HEL - SEA

$469 Find Cheap Flights from Helsinki to Seattle

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Helsinki to Seattle departing on 10/15. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy

KAYAK searches hundreds of travel sites at once for deals on flights to Seattle

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Helsinki to Seattle, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Helsinki to Seattle, as well as popular online travel agencies
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Flight Deals

Cheap Flights from Helsinki to Seattle (HEL-SEA)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Helsinki to Seattle that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Helsinki to Seattle

Thu, Oct 2 - Wed, Oct 15
 Logo
1:45 pm - 2:00 pmHEL-SEA
34h 15m2 stops
 Logo
4:20 pm - 8:20 amSEA-HEL
30h 00m3 stops
Thu, Oct 2 - Wed, Oct 15
 Logo
1:45 pm - 2:00 pmHEL-SEA
34h 15m2 stops
 Logo
4:20 pm - 8:20 amSEA-HEL
30h 00m3 stops
Thu, Oct 2 - Wed, Oct 15
Scandinavian Airlines Logo
11:05 am - 2:00 pmHEL-SEA
36h 55m2 stops
Scandinavian Airlines Logo
4:20 pm - 11:35 pmSEA-HEL
21h 15m2 stops
$631Scandinavian Airlines
Find Deal
Thu, Oct 2 - Wed, Oct 15
Scandinavian Airlines Logo
9:00 pm - 2:00 pmHEL-SEA
27h 00m1 stop
Scandinavian Airlines Logo
4:20 pm - 10:35 amSEA-HEL
32h 15m1 stop
$683Scandinavian Airlines
Find Deal
Mon, Sep 15 - Mon, Sep 22
Turkish Airlines Logo
12:35 pm - 10:35 amHEL-SEA
32h 00m1 stop
Turkish Airlines Logo
7:10 pm - 11:40 amSEA-HEL
30h 30m1 stop
$754Turkish Airlines
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Sun, Oct 5 - Sun, Oct 12
Icelandair Logo
8:35 pm - 8:40 pmHEL-SEA
34h 05m2 stops
Icelandair Logo
3:45 pm - 7:45 pmSEA-HEL
18h 00m2 stops
$782Icelandair
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Sat, Oct 18 - Sat, Nov 1
Turkish Airlines Logo
12:35 pm - 5:15 pmHEL-SEA
38h 40m1 stop
Turkish Airlines Logo
8:00 pm - 6:05 pmSEA-HEL
37h 05m1 stop
$788Turkish Airlines
Find Deal
Sun, Oct 5 - Sun, Oct 12
Icelandair Logo
8:35 pm - 5:50 pmHEL-SEA
31h 15m2 stops
Icelandair Logo
3:45 pm - 2:00 pmSEA-HEL
12h 15m1 stop
$813Icelandair
Find Deal
Thu, Sep 18 - Thu, Sep 25
Delta Logo
7:00 am - 11:45 amHEL-SEA
14h 45m1 stop
Delta Logo
11:46 am - 4:40 pmSEA-HEL
18h 54m2 stops
$827Delta
Find Deal
Mon, Sep 15 - Mon, Sep 22
Delta Logo
7:00 am - 11:45 amHEL-SEA
14h 45m1 stop
Delta Logo
9:25 am - 1:00 pmSEA-HEL
17h 35m2 stops
$835Delta
Find Deal
Booking Insights

KAYAK's insights & trends for Helsinki to Seattle flights

Get data-powered insights and trends into flights from Helsinki to Seattle to help you find the cheapest flights, the best time to fly and much more.

What’s the cheapest day of the week to fly from Helsinki to Seattle?

The average price of all round-trip flights from Helsinki to Seattle clicked on KAYAK for each day over the last 12 months.

If your flying dates are flexible, you should consider flying to Seattle on a Thursday, as we generally find the cheapest rates on that day for this route. On the other hand, Wednesday is the most expensive day to fly from Helsinki to Seattle. For your return ticket, we recommend flying on a Sunday and avoiding Fridays for the best deals.

