QR 3630 then QR 4704 at Barcelona
Firenze → Barcelona → Porto
Timetable, Barcelona time
14:55QR 3630 from Firenze at the gatealso IB 5375, LL 5375, VY 6075
08:35QR 4704 to Porto leaves the gate
17 h 40 apart on the timetable, overnight
QR 4704 leaves 17 h 40 after QR 3630 arrives on the timetable: more than half a day, so not a connection we count.