BT 877 then FR 6874 at Barcelona
Tallinn → Barcelona → Dublin
Timetable, Barcelona time
10:30BT 877 from Tallinn at the gate
10:20FR 6874 to Dublin leaves the gate
23 h 50 apart on the timetable, overnight
FR 6874 leaves 23 h 50 after BT 877 arrives on the timetable: more than half a day, so not a connection we count.