FR 6921 then LA 5787 at Barcelona
Dublin → Barcelona → Prague
Timetable, Barcelona time
21:40FR 6921 from Dublin at the gate
17:55LA 5787 to Prague leaves the gate
20 h 15 apart on the timetable, overnight
LA 5787 leaves 20 h 15 after FR 6921 arrives on the timetable: more than half a day, so not a connection we count.