SK 7 then SK 2728 at Arlanda
Lulea → Stockholm → Turku
Timetable, Stockholm time
20:25SK 7 from Lulea at the gate
15:20SK 2728 to Turku leaves the gate
18 h 55 apart on the timetable, overnight
SK 2728 leaves 18 h 55 after SK 7 arrives on the timetable: more than half a day, so not a connection we count.