SK 1768 then SK 89 at Arlanda
Prague → Stockholm → Visby
Timetable, Stockholm time
21:15SK 1768 from Prague at the gate
18:05SK 89 to Visby leaves the gate
20 h 50 apart on the timetable, overnight
SK 89 leaves 20 h 50 after SK 1768 arrives on the timetable: more than half a day, so not a connection we count.