FR 3976 then DL 45 at Dublin
Barcelona → Dublin → New York JFK
Timetable, Dublin time
19:00FR 3976 from Barcelona at the gate
10:45DL 45 to New York JFK leaves the gate
15 h 45 apart on the timetable, overnight
DL 45 leaves 15 h 45 after FR 3976 arrives on the timetable: more than half a day, so not a connection we count.