FR 3976 then AA 723 at Dublin
Barcelona → Dublin → Philadelphia
Timetable, Dublin time
14:40FR 3976 from Barcelona at the gate
11:30AA 723 to Philadelphia leaves the gate
20 h 50 apart on the timetable, overnight
AA 723 leaves 20 h 50 after FR 3976 arrives on the timetable: more than half a day, so not a connection we count.