QR 3721 then TK 1856 at Barcelona
Granada → Barcelona → Istanbul
Timetable, Barcelona time
22:50QR 3721 from Granada at the gate
18:30TK 1856 to Istanbul leaves the gate
19 h 40 apart on the timetable, overnight
TK 1856 leaves 19 h 40 after QR 3721 arrives on the timetable: more than half a day, so not a connection we count.