Hi folks. Currently booked transatlantic in an X award economy fare. I then have an onward connecting flight to Scandinavia also in X.

I see there are plenty of business class seats / business class awards on the transatlantic flight. But not on my connecting flight. So it isn't letting me change the award flight to upgrade just the transatlantic portion.

I see I can bid for an upgrade, but it is only to premium economy. There is no option on the web to buy up to business.

In your experience, is a buy up to Business from X economy possible? Even at the gate? or not?