Originally Posted by
MBS MillionMiler
...
Go to 'advanced search'. In the fare preferences heading, just below the boxes for fare class and type of fare, is a box that says "Fare class" and in that box is "examples, Y, B, M"... ....
That only allows selecting a fare class but, for example, there are two T fare basis, it will use the lower T fare. The OP wants to select the higher T fare.
Originally Posted by
MBS MillionMiler
...
Side note, the other site you listed, as far as I know, it's FAA law that all flights are refundable within 24 hours of purchase (unless the flight itself is departing within 24 hours).
Only if purchased from the airlines, not OTAs
And the exempt is 7 days in advance (but UA.com does not make use of the exemption)