GQ 671 then GQ 770 at Athens
Istanbul → Athens → Warsaw Chopin
Timetable, Athens time
23:10GQ 671 from Istanbul at the gate
15:15GQ 770 to Warsaw Chopin leaves the gate
16 h 05 apart on the timetable, overnight
GQ 770 leaves 16 h 05 after GQ 671 arrives on the timetable: more than half a day, so not a connection we count.