A3 247 then GQ 670 at Athens
Samos → Athens → Istanbul
Timetable, Athens time
17:45A3 247 from Samos at the gate
06:55GQ 670 to Istanbul leaves the gate
13 h 10 apart on the timetable, overnight
GQ 670 leaves 13 h 10 after A3 247 arrives on the timetable: more than half a day, so not a connection we count.