A3 275 then IB 834 at Athens
Chios → Athens → Madrid
Timetable, Athens time
17:00A3 275 from Chios at the gate
15:50IB 834 to Madrid leaves the gate
22 h 50 apart on the timetable, overnight
IB 834 leaves 22 h 50 after A3 275 arrives on the timetable: more than half a day, so not a connection we count.