GQ 671 then GQ 720 at Athens
Istanbul → Athens → Tel Aviv
Timetable, Athens time
23:10GQ 671 from Istanbul at the gate
20:30GQ 720 to Tel Aviv leaves the gate
21 h 20 apart on the timetable, overnight
GQ 720 leaves 21 h 20 after GQ 671 arrives on the timetable: more than half a day, so not a connection we count.