FR 1644 then TK 1886 at Vienna
Rome → Vienna → Istanbul
Timetable, Vienna time
20:00FR 1644 from Rome at the gate
14:05TK 1886 to Istanbul leaves the gate
18 h 05 apart on the timetable, overnight
TK 1886 leaves 18 h 05 after FR 1644 arrives on the timetable: more than half a day, so not a connection we count.