Originally Posted by
sbm12
That would be quite surprising as lately rebookings into Y which are then upgraded have a habit of posting as the original fare class, not Y/B. If the ticket is not upgraded then the bonus miles are more common.
The few times it happened to me in the past, i've had it post as 125% (or 150% as it was before). I wouldn't count on it happening though like you state ... and had a few times where it wouldn't post at all (it ended up posting as the original fare class when I did land in that situation).