SK 1854 then SK 533 at Arlanda
Alicante → Stockholm → London Heathrow
Timetable, Stockholm time
21:05SK 1854 from Alicante at the gate
18:10SK 533 to London Heathrow leaves the gate
21 h 05 apart on the timetable, overnight
SK 533 leaves 21 h 05 after SK 1854 arrives on the timetable: more than half a day, so not a connection we count.