Originally Posted by
Often1
Credit card dispute won't work and can hurt downstream. What US did is poor CS, but it's not wrong under the t&c. They are entitled to collect the fare difference and you could have cancelled at the airport and not flown. In a chargeback, you will lose. Put simply, poor CS doesn't translate into a legal right to a refund of the $108.
I agree with your logic as written. However, I think the OP would have more of an argument if he contested the earlier $150 change fee -- US charged him to change his flight, and then did not change it. Hence, the service he paid for (change of flight) was not delivered.
That being said, US' response sounds like a form response -- I would be very surprised if this was not corrected in response to the second email.