A3 223 then GQ 670 at Athens
Kos → Athens → Istanbul
Timetable, Athens time
15:05A3 223 from Kos at the gate
07:00GQ 670 to Istanbul leaves the gate
15 h 55 apart on the timetable, overnight
GQ 670 leaves 15 h 55 after A3 223 arrives on the timetable: more than half a day, so not a connection we count.