From the Helsinki-Vantaa Airport you can take either train, bus or taxi. Trains I and P go every 10 minutes from the airport to the Central railway station (between 4.30-1.30). The trip takes about 30min.
The bus 615 runs from the airport every 30 minutes 24-hours and the trip is taking approximately 45 minutes. It's also possible to choose Finnair city bus, which runs every 20 minutes non-stop to the Central railway station.
Taxi will take you to the city center from the airport about in 20-30 minutes.
FROM FERRY HARBOURS
Ferriers bring passengers to Helsinki mostly from Stockholm and Tallinn. The ferries coming from Stockholm have their harbours near the city center either in Katajanokka (Viking Line) or Eteläsatama (Silja Line), which both are accessible by walking and public transport.
Some of the ferries arriving from Tallinn have their harbour in Jätkäsaari in West Harbour (Eckerö Line), which can be reached the easiest by trams 6 & 7.
HOW TO REACH THE CONFERENCE VENUE
The conference venues are in the heart of the Helsinki city center next to each other and easily accessible by walking, city bikes or public transport.
Will be updated...