SEA - HEL

$314 Find Cheap Flights from Seattle to Helsinki

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Seattle to Helsinki departing on 6/29. 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
$568
Typical prices: $969-$481
Multiple Airlines
Thu 8/13Thu 8/20
SEA - HEL • 2 stops
Cheapest non-stop
$1,024
Finnair
Tue 6/16Fri 9/11
SEA - HEL • Non-stop
Advice from real travelers
AI-powered summary based on content written by travel experts. AI can make mistakes.
Finnair's A350 offers higher humidity for comfort.
Economy Comfort on Finnair provides extra legroom.
Expert advice
Expert advice
Expert advice
Expert advice
Nonstop flights
Tue, Fri, Sun
You can fly direct with Finnair. Average duration is 9h 30m
Direct flights
Direct flights
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Direct flights
Direct flights
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Top airlines
Cheapest • from $742 (round-trip)
Best reviews • 7.6 score
Airline reviews
Airline reviews
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Airline reviews
Airline reviews
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Top layover airports
Cheapest • Avg $700 (round-trip)
Shortest trip • 13h 36m (one-way)
Insights
Insights
Insights
Insights
When to book
in advance
Our data shows that travelers who book at least 3 weeks in advance save around 15% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
Cheapest • 34% price drop
Most popular
Good to know
Good to know
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Start a new search
KAYAK searches 100s of sites at once to find you the best travel deals.
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

Thu, Aug 13 - Thu, Aug 20
Multiple Airlines Logo
8:00 am - 4:40 pm
SEA
-
HEL
22h 40m
2 stops
Multiple Airlines Logo
8:30 am - 10:07 am
HEL
-
SEA
35h 37m
3 stops
$568Multiple Airlines
Thu, Aug 13 - Thu, Aug 20
Multiple Airlines Logo
8:00 am - 10:35 pm
SEA
-
HEL
28h 35m
2 stops
Multiple Airlines Logo
8:30 am - 9:07 pm
HEL
-
SEA
22h 37m
2 stops
$569Multiple Airlines
Mon, Aug 17 - Mon, Aug 31
Multiple Airlines Logo
3:40 pm - 6:20 pm
SEA
-
HEL
16h 40m
2 stops
Multiple Airlines Logo
7:05 am - 8:40 pm
HEL
-
SEA
23h 35m
2 stops
$634Multiple Airlines
Thu, Aug 13 - Thu, Aug 20
Multiple Airlines Logo
8:00 am - 8:40 pm
SEA
-
HEL
26h 40m
3 stops
Multiple Airlines Logo
11:05 am - 10:48 pm
HEL
-
SEA
21h 43m
3 stops
$640Multiple Airlines
Wed, May 27 - Wed, Jun 3
Multiple Airlines Logo
8:00 am - 12:05 am
SEA
-
HEL
30h 05m
3 stops
Multiple Airlines Logo
7:05 am - 4:59 pm
HEL
-
SEA
19h 54m
2 stops
$691Multiple Airlines
Wed, May 27 - Wed, Jun 3
Multiple Airlines Logo
3:40 pm - 12:05 am
SEA
-
HEL
22h 25m
2 stops
Multiple Airlines Logo
7:05 am - 5:55 pm
HEL
-
SEA
20h 50m
2 stops
$709Multiple Airlines
Wed, May 27 - Wed, Jun 3
Multiple Airlines Logo
8:00 am - 12:05 am
SEA
-
HEL
30h 05m
3 stops
Multiple Airlines Logo
5:30 am - 4:59 pm
HEL
-
SEA
21h 29m
3 stops
$730Multiple Airlines
Sun, Sep 27 - Thu, Oct 1
Scandinavian Airlines Logo
3:55 pm - 10:35 am
SEA
-
HEL
32h 40m
1 stop
Scandinavian Airlines Logo
4:00 pm - 1:45 pm
HEL
-
SEA
31h 45m
1 stop
$742Scandinavian Airlines
Mon, May 25 - Mon, Jun 1
Multiple Airlines Logo
7:00 pm - 8:35 pm
SEA
-
HEL
15h 35m
2 stops
Multiple Airlines Logo
7:15 am - 8:40 pm
HEL
-
SEA
23h 25m
2 stops
$783Multiple Airlines
Thu, Jun 4 - Wed, Jun 17
Multiple Airlines Logo
7:00 pm - 8:20 am
SEA
-
HEL
27h 20m
3 stops
Multiple Airlines Logo
5:30 am - 8:40 pm
HEL
-
SEA
25h 10m
3 stops
$784Multiple Airlines
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.

