FR 4584 then QR 3597 at Barcelona
Porto → Barcelona → Santiago de Compostela
Timetable, Barcelona time
09:00FR 4584 from Porto at the gate
07:10QR 3597 to Santiago de Compostela leaves the gate
22 h 10 apart on the timetable, overnight
QR 3597 leaves 22 h 10 after FR 4584 arrives on the timetable: more than half a day, so not a connection we count.