Connecting flights – transfers
If you are flying to Stockholm Arlanda Airport and are going to fly directly on a domestic flight from another terminal, you must go through airport security and then pass through a new security control in the other terminal. If you are coming from an international destination and are going to continue on an international flight, it is not certain that you will pass through a new security control. This depends on which country you have come from, and which country you are travelling onwards to.
There are buses at the airport which transfer you at no cost between the different terminals and SkyCity, but you can also walk inside between the different terminals.