LH 3587 then 4Y 900 at Frankfurt
QDU → Frankfurt am Main → Dubrovnik
Timetable, Frankfurt am Main time
12:13LH 3587 from QDU at the gate
09:254Y 900 to Dubrovnik leaves the gate
21 h 12 apart on the timetable, overnight
4Y 900 leaves 21 h 12 after LH 3587 arrives on the timetable: more than half a day, so not a connection we count.