FR 7538 then QR 4686 at Barcelona
Milan → Barcelona → Lisbon
Timetable, Barcelona time
00:40FR 7538 from Milan at the gate
15:50QR 4686 to Lisbon leaves the gatealso IB 5114, LL 5114
15 h 10 apart on the timetable
QR 4686 leaves 15 h 10 after FR 7538 arrives on the timetable: more than half a day, so not a connection we count.