QR 3751 then LX 1951 at Barcelona
Seville → Barcelona → Zurich
Timetable, Barcelona time
11:50QR 3751 from Seville at the gatealso IB 5507, LL 5507
06:20LX 1951 to Zurich leaves the gate
18 h 30 apart on the timetable, overnight
LX 1951 leaves 18 h 30 after QR 3751 arrives on the timetable: more than half a day, so not a connection we count.