LH 99 then 4Y 900 at Frankfurt
Munich → Frankfurt am Main → Dubrovnik
Timetable, Frankfurt am Main time
12:00LH 99 from Munich at the gate
09:254Y 900 to Dubrovnik leaves the gate
21 h 25 apart on the timetable, overnight
4Y 900 leaves 21 h 25 after LH 99 arrives on the timetable: more than half a day, so not a connection we count.