FR 3808 then FR 4587 at Barcelona
Brussels Charleroi → Barcelona → Porto
Timetable, Barcelona time
12:35FR 3808 from Brussels Charleroi at the gate
09:50FR 4587 to Porto leaves the gate
21 h 15 apart on the timetable, overnight
FR 4587 leaves 21 h 15 after FR 3808 arrives on the timetable: more than half a day, so not a connection we count.