A3 899 then A3 270 at Athens
Yerevan → Athens → Chios
Timetable, Athens time
06:15A3 899 from Yerevan at the gate
05:50A3 270 to Chios leaves the gate
23 h 35 apart on the timetable, overnight
A3 270 leaves 23 h 35 after A3 899 arrives on the timetable: more than half a day, so not a connection we count.