SEA - HEL

$479 Find Cheap Flights from Seattle to Helsinki

This is the cheapest round-trip flight price found by a KAYAK user in the last 72 hours by searching for a flight from Seattle to Helsinki departing on 2/27. 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 Helsinki

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Seattle to Helsinki.
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Seattle to Helsinki.
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Everything you should know

Cheapest round-trip
$479
Overall average: $853
Scandinavian Airlines
Fri 2/27Wed 5/20
SEA - HEL • 2 stops
Cheapest one-way
$522
Typical prices: $497-$620
Multiple Airlines
Sat 1/3
SEA - HEL • 3 stops
Our travelers' advice
AI-generated summary based on content written by travel experts
Finnair's A350 offers higher humidity for comfort.
Economy Comfort on Finnair provides extra legroom.
Expert advice
Expert advice
Expert advice
Expert advice
Top airlines
Scandinavian Airlines
Cheapest • from $479 (round-trip)
Finnair
Best reviews • 7.6 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
When to book
2 weeks
in advance
Our data shows that travelers who book at least 2 weeks in advance save around 7% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
January
Cheapest • 35% price drop
June
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
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We hope you love your trip to Helsinki!
Flight Deals
Booking Insights
Expert advice
Flight Deals

Cheap Flights from Seattle to Helsinki (SEA-HEL)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Seattle to Helsinki 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 Seattle to Helsinki

Fri, Feb 27 - Wed, May 20
Scandinavian Airlines Logo
7:20 am - 10:40 amSEA-HEL
41h 20m2 stops
Scandinavian Airlines Logo
9:15 pm - 1:45 pmHEL-SEA
50h 30m2 stops
$479Scandinavian Airlines
Find Deal
Wed, Jan 21 - Sun, Feb 8
Scandinavian Airlines Logo
7:10 am - 8:20 pmSEA-HEL
27h 10m2 stops
Scandinavian Airlines Logo
9:00 pm - 11:23 pmHEL-SEA
36h 23m2 stops
$511Scandinavian Airlines
Find Deal
Wed, Jan 21 - Sun, Feb 8
Scandinavian Airlines Logo
7:10 am - 8:20 pmSEA-HEL
27h 10m2 stops
Scandinavian Airlines Logo
9:00 pm - 11:23 pmHEL-SEA
36h 23m2 stops
$512Scandinavian Airlines
Find Deal
Thu, Jan 22 - Thu, Feb 12
Scandinavian Airlines Logo
11:30 am - 3:25 pmSEA-HEL
17h 55m2 stops
Scandinavian Airlines Logo
11:20 am - 10:16 pmHEL-SEA
20h 56m2 stops
$537Scandinavian Airlines
Find Deal
Wed, Dec 31 - Fri, Jan 16
Scandinavian Airlines Logo
7:10 am - 3:25 pmSEA-HEL
22h 15m2 stops
Scandinavian Airlines Logo
11:20 am - 10:22 pmHEL-SEA
21h 02m2 stops
$540Scandinavian Airlines
Find Deal
Sun, Nov 9 - Mon, Nov 24
Icelandair Logo
2:35 pm - 12:55 pmSEA-HEL
12h 20m1 stop
Icelandair Logo
1:55 pm - 5:00 pmHEL-SEA
13h 05m1 stop
$639Icelandair
Find Deal
Thu, Jan 22 - Mon, Feb 9
Icelandair Logo
2:35 pm - 12:55 pmSEA-HEL
12h 20m1 stop
Icelandair Logo
1:55 pm - 5:00 pmHEL-SEA
13h 05m1 stop
$654Icelandair
Find Deal
Wed, Jan 7 - Sun, Jan 11
Icelandair Logo
2:35 pm - 12:55 pmSEA-HEL
12h 20m1 stop
Icelandair Logo
1:55 pm - 5:00 pmHEL-SEA
13h 05m1 stop
$658Icelandair
Find Deal
Fri, Feb 27 - Tue, May 12
Icelandair Logo
2:35 pm - 12:55 pmSEA-HEL
12h 20m1 stop
Icelandair Logo
3:00 pm - 5:50 pmHEL-SEA
12h 50m1 stop
$661Icelandair
Find Deal
Sun, Nov 9 - Mon, Nov 24
Multiple Airlines Logo
2:35 pm - 8:00 amSEA-HEL
31h 25m3 stops
Multiple Airlines Logo
7:00 am - 5:00 pmHEL-SEA
20h 00m2 stops
$693Multiple Airlines
Find Deal
Booking Insights

KAYAK's insights & trends for Seattle to Helsinki flights

Get data-powered insights and trends into flights from Seattle to Helsinki 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 Seattle to Helsinki?