What is the cheapest month to fly from Helsinki to Seattle?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Helsinki to Seattle, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Helsinki to Seattle is March, where tickets cost $733 (return) on average. On the other hand, the most expensive months are July and August, where the average cost of round-trip tickets is $969 and $917 respectively.

Can I save money by flying with a layover from Helsinki to Seattle?

The average round-trip price for all non-stop flights, flights with one layover, and flights with two layovers for the route found by users searching on KAYAK in the last 2 weeks.

No, with an average price for the route of $1,051, prices are generally cheapest when you fly direct.

How far in advance should I book a flight from Helsinki to Seattle?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Helsinki to Seattle, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from Helsinki to Seattle, you should book around 5 weeks before departure, which saves you about 21% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 25 weeks before departure.

Good to know

Low seasonFebruary
Cheapest flight$469
Best time to beat the crowds with an average 5% drop in price.
Most popular time to fly with an average 17% increase in price.
Flight from Helsinki to Seattle

When to book flights from Helsinki to Seattle

Are your dates flexible? Find out the best times to travel from Helsinki to Seattle based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Helsinki to Seattle

  • What is the cheapest flight from Helsinki to Seattle?

    In the last 3 days, the lowest price for a flight from Helsinki to Seattle was $469 for a one-way ticket and $571 for a round-trip.

  • Do I need a passport to fly between Helsinki and Seattle?

    Yes, you'll most likely have to show a valid passport before boarding the plane in Helsinki and on arrival in Seattle.

  • Which airports will I be using when flying from Helsinki to Seattle?

    On your way to Seattle, you’ll fly out from Helsinki-Vantaa. You’ll be landing at Seattle/Tacoma Intl.

  • Which aircraft models fly most regularly from Helsinki to Seattle?

    The Airbus A330-300 is the aircraft model that flies most regularly on the Helsinki to Seattle flight route.

  • Which airline alliances offer flights from Helsinki to Seattle?

    SkyTeam, and Star Alliance are the airline alliances operating flights between Helsinki and Seattle, with SkyTeam being the most commonly used for this route.

  • Which is the best airline for flights from Helsinki to Seattle, Finnair or Icelandair?

    The two airlines most popular with KAYAK users for flights from Helsinki to Seattle are Finnair and Icelandair. With an average price for the route of $862 and an overall rating of 7.6, Finnair is the most popular choice. Icelandair is also a great choice for the route, with an average price of $775 and an overall rating of 7.0.

  • How does KAYAK find such low prices on flights from Helsinki to Seattle?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Helsinki to Seattle.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Helsinki to Seattle?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Seattle from Helsinki is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Helsinki to Seattle?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Seattle with an airline and back to Helsinki with another airline. Booking your flights between Helsinki and SEA can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Helsinki to Seattle?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Seattle from Helsinki up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

KAYAK’s top tips for finding a cheap flight from Helsinki to Seattle

  • Looking for a cheap flight? 25% of our users found flights on this route for $1,231 or less one-way.

Reviews of the top airlines flying from Helsinki to Seattle

 
See real verified KAYAK customer reviews for airlines flying from Helsinki to Seattle. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Helsinki to Seattle? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.6
FinnairOverall score based on 1320 reviews
7.6Boarding
8.1Crew
6.7Food
7.5Comfort
6.9Entertainment
Airline reviews

Great. It was awesome to have boarding from the front and back of the plane as it made the process go very quickly

10.0 ExcellentSarah, Aug 2025CPH - HEL
Read more Finnair reviews

Great. It was awesome to have boarding from the front and back of the plane as it made the process go very quickly

It was okay. The airplane was a little smaller than a flight from Thailand to Helsinki.

Wish that everyone would board the back of the plane first. Also let kids on first. The gate wasn’t open at arrival and we waited 45 minutes to takeoff. They made up for time in the air.

