SK 23 then SK 20 at Arlanda
Umea → Stockholm → Lulea
Timetable, Stockholm time
07:35SK 23 from Umea at the gate
18:40SK 20 to Lulea leaves the gate
11 h 05 apart on the timetable
The last days
SK 23 and SK 20 weren’t both flown 15 min to 12 h apart in the last 21 days.
Statistics from past flights, not live flight information. Always check times and your connection with your airline, and don’t base travel or booking decisions on these numbers.