EC 3749 then QR 4706 at Barcelona
Milan → Barcelona → Porto
Timetable, Barcelona time
21:30EC 3749 from Milan at the gate
20:25QR 4706 to Porto leaves the gatealso IB 5096, LL 5096
22 h 55 apart on the timetable, overnight
QR 4706 leaves 22 h 55 after EC 3749 arrives on the timetable: more than half a day, so not a connection we count.