A3 241 then GQ 670 at Athens
Samos → Athens → Istanbul
Timetable, Athens time
09:30A3 241 from Samos at the gate
06:55GQ 670 to Istanbul leaves the gate
21 h 25 apart on the timetable, overnight
GQ 670 leaves 21 h 25 after A3 241 arrives on the timetable: more than half a day, so not a connection we count.