FR 3977 then IB 5988 at Barcelona
Dublin → Barcelona → Cairo
Timetable, Barcelona time
21:10FR 3977 from Dublin at the gate
14:10IB 5988 to Cairo leaves the gatealso LL 5988, VY 8592
17 h apart on the timetable, overnight
IB 5988 leaves 17 h after FR 3977 arrives on the timetable: more than half a day, so not a connection we count.