booking. The airline's penalty determines the cancellation request. The United Airlines cancellation fee may vary according to the excursion type, lodging class, and applicable passage restriction. Economic appointments are non-transferable and non-returnable after 24 hours of purchase.