I read on the United Airlines 24-hour refund policy (mirror):
- Under our 24-hour flexible booking policy, if your ticket was purchased through United in the last 24 hours and you completed your purchase one week or more before the original scheduled departure flight, it may qualify for waiver of change or cancellation fees.
- Basic Economy tickets are not eligible for changes, but are eligible for a full refund inside 24 hours of booking as long as you completed your purchase one week or more before the original scheduled departure flight.
Basic Economy tickets are clearly fully refundable within 24 hours of booking. Are other ticket types also fully refundable within 24 hours of booking?
The quote above says "it may qualify for waiver of change or cancellation fees.", which indicates neither the certainty nor the entirety of the refund.
Assume that the flight ticket purchase is made one week or more before the original scheduled departure flight.