EC 7681 then QR 146 at Barcelona
Lisbon → Barcelona → Doha
Timetable, Barcelona time
21:20EC 7681 from Lisbon at the gate
15:20QR 146 to Doha leaves the gate
18 h apart on the timetable, overnight
QR 146 leaves 18 h after EC 7681 arrives on the timetable: more than half a day, so not a connection we count.