EW 9440 then QR 3669 at Barcelona
Düsseldorf → Barcelona → Nice
Timetable, Barcelona time
08:35EW 9440 from Düsseldorf at the gate
21:20QR 3669 to Nice leaves the gate
12 h 45 apart on the timetable
QR 3669 leaves 12 h 45 after EW 9440 arrives on the timetable: more than half a day, so not a connection we count.