TK 165 then GQ 671 at Istanbul
Hanoi → Istanbul → Athens
Timetable, Istanbul time
05:35TK 165 from Hanoi at the gate
22:45GQ 671 to Athens leaves the gate
17 h 10 apart on the timetable
GQ 671 leaves 17 h 10 after TK 165 arrives on the timetable: more than half a day, so not a connection we count.