Cheap Flights from Helsinki to San Francisco from US$640

Frequently Asked Questions

• What are the cheapest flights from Helsinki to San Francisco (HEL-SFO)?

  Based on Trip.com data, Norwegian Air Sweden offers one-way fares as low as US$640 on Cheapest nonstop routes (e.g. HEL to SFO on Mon, Sep 7), while Scandinavian Airlines offers Cheapest nonstop round-trips from US$845 departing on Wed, Sep 23 and returning on Wed, Sep 30.

• Which airlines offer direct flights from Helsinki to San Francisco?

  At the moment, you can catch a nonstop flight from Helsinki to San Francisco with the following airlines, including: French Bee Selected airlines are based on historical data collected from flight bookings users made on Trip.com within the last 90 days.

• When is the best time to book flights from Helsinki to San Francisco?

  By analyzing data from all airlines on the Trip.com flight calendar, it looks like the best time to book a flight from Helsinki to San Francisco is around 40 days (6 weeks) in advance, and the best time to fly is usually on Tuesday, Wednesday, and Saturday. Tuesday typically offers the cheapest flights for departure, while Saturday offers the best return deals.

• How can I find the best deals on flights from Helsinki to San Francisco?

  To find best deals on flights from Helsinki to San Francisco, you can use various tools on Trip.com:
  · Be flexible with your travel dates to get the cheapest flight deal. Now the cheapest flight deal is on Mon, Sep 7, with one-way flights priced at just US$640.
  · Compare airlines strategically. Budget carriers often provide the lowest base fares, while we found the most affordable airline currently operating on this route is Norwegian Air Sweden.
  · Set up price alerts to easily monitor ticket prices without having to check every day.
  · Check Trip.com flight deals and promo codes frequently.
  · Avoid peak season unless you book very early. It seems the peak season for San Francisco travel is around July.
  · Get exclusive promo codes for Trip.com app users.

• When are flight tickets from Helsinki (HEL) to San Francisco (SFO) the cheapest?

  The cheapest months to fly from Helsinki to San Francisco is September, when demand for travel is lower.

• Which upcoming date is cheapest to fly from Helsinki to San Francisco on?

  After crunching the numbers on our August flight calendar, it's currently cheapest to fly from Helsinki to San Francisco on August 19, 2026 with Finnair, with prices starting at US$754.

• Which airports can I fly to for San Francisco from Helsinki?

  You can land at any one of the following hubs in San Francisco, with Helsinki Airport to San Francisco International Airport (HEL-SFO) is by far the most common option on this route: San Francisco International Airport (SFO).

• Is there any time difference between Helsinki and San Francisco?

  The time difference between San Francisco and Helsinki is 10h.

• How do I change or cancel my ticket from Helsinki to San Francisco?

  Tickets can only be changed or canceled if permitted by airline policy. To submit a change or cancellation request, go to the flight bookings page, select the option to change or cancel your booking, choose the relevant passengers and segment, and submit a request. Please note that additional charges may apply according to the airline ticket policy. However, if the flight has been rescheduled and you would like to change or cancel your ticket, you can submit an involuntary cancellation request. For more details about change and cancellation policies, please check the customer support pages.

• What is the average cost of a one-way flight from Helsinki to San Francisco?

  Based on Trip.com data for flights departing in the next 30 days, the average one-way fare from Helsinki to San Francisco is US$1,599. Fares vary by travel date, airline and availability.

• How do I book flights from Helsinki to San Francisco on Trip.com?

  Enter Helsinki and San Francisco, choose your travel dates and passengers, then compare flights by price, duration and baggage. Select a fare, review the change and cancellation rules, enter traveler details and complete payment to receive your confirmation.