SK 1749 then AY 820 at Arlanda
Tallinn → Stockholm → Helsinki
Timetable, Stockholm time
21:45SK 1749 from Tallinn at the gate
21:15AY 820 to Helsinki leaves the gate
23 h 30 apart on the timetable, overnight
AY 820 leaves 23 h 30 after SK 1749 arrives on the timetable: more than half a day, so not a connection we count.