GQ 670 then TK 1921 at Istanbul
Athens → Istanbul → Geneva
Timetable, Istanbul time
21:45GQ 670 from Athens at the gate
12:25TK 1921 to Geneva leaves the gate
14 h 40 apart on the timetable, overnight
TK 1921 leaves 14 h 40 after GQ 670 arrives on the timetable: more than half a day, so not a connection we count.