BA 776 then SK 1833 at Arlanda
London Heathrow → Stockholm → Athens
Timetable, Stockholm time
11:25BA 776 from London Heathrow at the gate
06:00SK 1833 to Athens leaves the gate
18 h 35 apart on the timetable, overnight
SK 1833 leaves 18 h 35 after BA 776 arrives on the timetable: more than half a day, so not a connection we count.