HSL area and zones
The HSL area consists of Helsinki, Espoo, Vantaa, Kauniainen, Siuntio, Kirkkonummi, Sipoo, Kerava and Tuusula.
The HSL area is divided into four zones, identified by letters A, B, C and D, spreading out from the center of Helsinki.
Residents of the neighboring municipalities can buy season tickets at the same price as residents of the HSL area. Correspondingly, residents of the HSL municipalities can purchase commuter tickets for some of the neighboring municipalities.