https://community.expensify.com/discussion/35010/can-i-cancel-a-888...
Does United have 24-hour cancellation policy? Yes, United offers a 24-hour cancellation policy. If you cancel within 24 hours of flight, you can get a full refund, provided that the departure date is more than two days away8888291467 All customers have 24 hours from the time of their original booking to cancel their reservation without being charged a cancellation fee, regardless of the fare selected,