Originally Posted by
Jaenks
D is a higher booking class, so you are out of luck. It must be I class availability to upgrade or use miles as award.
I haven't seen any Business class promotion award tickets on Turkish Airlines. Full mileage business class award seats are available. I can see Economy award promotion seats.
I see only 2 Business class seats being booked on IST to USA segment. All other business class seats are empty. I guess TA is not releasing J class or business class award promotion tickets.
Only other option is to try at airport but I guess mid June will be peak travel season from Asia and Europe to to/from USA and will be nearly impossible to have 3 business class upgrades available at airport on departure with miles.