QR 3702 then LA 5756 at Barcelona
Milan → Barcelona → Dubrovnik
Timetable, Barcelona time
21:05QR 3702 from Milan at the gate
18:00LA 5756 to Dubrovnik leaves the gate
20 h 55 apart on the timetable, overnight
LA 5756 leaves 20 h 55 after QR 3702 arrives on the timetable: more than half a day, so not a connection we count.