DY 5510 then SK 1517 at Copenhagen
Barcelona → Copenhagen → London Heathrow
Timetable, Copenhagen time
19:15DY 5510 from Barcelona at the gate
16:40SK 1517 to London Heathrow leaves the gate
21 h 25 apart on the timetable, overnight
SK 1517 leaves 21 h 25 after DY 5510 arrives on the timetable: more than half a day, so not a connection we count.