Ben Mutzabaugh

USA TODAY

Finnair will make San Francisco its fourth U.S. destination.

The carrier will launch seasonal nonstop service to its hub in Helsinki on June 1. Finnair will fly three flights a week on Airbus A330-300 jets. The flights will operate Tuesdays, Thursdays and Sundays through the end of September.

Finnair operates a large connecting hub in Helsinki, giving San Francisco customers the option to connect to onward destinations in Europe and Asia. Finnair is a member of the oneworld frequent-flier alliance that also counts American and British Airways among its 14-airline membership.

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“We are very pleased to be taking another step forward in the growth of our airline as San Francisco is an exciting new destination for all of our customers,” Finnair chief commercial officer Juha Järvinen says in a statement. “In the same way as when Finnair flies to Asia, the northern position of our Helsinki hub will also present a quick alternative for our connecting European customers flying to North America’s West Coast.”

Finnair’s San Francisco-bound flight is scheduled for 9 hours, 20 minutes while the return to Finland is scheduled for 11 hours, 45 minutes.

The last new U.S. route launched by Finnair came in 2015, when the carrier began nonstop service between Chicago O'Hare and Helsinki. That seasonal service between with three weekly flights in 2015 but was expanded to five weekly flights for the summer 2016 schedule.

Finnair offers year-round service between Helsinki and New York JFK and Miami.

Finnair also announced on Thursday that it will add a new route within Europe, saying that seasonal service between Helsinki and Alicante, Spain, would begin March 26 and run through Oct. 27. In August, Finnair also announced two other new Spanish leisure routes – to Ibiza and Menorca –that will launch in summer 2017.

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