How much is a round-trip flight from Seattle to Helsinki?

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from Seattle to Helsinki departing in August.

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, Wednesday is the cheapest day to fly on average and Sunday is the most expensive. Flying from Helsinki back to Seattle, the best deals are generally found on Saturday, 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 June and July, where the average cost of round-trip tickets is $1,182 and $941 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 3 weeks before departure, which saves you about 15% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 13 weeks before departure.

Expert advice

Expert advice for your flight from Seattle to Helsinki

 
AI-powered summary based on content written by travel experts. AI can make mistakes.
KAYAK teamed up with top travel experts to share the best tips for your journey.
Our travel experts
Gabriel Leigh

Gabriel Leigh

Expert on Finnair

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.

Harriet Baskas

Harriet Baskas

Expert on American Airlines

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.

Good to know

Low seasonFebruary
Cheapest flight$314
Best time to beat the crowds with an average 3% drop in price.
Most popular time to fly and prices are also 3% lower on average.
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

  • How many flights are there between Seattle and Helsinki per day?

    There is a maximum of 1 nonstop flight a day that takes off from Seattle and lands in Helsinki, with an average flight time of 9h 30m. The most common departure time is 5:00 pm and most flights take off in the afternoon. Each week, there are 3 flights.

  • 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 $314 for a one-way ticket and $568 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?

    Only Asiana Airlines offers inflight Wi-Fi service on the Seattle to Helsinki flight route.

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

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

  • Which airline alliances offer flights from Seattle to Helsinki?

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

  • On which days can I fly direct from Seattle to Helsinki?

    You can catch a nonstop flight from Seattle to Helsinki on on Tuesday, Friday, and Sunday.

  • 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 $1,056 and an overall rating of 7.8, KLM is the most popular choice. Finnair is also a great choice for the route, with an average price of $1,107 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.

  • Which airlines provide the cheapest flights from Seattle to Helsinki?

    In the past 3 days, the cheapest round-trip tickets from Seattle to Helsinki were found on Scandinavian Airlines ($742) and Icelandair ($795).

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 $425 or less one-way and $1,112 or less round-trip.

Prefer to fly direct from Seattle to Helsinki?

 
Direct data is based off flight results for the next 60 days. Find direct flights from all airlines flying direct from Seattle/Tacoma Intl to Helsinki-Vantaa.
Find which airlines fly direct from Seattle/Tacoma Intl Airport to Helsinki-Vantaa Airport, which days they fly and book direct flights.

Direct departures

Seattle/Tacoma Intl to Helsinki-Vantaa

Tuesday

Finnair

Finnair

Friday

Finnair

Finnair

Sunday

Finnair

Finnair

See more direct flights

Direct returns

Helsinki-Vantaa to Seattle/Tacoma Intl

Tuesday

Finnair

Finnair

Friday

Finnair

Finnair

Sunday

Finnair

Finnair

See more direct flights

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 1392 reviews
6.9Entertainment
6.7Food
8.2Crew
7.7Boarding
7.4Comfort
Airline reviews

Rude Iberia security crew at the Madrid terminal. No Iberia officials to be found to redress complaints at the gate. No supervisors. Nothing for processing upgrades at the gate Iberia app did not work to let me upgrade my options to higher classes. No water was offered on a hot day in Madrid. Madrid airport air conditioning was so weak that people were sweating. Never book on any airlines that codeshare with Iberia.

2.0 MediocreShiva, Apr 2026
MAD - EWR
Read more Finnair reviews

Rude Iberia security crew at the Madrid terminal. No Iberia officials to be found to redress complaints at the gate. No supervisors. Nothing for processing upgrades at the gate Iberia app did not work to let me upgrade my options to higher classes. No water was offered on a hot day in Madrid. Madrid airport air conditioning was so weak that people were sweating. Never book on any airlines that codeshare with Iberia.

Comfort. Not good very little space after the person in front of you lay back.

On a more than 8 hours flight was only one meal included, which I have never experienced before. Always two meals on the overseas flight. It was very weird.

