ftee

Hi all. I’m flying GVA-AMS-SFO on May 12th. I’ve been trying to upgrade my AMS-SFO Eco (L fare) flight to J via the website very often on but it always says all eligible seats are taken. Setting up an alert on ExpertFlyer for O didn’t bring any positive either. Tried calling FB hotline, they say the upgrade would eventually be possible and cost 25k miles but confirm there is no availability but I should keep trying.

We’re 6 days from take off and I need your advice: what do you think my chances are of having availability via the platform before take off ? Or at check in ? Or even after boarding ? I have no elite status. I’m mostly asking this because I need to transfer my miles from Amex to FB before departing but want to avoid if my chances are close to zero.

Thanks a lot for your help.