BA 480 then FR 6874 at Barcelona
London Heathrow → Barcelona → Dublin
Timetable, Barcelona time
13:40BA 480 from London Heathrow at the gatealso IB 3662, QR 6297, AA 6818, VY 9558
10:45FR 6874 to Dublin leaves the gate
21 h 05 apart on the timetable, overnight
FR 6874 leaves 21 h 05 after BA 480 arrives on the timetable: more than half a day, so not a connection we count.