LH 283 then 4Y 900 at Frankfurt
Bologna → Frankfurt am Main → Dubrovnik
Timetable, Frankfurt am Main time
11:45LH 283 from Bologna at the gate
09:254Y 900 to Dubrovnik leaves the gate
21 h 40 apart on the timetable, overnight
4Y 900 leaves 21 h 40 after LH 283 arrives on the timetable: more than half a day, so not a connection we count.