Originally Posted by
joejones
* Full Y (Y class) is very expensive, freely refundable and changeable, valid for stays of up to a year, and books into premium economy on a space-available basis (but doesn't confirm it IIRC).
AFAIR Y confirms into Premium Economy as long as seats are available and you reserve one of these seats. After all seats are gone you will get a regular economy seat whereas E inventory will only be open as long as Premium Economy seats are available and is only bookable with a seat reservation.
Dave