FR 2191 then FR 3977 at Dublin
Zagreb → Dublin → Barcelona
Timetable, Dublin time
17:15FR 2191 from Zagreb at the gate
08:50FR 3977 to Barcelona leaves the gate
15 h 35 apart on the timetable, overnight
FR 3977 leaves 15 h 35 after FR 2191 arrives on the timetable: more than half a day, so not a connection we count.