Originally Posted by
MayorMcKnife
I always have expert mode turned on and see Y/B availability but can't get them even when I select refundable economy. I don't know how to force them.
That's because you don't have to have a Y/B fare to have a refundable fare - there are plenty of refundable fares below B.
To force Y/B, under the upgrade drop-down, select "Miles - Y/B" ... that should force it.