https://united-air.circle.so/c/say-hello/united-airline-how-to-cancel-a-united-flight-points-or-cash-ticket-get-official
Yes, you can cancel a flight and get a full refund from**************** by calling their customer service at 1-888*829*14*67. You will receive a full refund if you cancel within 24 hours of booking, as airlines must issue a full refund in this timeframe