LL 5457 then FR 4587 at Barcelona
Vigo → Barcelona → Porto
Timetable, Barcelona time
11:45LL 5457 from Vigo at the gate
09:50FR 4587 to Porto leaves the gate
22 h 05 apart on the timetable, overnight
FR 4587 leaves 22 h 05 after LL 5457 arrives on the timetable: more than half a day, so not a connection we count.