EW 7520 then QR 3511 at Barcelona
Hamburg → Barcelona → Santiago de Compostela
Timetable, Barcelona time
16:20EW 7520 from Hamburg at the gate
16:00QR 3511 to Santiago de Compostela leaves the gate
23 h 40 apart on the timetable, overnight
QR 3511 leaves 23 h 40 after EW 7520 arrives on the timetable: more than half a day, so not a connection we count.