A3 601 then GQ 840 at Athens
London Heathrow → Athens → Vienna
Timetable, Athens time
17:50A3 601 from London Heathrow at the gate
16:30GQ 840 to Vienna leaves the gate
22 h 40 apart on the timetable, overnight
GQ 840 leaves 22 h 40 after A3 601 arrives on the timetable: more than half a day, so not a connection we count.