FR 6921 then AT 1669 at Barcelona
Dublin → Barcelona → Tetouan
Timetable, Barcelona time
21:40FR 6921 from Dublin at the gate
18:50AT 1669 to Tetouan leaves the gate
21 h 10 apart on the timetable, overnight
AT 1669 leaves 21 h 10 after FR 6921 arrives on the timetable: more than half a day, so not a connection we count.