If you are canceling your tickets within 24 hours of purchase then your money will be sent back through the original mode of payment. If you have purchased non-refundable tickets then the [b]United Airlines Cancellation Fee[/b] will be deducted from the ticket fare and the rest amount will be used in the purchase of another ticket.

https://airlinespolicy.com/cancellation-policy/united-airlines-cancellation-policy/