AY 811 then SK 81 at Arlanda
Helsinki → Stockholm → Visby
Timetable, Stockholm time
13:35AY 811 from Helsinki at the gate
10:20SK 81 to Visby leaves the gate
20 h 45 apart on the timetable, overnight
SK 81 leaves 20 h 45 after AY 811 arrives on the timetable: more than half a day, so not a connection we count.