LL 5457 then FR 4545 at Barcelona
Vigo → Barcelona → Porto
Timetable, Barcelona time
11:45LL 5457 from Vigo at the gate
06:45FR 4545 to Porto leaves the gate
19 h apart on the timetable, overnight
FR 4545 leaves 19 h after LL 5457 arrives on the timetable: more than half a day, so not a connection we count.