BT 151 then SK 342 at Oslo
Riga → Oslo → Trondheim
Timetable, Oslo time
07:40BT 151 from Riga at the gate
11:40SK 342 to Trondheim leaves the gate
4 h apart on the timetable
The last days
BT 151 and SK 342 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.