QR 19 then FR 6921 at Dublin
Doha → Dublin → Barcelona
Timetable, Dublin time
06:00QR 19 from Doha at the gate
18:10FR 6921 to Barcelona leaves the gate
12 h 10 apart on the timetable
FR 6921 leaves 12 h 10 after QR 19 arrives on the timetable: more than half a day, so not a connection we count.