TK 2679 then GQ 671 at Istanbul
Mardin → Istanbul → Athens
Timetable, Istanbul time
20:20TK 2679 from Mardin at the gate
10:30GQ 671 to Athens leaves the gate
14 h 10 apart on the timetable, overnight
GQ 671 leaves 14 h 10 after TK 2679 arrives on the timetable: more than half a day, so not a connection we count.