BA 630 then GQ 242 at Athens
London Heathrow → Athens → Chios
Timetable, Athens time
13:25BA 630 from London Heathrow at the gate
11:00GQ 242 to Chios leaves the gate
21 h 35 apart on the timetable, overnight
GQ 242 leaves 21 h 35 after BA 630 arrives on the timetable: more than half a day, so not a connection we count.