Alaska Airlines and Finnair have begun a frequent-flyer partnership.

The move comes as Finnair prepares to launch Helsinki-San Francisco service on June 1. The carrier already flies from Helsinki to Chicago and New York.

With the partnership, Alaska Mileage Plan members will be able to accrue points flying to more than 60 destinations in Europe on Finnair.

Finnair Plus members flying the new San Francisco route will be able to accrue points on flights to 35 destinations from that city on Alaska and Virgin America.