FR 4584 then IB 2603 at Barcelona
Porto → Barcelona → Buenos Aires
Timetable, Barcelona time
18:35FR 4584 from Porto at the gate
08:20IB 2603 to Buenos Aires leaves the gatealso LL 2603, AY 5353, QR 6953
13 h 45 apart on the timetable, overnight
IB 2603 leaves 13 h 45 after FR 4584 arrives on the timetable: more than half a day, so not a connection we count.