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

For Seattle to Helsinki, Sunday is the cheapest day to fly on average and Tuesday is the most expensive. Flying from Helsinki back to Seattle, the best deals are generally found on Thursday, with Wednesday being the most expensive.

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Seattle to Helsinki, 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 Seattle to Helsinki is January, where tickets cost $539 (return) on average. On the other hand, the most expensive months are July and June, where the average cost of round-trip tickets is $1,112 and $1,106 respectively.

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

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Seattle to Helsinki, 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 Seattle to Helsinki, you should book around 2 weeks before departure, which saves you about 7% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 16 weeks before departure.

Expert advice

Expert advice for your flight from Seattle to Helsinki

 
Snippets provided in this section are AI-generated based on a summarization of KAYAK-commissioned articles. The articles are presented as-is, for general informational purposes only, and may not be up-to-date. The opinions contained in the articles are original to the author and reflect their authentic experience, which may vary significantly from the experience of others.
KAYAK teamed up with top travel experts to share the best tips for your journey.
Airlines
Finnair

Finnair's A350 features higher humidity, ensuring a more comfortable arrival.


Economy Comfort offers extra legroom for a small fee, enhancing long-haul comfort.

Read more about Finnairby Gabriel Leigh
American Airlines

Main Cabin Extra offers early boarding and complimentary drinks, ideal for long flights.


Premium Economy includes amenity kits and sleep sets, enhancing comfort on international flights.

Our travel experts
Gabriel Leigh

Gabriel Leigh

Expert on Finnair

Gabriel Leigh

Gabriel Leigh

Gabriel is a writer and video creator. As senior content producer for Flightradar24 and Monocle’s transport correspondent, he keeps a close eye on aviation in particular. He has also written travel articles for the likes of The New York Times. Born in New York but raised around the world, he now lives in Sweden. He’s been to 75 countries, flying 2.3 million miles on 113 airlines and through 234 airports in the process.

Read more
Harriet Baskas

Harriet Baskas

Expert on American Airlines

Harriet Baskas

Harriet Baskas

Harriet is an award-winning journalist who is happiest in an airport or an unusual museum. Her stories about airports, air travel, and the business of travel have appeared on NBC News, CNBC, USA TODAY, The Points Guy and other outlets. She is the creator of the StuckatTheAirport.com blog and the author of nine books. When not out on the road or exploring the latest airport amenities, she’s home in Seattle getting ready for the next adventure.

Read more

Good to know

Low seasonApril
Cheapest flight$479
Best time to beat the crowds but there is an average 4% increase in price.
Most popular time to fly with an average 34% increase in price.
Flight from Seattle to Helsinki

When to book flights from Seattle to Helsinki

Are your dates flexible? Find out the best times to travel from Seattle to Helsinki 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 Seattle to Helsinki

  • What is the cheapest flight from Seattle to Helsinki?

    In the last 3 days, the lowest price for a flight from Seattle to Helsinki was $522 for a one-way ticket and $479 for a round-trip.

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

    Yes, you’ll need a passport to travel to Helsinki from Seattle.

  • Which airlines offer Wi-Fi service onboard planes from Seattle to Helsinki?

    United Airlines, Lufthansa, KLM, and Asiana Airlines offer inflight Wi-Fi service on the Seattle to Helsinki flight route.

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

    The Airbus A350-900 is the aircraft model that flies most regularly on the Seattle to Helsinki flight route.

  • Which airline alliances offer flights from Seattle to Helsinki?

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

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

    The two airlines most popular with KAYAK users for flights from Seattle to Helsinki are KLM and Finnair. With an average price for the route of $910 and an overall rating of 7.7, KLM is the most popular choice. Finnair is also a great choice for the route, with an average price of $1,016 and an overall rating of 7.6.

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

    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 Seattle to Helsinki.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Helsinki from Seattle 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 Seattle to Helsinki?

    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 Helsinki with an airline and back to Seattle with another airline. Booking your flights between Seattle and HEL 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 Seattle to Helsinki?

    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 Helsinki from Seattle 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 Seattle to Helsinki

  • Looking for a cheap flight? 25% of our users found flights on this route for $744 or less one-way and $666 or less round-trip.

Reviews of the top 5 airlines serving from Seattle to Helsinki

 
See real verified KAYAK customer reviews for airlines flying from Seattle to Helsinki. 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 Seattle to Helsinki? 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 1333 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.

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.

