Originally Posted by
no_idea
Now only from booking class Y and B.
Terms and conditions- Upgrades can be issued for paid tickets with their reservations confirmed up to 24 hours before scheduled departure.
- The Star Alliance upgrade award is only valid for certain ticket fare classes.
- On Turkish Airlines flights, only Y and B fare classes in Economy Class can upgrade to Business Class.
TK upgrades should not be confused with *A upgrades.
The T&C that you shared it for the *A upgrade. ( Open to all *A frequent traveler programs )
TK upgrades online could be done for all revenue booking classes, depending on availability ( could be different than those available for Y and B fare classes ). If there is availability, when logging to MMB, you would see the upgrade offer popping up.