FR 8230 then FR 4587 at Barcelona
London Stansted → Barcelona → Porto
Timetable, Barcelona time
13:15FR 8230 from London Stansted at the gate
09:50FR 4587 to Porto leaves the gate
20 h 35 apart on the timetable, overnight
FR 4587 leaves 20 h 35 after FR 8230 arrives on the timetable: more than half a day, so not a connection we count.