FR 3808 then FR 4545 at Barcelona
Brussels Charleroi → Barcelona → Porto
Timetable, Barcelona time
08:30FR 3808 from Brussels Charleroi at the gate
20:40FR 4545 to Porto leaves the gate
12 h 10 apart on the timetable
FR 4545 leaves 12 h 10 after FR 3808 arrives on the timetable: more than half a day, so not a connection we count.