FR 6558 then FR 4587 at Barcelona
Liverpool → Barcelona → Porto
Timetable, Barcelona time
18:10FR 6558 from Liverpool at the gate
15:35FR 4587 to Porto leaves the gate
21 h 25 apart on the timetable, overnight
FR 4587 leaves 21 h 25 after FR 6558 arrives on the timetable: more than half a day, so not a connection we count.