EI 3403 then FR 3977 at Dublin
Donegal → Dublin → Barcelona
Timetable, Dublin time
15:25EI 3403 from Donegal at the gate
08:30FR 3977 to Barcelona leaves the gate
17 h 05 apart on the timetable, overnight
FR 3977 leaves 17 h 05 after EI 3403 arrives on the timetable: more than half a day, so not a connection we count.