FR 3977 then FI 6405 at Barcelona
Dublin → Barcelona → Lisbon
Timetable, Barcelona time
21:10FR 3977 from Dublin at the gate
14:35FI 6405 to Lisbon leaves the gatealso S4 8947
17 h 25 apart on the timetable, overnight
FI 6405 leaves 17 h 25 after FR 3977 arrives on the timetable: more than half a day, so not a connection we count.