FR 6921 then W6 4406 at Barcelona
Dublin → Barcelona → Sofia
Timetable, Barcelona time
21:40FR 6921 from Dublin at the gate
19:30W6 4406 to Sofia leaves the gate
21 h 50 apart on the timetable, overnight
W6 4406 leaves 21 h 50 after FR 6921 arrives on the timetable: more than half a day, so not a connection we count.