VY 677 then QR 3771 at Barcelona
Nice → Barcelona → Porto
Timetable, Barcelona time
03:20VY 677 from Nice at the gate
18:35QR 3771 to Porto leaves the gatealso IB 5094, LL 5094
15 h 15 apart on the timetable
QR 3771 leaves 15 h 15 after VY 677 arrives on the timetable: more than half a day, so not a connection we count.