FR 6926 then QR 4686 at Barcelona
Rome → Barcelona → Lisbon
Timetable, Barcelona time
21:10FR 6926 from Rome at the gate
15:50QR 4686 to Lisbon leaves the gatealso IB 5114, LL 5114
18 h 40 apart on the timetable, overnight
QR 4686 leaves 18 h 40 after FR 6926 arrives on the timetable: more than half a day, so not a connection we count.