Originally Posted by
findark
Perhaps for an oversale of the whole aircraft, but if there were space in Y, DL would have assigned some of the paid J pax to those seats and expected them to board with a smile. UA is lightyears ahead of DL in handling downgrades as a general matter.
Not sure, but looks a bit like the whole aircraft was actually over. IME, UA would have been downgrading rather than denying boarding if space in back existed.