TK 1591 then 4Y 900 at Frankfurt
Istanbul → Frankfurt am Main → Dubrovnik
Timetable, Frankfurt am Main time
13:55TK 1591 from Istanbul at the gate
09:204Y 900 to Dubrovnik leaves the gate
19 h 25 apart on the timetable, overnight
4Y 900 leaves 19 h 25 after TK 1591 arrives on the timetable: more than half a day, so not a connection we count.