IB 833 then GQ 670 at Athens
Madrid → Athens → Istanbul
Timetable, Athens time
15:10IB 833 from Madrid at the gate
06:55GQ 670 to Istanbul leaves the gate
15 h 45 apart on the timetable, overnight
GQ 670 leaves 15 h 45 after IB 833 arrives on the timetable: more than half a day, so not a connection we count.