Originally Posted by
SK AAR
But you are clearly not obsessive about going to the airport early
When you have no checked luggage and your BP in the SK app, you will be fine if you arrive at at the airport 45-60min before depart. The passport scrutiny, security questions etc for a US departure will be done at ARN, not CPH.
The key is if having the boarding pass for CPH-ARN and/or CPH-ARN-EWR before showing up at the airport on a CPH-ARN-EWR itinerary. Otherwise there is a chance of being hassled at CPH and missing the flight when showing up 45-60 minutes before trip on a non-US passport.