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
Yes, you could.
Even if you are connecting within separate tickets, TK also allows through checking baggage on separate tickets so you could also ask them to check through your baggage to Barcelona, at your first point of departure.