FR 4584 then IB 5146 at Barcelona
Porto → Barcelona → Seville
Timetable, Barcelona time
11:05FR 4584 from Porto at the gate
09:10IB 5146 to Seville leaves the gate
22 h 05 apart on the timetable, overnight
IB 5146 leaves 22 h 05 after FR 4584 arrives on the timetable: more than half a day, so not a connection we count.