Helsinki Airport bus station is located outside, right next to the terminal and the arrivals hall.
The local bus line 600 operates from Helsinki Airport to Helsinki city centre. The travel time is about 40 minutes. Tickets can be purchased online on HSL mobile app, at the bus station's ticket machine or from R-Kioski (arrivals hall). Read more about tickets and fares on HSL website.
You can find information about schedules from the following sites:
• Helsinki Regional Transport (HSL): Journey Planner on HSL website.
• Long-haul buses: Matkahuolto website.