BA 814 then SK 2583 at Copenhagen
London Heathrow → Copenhagen → Luxembourg
Timetable, Copenhagen time
17:55BA 814 from London Heathrow at the gate
17:45SK 2583 to Luxembourg leaves the gate
23 h 50 apart on the timetable, overnight
SK 2583 leaves 23 h 50 after BA 814 arrives on the timetable: more than half a day, so not a connection we count.