No vegetarian option was provided for the regular meal or the pre-landing snack.

The Scandinavian flight was excellent, however the second flight was partnered with TAP Portugal which was not so good. crowded gate area with no chairs, delayed flight, bad boarding process, no entertainment system onboard, and the baggage didn’t get to the carousel until well over an hour which caused our taxi that was waiting to leave. Love SAS, hate TAP.

Great logistics and timeliness as we arrived quite early. Flight smooth and fast. Excellent entertainment. Plane itself was a bit tired and the crew mostly indifferent. Baggage took forever but that’s on CPH. Would use SAS again for sure.

Will not recommend SAS for business travel. Food was so-so. Service was very good. First leg was very good. Second leg from Copenhagen to Barcelona was terrible. We paid a LOT for business class and to have seats worse than most coach seats with no entertainment and no charging available for 1/3rd of the whole trip was not acceptable. Very disappointing. I thought they were coming back in the U.S. with style, NOT YET.

I do not have a problem with the airline but both my two suitcases that were supposed to go from Hawaii to Copenhagen didn’t get on the plane in Seattle. I arrive on Monday the 21st at 10:30 in the morning. I did not get my two suitcases before Friday late afternoon that is unacceptable.

No choice of food. Needed to pay more even for a can of coke!!!

The seats were really close together and hard to get comfortable. The food was okay. The cheese was amazing! I loved the cold towels they gave us.

When my flight was changed from delays they were quick to rebook me.

I really enjoyed how clean and big the aircraft was, as well as how friendly the crew was.

Airline left me stranded in the U.S. gave me an unrequested refund of 40% of booking and canceled my trip back! When I asked why, the said “we don’t have to tell you why”. “But you can rebook”. Never again! Paid 2x and rebooked on Austrian. What a joke!

The flight attendant, a black woman with curly hair who sat near Row 21, was wonderful and kind.

It was good..clean, comfy seat. Friendly warm welcoming crew. Was able to check my cabin luggage at the gate which I was able to pickup in a decent time from baggage claim. The app gave all updates from delays to baggage claim info. Overall smooth flight.

Flight was delayed leaving Dallas. Arrived about 2 hours later than scheduled.

Flight delayed and missed connection. Rescheduled flight cancelled after 6 hrs wait. Rerouted thru ORD, flight cancelled, overnight stay in ORD. Still in the air on new flight!

We are too tired and frustrated to comment politely at this point

Terrible. Our luggage was delayed and couldn’t be delivered for several days. We got bad information from the airline agents at baggage claim. We had to pick up our car so we wouldn’t be charged for an extra day. We got lost in the maze of airport parking. The baggage claim agents didn’t offer us any compensation for our extra time and expense. We are tired, hungry and very frustrated.

The flight was flawless and we even arrived between 20 and 25 minutes early!

The only thing to like was that we eventually got to our destination

Delayed delayed delayed and no offer for food or vouchers

Disliked having to wait a little longer to disembark from the plan when we landed in London

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.

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.

It was good. The air plane is clean and staff were friendly.

Worst airline I’ve ever flown. Delayed 5.5 hrs, missed connecting flight, and missed an entire day of vacation. Zero customer service

Everything sucked. No food, one small glass of water, a tiny coffee, 5.5 hour delay with no customer service. Would never recommend flying them.

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.

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.

I don't know about the others but the flight attendant that took care of us had the absolute wrong approach "how do we dare asking for water or anything else for that matter"

Flying on the Boeing 787 from Seattle to London was everything that I expected. Every thing was great.

Not my definition of first class. No leg room and barely any recline. The food was good. The crew was great. The comfort for the price I paid for London to Cairo was highway robbery. The Wi-Fi didn't work for me either.

Seat pitch is not enough to eat comfortably. When seat in front is reclined, your screen comes closer to your face. Ryanair seats are actually more comfortable.

The leg from Portland to Heathrow was great for a business class ticket. The BA leg from Heathrow to Lisbon was terrible. Basically coach seating with an empty seat between you and next passenger. Absolutely no leg room. Should not have been charged for business class and it was a 3 hour flight.

The flat beds. Other than that, the place was not clean.

Moved me away from my family and refused to fix it.

I have always been pleased with their service. Would not change a thing

Seating and food was the worst we have experienced in 35 years of traveling for both personal and busines .

Economy seats felt more cramped than other flights we have taken.7 hr, painful sitting hours 6 and 7. Web site difficult to deal with. Originally put in for 1 special meal due to type 2. Meal was awful. Tried to change selection to standard for return flight, on app and website, unable to complete that action.

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

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