There are three ways to get to/from the airport, Arlanda, which is north of Stockholm: 1. taxi/uber (500 sek) 2. Arlanda express (280 sek) 3. Flygbussarna - airport coach, which takes 40 minutes (109 sek, 99 sek if you buy in advance). The coach is your cheapest option, and an easy / comfortable journey. It drops you at T-Centalen.