SK 1501 then OS 338 at Heathrow
Copenhagen → London → Vienna
Timetable, London time
21:40SK 1501 from Copenhagen at the gate
19:25OS 338 to Vienna leaves the gate
21 h 45 apart on the timetable, overnight
OS 338 leaves 21 h 45 after SK 1501 arrives on the timetable: more than half a day, so not a connection we count.