Hi, I was able to get an S class ticket on Turkish Airways from Istanbul to NYC and confirmed on ExpertFlyer there are still 4 business class upgrades available (J) on that flight.

However, when I try to use United’s Star Alliance upgrade interface it tells me no upgrades are available. I’ve tried calling United which keeps directing me to their website and to Turkish. Turkish has confirmed the upgrade availability is there. Any idea how I can secure these seats?

Thank you

ps: when I use ITA Matrix using F bc=J it shows nothing available. I’ve never used it before so not sure I’m doing it right... ExpertFlyer and Turkish are telling me the upgrades are there...