LH 335 then 4Y 900 at Frankfurt
Napoli → Frankfurt am Main → Dubrovnik
Timetable, Frankfurt am Main time
16:20LH 335 from Napoli at the gate
09:254Y 900 to Dubrovnik leaves the gate
17 h 05 apart on the timetable, overnight
4Y 900 leaves 17 h 05 after LH 335 arrives on the timetable: more than half a day, so not a connection we count.