Originally Posted by
ratechaser
Be interested to see if there's any EU261 angle here. Yes it might be an op-up, but is there some threshold point where once you're in your seat, being moved could constitute an involuntary downgrade?
definitely not. if a pax paid for Y and ends up flying Y, there's no compensation even if they were upgraded and downgraded in the meantime. they never bought / were entitled to a seat in a different cabin so there's no downgrade compensation due.