FR 4584 then LA 5789 at Barcelona
Porto → Barcelona → Seville
Timetable, Barcelona time
18:55FR 4584 from Porto at the gate
11:45LA 5789 to Seville leaves the gate
16 h 50 apart on the timetable, overnight
LA 5789 leaves 16 h 50 after FR 4584 arrives on the timetable: more than half a day, so not a connection we count.