DY 4002 then SK 4 at Arlanda
Umea → Stockholm → Lulea
Timetable, Stockholm time
08:00DY 4002 from Umea at the gate
07:40SK 4 to Lulea leaves the gate
23 h 40 apart on the timetable, overnight
SK 4 leaves 23 h 40 after DY 4002 arrives on the timetable: more than half a day, so not a connection we count.