Great if not for the boarding by bus at Heathrow terminal 3. Medieval disappointing time-consuming and very hard on handicapped flyers. It was awful

Positive: It was refreshingly easy and polite check-in and boarding staff. Flight was on time and Helsinki is a very well-signposted airport. Shopping was nice as well. Flight was not full and I had lots of space in economy. Flight was perfectly on time. Negative: Food and drink not very good, but that it is normal on any airline. Didn't expect anything else.

Business seating is soooo uncomfortable. You can sit straight up or lay down. You need pillows behind you because the back doesn’t lay down. Those are need to “prop” you up. The chair has no padding whatsoever. Food was gross. I’ve eaten on Finnair before and the food was exceptional. This time it gave 2 people in our party diarrhea. It was the chicken dish. I took 2 bites and didn’t eat anything more. The flight attendants were nice. You needed an additional lounge in Terminal D at DFW Airport. After waiting 40 minutes to enter, we finally gave up and went to a bar across from the club doors. I’m unsure if I’ll ever book a Finnair flight again.

It was a good flight, very comfortable seats for sleeping in business class. Probably the most comfortable business class seat I've ever had (20+ times in business class on various airlines). Service was good, but the only downside is my screen didn't work and it had to be reset multiple times to get it to shut off. I had to block my eyes because the screen was white almost the entire flight and I wore an eye mask when I slept. But when eating and reading in my seat, my eyes hurt because the only way to turn the screen off was reset it and the screen would only be off for a few minutes at a time.

Everything was wonderful! AirBus seats are more comfortable to sleep in as compared to the Boeing planes.

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

The stewardess was incredibly rude. The gave you only one drink with dinner.

Cancelled flight, wasn't refunded paid selected seats. Poor customer service. Called airline and they didn't realize the flight was cancelled until several hours after the email notice was sent.

The worst with the trip was the space in economy, my knees are still hurting. There was no way to control personal air by turning a knob above you, it was way to hot on both rides. During the night flight they allowed 2 people from across the aile which was narrow to sit and talk for 7 hours while also using tablets and the flashlight from their phones pointing into the row where I sat at times. They allowed people with way too large baggage to bring onboard. I paid way too much for the ticket ($1,364} for economy. Kayak misinformed me to get cancellation insurance that was only valid for a very short time (less than 12 hours) and was over one hundred dollars. Hotel booking was incorrect, I had the room booked myself at the hotel, only double or larger rooms available which I paid over 400 dollars for. I will never fly with SAS again unless there is no other alternative.

Crew members were excellent. The seat wasn’t the best as well as a food options.

5 of my 7 pieces of luggage are missing and they cant call to find out where it is. I have to fill out a form and wait for them to mail it to me in several days (if they find it). That does not work for my travel itinerary. I need my full ticket cost refunded please.

Fantastic. The only thing - out of my six luggage one was lost in Copenhagen, however it was delivered Home 3 Days later so all great..

The crew was friendly, the flight was pleasant. Thank you for your service!

Our trip plan from Kayak stated we were flying SAS. That was not true. The first leg was a Delta flight. We wasted 25 minutes before finding out to check in with the correct airline. Then our SAS flight for the second leg arrived 25 minutes late, and our third leg flight with SAS closed the gate knowing the flight delay was SAS’s fault, and that this flight would only be backed up 5 minutes. The final kicker was that between Delta and SAS, they lost all our checked luggage.

Flight was completely full January 9th? I problem i had the stewardess was bumping into me constantly walking by? very annoying.. on Austrian air I dint have this issue at all...

Amazing! Everyone was so nice and the food was so good!!

Left early arrived early..right amount of talking from pilots..of course had to love the biscuit and water!

I would like a refund for the extra cost the seat I paid for. An oversized person sat next to me and I couldn’t fit on my seat and had to move to another seat.

Boarding gate at LAX was too crowded—two gates next to one another

The flight was delayed about an hour for a maintenance specialist to approve the maintenance repair

This flight was delayed but it worked in my favor because my Atlanta to Dallas flight was delayed.

This was a hard flight. 3 delays out of OKC (1 on the Tarmac). Delay in Atlanta coming to Dallas. total travel time was the equivalent of driving from OKC to Atlanta.

