Tram 7 

Single tram tickets can be purchased e.g. using the mobile app HSL Mobiililippu, or HSL ticket machines.
The ticket machine you will find by the tram stops.

Connections

Railway station (3 km) Trams 2 and 3 , get off at stop Rautatieasema.
Kamppi bus terminal (2,5 km) Tram 7, get off at stop Kamppi (M) and walk to Kamppi shopping centre.
Helsinki airport (23,8 km) Trams 7, get off at stop Rautatieasema and then either bus 615, 615T , Finnair City Bus or trains I and P.
 

West Terminal 1: Connections