https://community.expensify.com/discussion/63368/faqs-1-888-829-146...
Yes, United also have cancellation policy, specially for 24 hour ticket cancellations. United Allows its passenger to cancel a flight for free before 24 hours of flight departure. United Airlines' cancellation policy allows passengers to cancel their flights within 24 hours of booking for a full refund, provided the flight is booked at least seven days before departure. Beyond the 24-hour window, cancellation fees may apply depending on the fare type. Basic Economy tickets are non-refundable.