Originally Posted by
ISTFlyer
My suggestion would be that if the later flight to Budapest has saver award space, call United MileagePlus and ask for a change which they should be able to process in a couple of minutes.
You mean on arrival in IST? (the OP has already stated US can't give them that flight at this time) If so, not it's not going to work - United don't allow changes of partner award flights within 24 hours of departure. Even if they did, you'd need to get TK to un-check you in for the connecting flight, which given TK will likely be painful...