According to United Airlines, customers who book tickets but decide they don't want to travel within 24 hours may be able to get a refund. The business said the refund request is valid for tickets purchased for travel on United and United Express flights. According to United, the refund will be provided as a credit to the passenger's account and will include the full cost of the ticket including taxes and fees: +1-866-901-7017. Read Cancel United Flights Within 24 Hours Below.