EN 315 then 4Y 900 at Frankfurt
Firenze → Frankfurt am Main → Dubrovnik
Timetable, Frankfurt am Main time
15:55EN 315 from Firenze at the gate
09:254Y 900 to Dubrovnik leaves the gate
17 h 30 apart on the timetable, overnight
4Y 900 leaves 17 h 30 after EN 315 arrives on the timetable: more than half a day, so not a connection we count.