Originally Posted by
pcoll
I am also thinking equipment swap or upgrade offered at online check in.
But, wouldn't you have been offered the paid upgrade at check in, if one was available?
I have not seen offer to upgrade for quite awhile during check in.
I believe the check-in upgrade offer requires U to be open (and maybe some other conditions). If U was opened after the OP checked in, then it wouldn't have offered to them.