Originally Posted by
ermen
will there be a price difference between participating in the upgrade offer or buying a last minute upgrade at the lounge?
Huge difference! And certainly a lot more pricier at the lounge athough you are of course buying certainty.
But the price differential is so big, I wouldnt even consider it. In fact, promo business class fares could be cheaper than the combined all in costs that you would have paid with the lounge upgrade.