Like: flights are on time, good boarding process Can improve: planes are old, improve entertainment and make space more comfortable

Had to wait for a gate for a long time, then waited on the run way for a long time before leaving. The actual flights part was good.

The airplane was an old model, the overhead didn’t have enough room for people’s items and made boarding and boarding disappointing and stressful. Crew allowed passengers to bring more than the permitted baggage sizes.

Flying in the United States with the major airlines has become so underwhelming. A 2-3hr flight in most other parts of the world with the major carriers of the area comes with newer, CLEANER aircraft and significantly better in flight service in terms of both staff attitude and a actual meal service.

The Icelandair crew was so kind!!! Thank you for making my first trip to Paris a great one!

I had no idea that my ticket only paid for my right to get on the plane. They charged me $130 for my carry-on bag because it was 1 inch too big she claimed but it wasn’t! Then they wanted another fee for everything. I had no idea that Icelandair had changed to such a bargain basement airline. I was very disappointed.

Second time with Saga Premium, everything was fab, but the entertainment centre on both my flights didn't work, plus the seat on the NY to Rek flight (Airbus) was so solid and so uncomfortable. The 737Max flight's seat was much, much better.

I’m considering never flying with Iceland Air again. The seats in economy are torture. Now you only get water, coffee and tea for free- really? No food, not a single peanut. The passport line was insane, everyone was worried about catching their connecting flight. This was the third time I’ve barely made my connection, had to run. It can’t be that my choice is to use the bathroom (during the 50 minutes between flights) or make my flight. SO stressful! Ugh.

Nice, quick flight. There were lots of empty seats so they told me I could sit next to the emergency exit where I would have more legroom.

The staff was kind and helpful. There was no food, and you needed to bring your own earphones to use the entertainment, which I didn’t know.

They wouldn’t check in my luggage even though I had one checked bag prepaid. So I took my bag to the gate and tried to check it in there and two employees scolded me for bringing a large bag to the gate. I told them I was trying to check it in and that it was prepaid, and they said they couldn’t guarantee that it would arrive at my destination but they finally let me drop it off when boarding the plane and pick it up right after exiting the plane. There was no food, and there was no entertainment.

Delays at check-in, seemed like they were short ground staff at the time and some passengers needed extra processing.

Problems checking in both on the laptop and on the app. No free seating available at check-in as advertised - must pay for EVERY seat between $23 and $75. No way to cancel seat choice. App menus and site menus are not responsive, and some items are impossible to find. Crew and mobile assistance are friendly and helpful.

Food - Non-Existent. You pay for everything. It is strictly Pay-to-Play!

Boarding was orderly, pilot and flight attendants were nice, entertainment options were good, and low sodium meals were quite tasty.

The whole experience was excellent, O can say out from Miami the best airline to travel with for any European destination. Since the ground staff to the inflight crew attention was great, service on board 10 of 10. Finally the 380 is very confortable and nice to travel.

All crew except 1 were excellent. When I asked assistance with business class seat conversion to a bed (not being familiar as never used before but have numerous times with other airlines) crew member helped very reluctantly. I should have told her that business class seat conversion is totally different in each airline such as Delta, New Zealand Air and United. Sorry it was my 1st time with America Airlines. Now I know, I won't bother asking assistance in future.

1st class seats NOT REALLY 1st class or business class but like premier economy. Should be listed as such or named something else. I have flown 1st class with other airlines and they are nothing like it at all.

The seats in Premier Economy were very comfortable. The food was better than average. The way British Airways handled our seating was atrocious.

Worst airline in the world. They downgraded me from business class to economy with no compensation.

Flight delayed, connection was not at gate listed and so missed, staff were rude at Heathrow, phone tree stupid and difficult, took me 21 actual hours to reach my destination. Almost lost my hotel reservation after walking in a strange city alone after midnight because they would not put me up in a hotel at sfo or heathrow. I will never fly BA again and will tell all people and Instagram followers never to fly BA.

Overall ok. Best part has always been the sundae dessert.

Check-in in SAN was long. ORD was good. Flight delayed On board crew was ok. No warmth or personality. LHrR barely made connection

Even if you wait for connecting passengers you should not be an hour late departing waiting their luggage. Your passengers may have connections in the other end and you harm them.

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

Information on your arrival and departure airports