You must be aware of all the restrictions, details, and requirements of United Airlines' cancellation policy if you wish to change your flight reservation. When compared to other airlines, United has fairly transparent cancellation and refund rules. They must follow specific procedures before rescheduling a flight that has already been scheduled. Airlines makes a few improvements to improve the utility of cancellation policies for United Airlines passengers on both domestic and international flights. Tickets purchased through United Airlines are almost always subject to change costs. If you choose the location but your plans change, United Airlines allows you to cancel your trip up to 24 hours before the start of your itinerary.