Hi,
Is there a list of TK booking classes that are upgradeable using normal Star Alliance upgrade awards (in my case, from Aegean)? the one I have found seems to only apply to Miles&Smiles:
http://www.turkishairlines.com/en-in...awards/upgrade
It seems the T class is upgradeable, but when we try to upgrade a flight, it returns:
523 Eligibility failure - class not eligible