OSL Security Times
 

Flying OSL-AMS and then beyond on Sunday morning (09:20) in mid-June. Is arrival at airport on earliest train (07:17) plenty of time for that part of the week?

The longest OSL security lines I encounter are in the summer at or around 9am, but Sunday morning would be less busy than other days of the week in my experience..

But 90 minutes should be sufficient to check in and clear security and make it to the gate on time.

I schedule to arrive at the airport about 2 hours before departure when flying out of OSL (check in, luggage drop off and through security). And ends up almost always with plenty of time. That should also apply for sunday morning mid -June.