SK 1854 then SK 89 at Arlanda
Alicante → Stockholm → Visby
Timetable, Stockholm time
21:05SK 1854 from Alicante at the gate
18:05SK 89 to Visby leaves the gate
21 h apart on the timetable, overnight
SK 89 leaves 21 h after SK 1854 arrives on the timetable: more than half a day, so not a connection we count.