HEL - SEA

$371 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 2/12. 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, 0 bags

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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41,299,237 searches in the past 7 days on KAYAK

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Everything you should know

Cheapest round-trip
$748
Overall average: $825
Multiple Airlines
Fri 11/14Thu 11/27
HEL - SEA • 3 stops
Cheapest one-way
$371
Overall average: $654
Multiple Airlines
Thu 2/12
HEL - SEA • 2 stops
Top airlines
Icelandair
Cheapest • from $783 (round-trip)
Finnair
Best reviews • 7.6 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
When to book
3 weeks
in advance
Our data shows that travelers who book at least 3 weeks in advance save around 26% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
March
Cheapest • 14% price drop
July
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
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KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Seattle!
Flight Deals
Booking Insights
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

Fri, Nov 14 - Thu, Nov 27
Multiple Airlines Logo
5:30 am - 5:00 pmHEL-SEA
21h 30m3 stops
Multiple Airlines Logo
2:35 pm - 1:35 amSEA-HEL
25h 00m3 stops
$748Multiple Airlines
Find Deal
Fri, Nov 14 - Thu, Nov 27
Multiple Airlines Logo
5:30 am - 5:00 pmHEL-SEA
21h 30m3 stops
Multiple Airlines Logo
2:35 pm - 9:25 amSEA-HEL
32h 50m3 stops
$764Multiple Airlines
Find Deal
Fri, Nov 14 - Thu, Nov 27
Multiple Airlines Logo
5:30 am - 5:00 pmHEL-SEA
21h 30m3 stops
Multiple Airlines Logo
2:35 pm - 9:25 amSEA-HEL
32h 50m3 stops
$778Multiple Airlines
Find Deal
Fri, Nov 14 - Thu, Nov 27
Icelandair Logo
1:55 pm - 5:00 pmHEL-SEA
13h 05m1 stop
Icelandair Logo
2:35 pm - 12:55 pmSEA-HEL
12h 20m1 stop
$783Icelandair
Find Deal
Fri, Nov 14 - Thu, Nov 27
Icelandair Logo
1:55 pm - 5:00 pmHEL-SEA
13h 05m1 stop
Icelandair Logo
2:35 pm - 12:55 pmSEA-HEL
12h 20m1 stop
$798Icelandair
Find Deal
Fri, Mar 6 - Tue, Mar 10
Turkish Airlines Logo
12:30 pm - 5:05 pmHEL-SEA
38h 35m1 stop
Turkish Airlines Logo
8:00 pm - 6:05 pmSEA-HEL
37h 05m1 stop
$804Turkish Airlines
Find Deal
Fri, Nov 14 - Thu, Nov 27
KLM Logo
7:00 am - 11:45 amHEL-SEA
14h 45m1 stop
KLM Logo
2:02 pm - 5:25 pmSEA-HEL
17h 23m2 stops
$810KLM
Find Deal
Fri, Nov 14 - Thu, Nov 27
KLM Logo
7:00 am - 3:35 pmHEL-SEA
18h 35m2 stops
KLM Logo
2:02 pm - 5:25 pmSEA-HEL
17h 23m2 stops
$819KLM
Find Deal
Fri, Nov 14 - Thu, Nov 27
Delta Logo
7:00 am - 11:45 amHEL-SEA
14h 45m1 stop
Delta Logo
7:30 am - 1:10 pmSEA-HEL
19h 40m2 stops
$855Delta
Find Deal
Thu, Nov 27 - Mon, Dec 1
Delta Logo
7:00 am - 6:09 pmHEL-SEA
21h 09m2 stops
Delta Logo
2:05 pm - 4:25 pmSEA-HEL
16h 20m1 stop
$856Delta
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 Tuesdays 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 February, where the average cost of round-trip tickets is $968 and $959 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.

Yes, flying with a layover may cost you more time, but you can also save money on the route, with a 1 stop layover the cheapest option at $863 on average.

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 3 weeks before departure, which saves you about 26% 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$371
Best time to beat the crowds but there is an average 12% increase in price.
Most popular time to fly with an average 13% 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 $371 for a one-way ticket and $748 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?

    oneworld is the only airline alliance operating flights between Helsinki and Seattle.

  • 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 $795 and an overall rating of 7.1.

  • 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.

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 1335 reviews
6.7Food
8.1Crew
7.4Comfort
7.6Boarding
6.9Entertainment
Airline reviews

All reviews good because...flight from BWI to London ,economy seats was miserable. I usually book 1,step up from economy but this would have added 1500 bucks 1 way. Bit the bullet and upgraded for retun flight, otherwise all ratings would have been rock bottom.

8.0 ExcellentDavid, Oct 2025LHR - BWI
Read more Finnair reviews

All reviews good because...flight from BWI to London ,economy seats was miserable. I usually book 1,step up from economy but this would have added 1500 bucks 1 way. Bit the bullet and upgraded for retun flight, otherwise all ratings would have been rock bottom.

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.

Having been prepared for paying for everything on board other than water, coffee and tea the service was OK. Food and drink is expensive but the food was OK if limited in scope. Plane was clean and obviously well serviced. After complaining about having to walk in wind and rain to a get a bus to the airport the same thing happened at Portland. I’m sure you could get a terminal gate flight, complimentary food and drink for not much more money without traipsing through rain and slush in Reykjavik. Not bad but not great.

If there was a disclaimer regarding food service or lack thereof, l missed it. If l had known l would have prepared better. Same with transferring at Reykjavik. No information about disembarking via stairs into rain, slush and puddles deep enough to swallow a foot. After being treated to haute cuisine restaurants and warm inviting environment during the flight, the airport is, let’s be kind, disappointing. Plane was comfortable, Airbus, staff were welcoming enough. I would likely try the route again. Maybe have a night and day in Iceland. Maybe not.

They had a 4 hour delay and left my luggage in Iceland and it didn’t arrive in Portland until 11/1

Iceland air transfer was bad. They lost my luggage and I just received it 11/1

The boarding process seem to take longer than necessary, resulting in a 20+ minute delay

It was too cold in the plane my feet froze

Handling our luggage was the biggest issue - they lost it and we got it almost 3 days later. Really threw off the beginning of our trip and we really had to change our itinerary accordingly.

Seat was hard and uncomfortable and the temperature too warm and uncomfortable.

No meals included on this long international flight. Most airlines will offer you a meal when flying internationally. Not Icelandair. Your included choices are water and coffee. Poor customer service. The airport was also very confusing.

I flew Icelandair with my partner from Prague to the US. Overall flight time was around 12 hours, with a connecting flight in Iceland. I have flown internationally for years and with multiple airlines. Every airline serves you a meal when traveling internationally. Icelandair not only did not offer an inclusive meal, but they did not even offer a snack. The only things they served over our long flight was water and coffee. Ridiculous! Never again will I fly with Icelandair.

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

Information on your arrival and departure airports

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