FR 863 then FR 3977 at Dublin
Rzeszow → Dublin → Barcelona
Timetable, Dublin time
12:40FR 863 from Rzeszow at the gate
08:50FR 3977 to Barcelona leaves the gate
20 h 10 apart on the timetable, overnight
FR 3977 leaves 20 h 10 after FR 863 arrives on the timetable: more than half a day, so not a connection we count.