This was an absolutely exceptional flight. The flight attendants were extremely attentive and very friendly. They seemed to go out of their way to make us comfortable and to make sure that we had everything we needed., We were in business and were very happy with the size and the details for our pods. We would definitely recommend Finnair and will definitely be flying with them again.

We had an excellent trip with Finnair. This was our first time and we’re very pleased. The only issue was with the boarding - it was a little bit confusing and needs a little bit of streamlining.

Crew very lovely. Arrived an hour late due to bad weather. We were given new tickets to an other flight but it could have been organised better, so we did not have to run through the whole airport to.

Flight delayed over an hour. They said they would hold our connection but then did not.

Major problems checking in at Alaska counter. They could not find our booking code because it came from Finnair.

Do not use KAYAK or Finair for future travel. Unless you purchase the tickets directly from the airline, you were going to have a difficult time checking in. Kayak canceled my flights twice and ended up causing great difficulty in me getting back from Europe because they double sold my tickets between American Airlines and Finair. The event caused significant delays and led to me having to rebook my flights.

The staff were all particularly great. The plane was clean and fresh. The bassinet worked great. It was all very nice.

The crew was wonderful at check in, the gate and on board. Felt the luggage had more room than the passengers. The seats were smaller than most domestic U.S. airlines. I'm only 5'2" and I had little legroom. There were only 2 bathrooms in coach. Needed more. The flight was very smooth but not the most comfortable.

There was no lounge at Boston for us to use. Typically flying first class overseas comes with lounge privileges. The seats did not recline even a little. My headset only worked on one side. I felt like I was flying on Ryan Air, not Icelandic Air.

Boarded with no problems. Sat on the tarmac for an hour before taking off. We were the last ones on our connecting flight. Didn't think we were going to make it. Our flight to Iceland was similarly delayed. When we've flown other airlines, pilots have tried to make up time while in the air. This doesn't seem to be something that Icelandair does. We made all of our flights, but it was stressful and we didn't think it was going to happen based on the time we arrived.

The flight was delayed and as a consequence we missed our connecting flight. Were stuck for another 6h in Reykyavik. Appreciated that we got a generous food voucher at least. Would have liked to see more information upon arrival including a person waiting for connecting flight travellers and informing already that we will not catch the flight and directing us to the office dealing with the matter; unfortunately that didnt happen and we hence first needed to find out whether flight had indeed left already and then locate the adequate office to help us with booking us on the next connecting flight. Also my suitcase broke and it is not clear whether it is happened on the leg with Iceland Air from DC to Reykyavik or on the leg with Lufthansa from Reykyavik to Frankfurt. Finally, understood that it is a low cost company but at least provision of earplugs for free would have been nice, instead of making them buy.

Great experience on Icelandair flight from Newark to Amsterdam by way of Reykjavík. Courteous and professional staff. Food was solid. Service - outstanding. Cabin was a little warm.

Good service. No complementary food for international flight. WiFi kinda pricey. Got the job done for the right price.

The plane was very small and the aisle was so narrow that every time someone walked by they rubbed against me, so it was very uncomfortable.

Overall good for an economy fare. IMO the movie selection could be improved. Great that you can now connect bluetooth headphones to the entertainment system.

For a four hour flight, I was disappointed that everything was for purchase except for coffee, tea, or water. The disembarking in Iceland was so inefficient and time-consuming. We landed and stopped in the middle of the tarmac, had to disembark in the rain, and then squeeze into a bus which took us to the airport. Crazy! How does that work in winter?

Comfort of seats is not good. Like sitting on a rock for 6 hours. Also no in flight food and limited beverages unless you pay is not nice. Need flight to be dark during the “night” but attendants don’t ask for shades to be lowered..

Everything you need to know for your flight from Helsinki to Seattle

Information on your arrival and departure airports

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