FR 4584 then IB 2629 at Barcelona
Porto → Barcelona → Miami
Timetable, Barcelona time
18:35FR 4584 from Porto at the gate
15:05IB 2629 to Miami leaves the gatealso LL 2629, AY 5399, QR 8000, AA 8791
20 h 30 apart on the timetable, overnight
IB 2629 leaves 20 h 30 after FR 4584 arrives on the timetable: more than half a day, so not a connection we count.