Join Date: Nov 2018
Location: Istanbul, Turkey
Programs: TK Elite Plus,BAEC GGL,ITA Executive, AFKL Gold,QR Gold,HH Diamond,Bonvoy Gold,ALL Gold
Posts: 14,186
If 'A' fare class is available and if you would pay for your trip, I would buy it now for the flight that best fitted my schedule.
If 'A' fare is not available and you were intending to pay the 'F' fare ( highest First Class fare ), I would wait until the Summer 2020 schedule is confirmed ( probably until December ). Maybe you would have luck flying with the new A350s.