SEA - HEL

$434 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 2/5. 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.
Travelers love KAYAK
41,299,237 searches in the past 7 days on KAYAK

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Everything you should know

Cheapest round-trip
$516
Typical prices: $607-$775
Multiple Airlines
dj. 1/29dj. 2/5
SEA - HEL • 2 stops
Cheapest non-stop
$1,291
Iberia
dt. 5/19dt. 6/2
SEA - HEL • Non-stop
Our travelers' advice
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
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 • 33% price drop
June
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
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

dj., gen. 29 - dj., febr. 5
Multiple Airlines Logo
2:35 pm - 3:25 pm
SEA
-
HEL
14h 50m2 stops
Multiple Airlines Logo
7:40 am - 5:00 pm
HEL
-
SEA
19h 20m2 stops
$516Multiple Airlines
dj., gen. 29 - dj., febr. 5
Multiple Airlines Logo
2:35 pm - 8:40 pm
SEA
-
HEL
20h 05m3 stops
Multiple Airlines Logo
7:40 am - 5:00 pm
HEL
-
SEA
19h 20m2 stops
$556Multiple Airlines
dt., març 10 - dt., març 17
Scandinavian Airlines Logo
1:45 pm - 3:25 pm
SEA
-
HEL
16h 40m2 stops
Scandinavian Airlines Logo
6:15 am - 9:48 pm
HEL
-
SEA
24h 33m2 stops
$613Scandinavian Airlines
dj., gen. 22 - dl., febr. 9
Scandinavian Airlines Logo
7:10 am - 1:35 am
SEA
-
HEL
32h 25m2 stops
Scandinavian Airlines Logo
9:00 pm - 10:25 pm
HEL
-
SEA
35h 25m2 stops
$621Scandinavian Airlines
dv., febr. 27 - dt., maig 12
Scandinavian Airlines Logo
7:10 am - 1:35 am
SEA
-
HEL
32h 25m2 stops
Scandinavian Airlines Logo
6:10 am - 12:22 am
HEL
-
SEA
28h 12m2 stops
$624Scandinavian Airlines
dt., abr. 21 - dg., maig 3
Scandinavian Airlines Logo
10:55 am - 10:35 am
SEA
-
HEL
37h 40m2 stops
Scandinavian Airlines Logo
4:00 pm - 11:35 pm
HEL
-
SEA
41h 35m2 stops
$627Scandinavian Airlines
dt., gen. 13 - dt., gen. 20
Scandinavian Airlines Logo
1:30 pm - 1:35 am
SEA
-
HEL
26h 05m2 stops
Scandinavian Airlines Logo
9:00 pm - 11:22 pm
HEL
-
SEA
36h 22m2 stops
$628Scandinavian Airlines
dj., gen. 29 - dj., febr. 5
Multiple Airlines Logo
2:35 pm - 12:30 am
SEA
-
HEL
23h 55m3 stops
Multiple Airlines Logo
5:30 am - 5:00 pm
HEL
-
SEA
21h 30m3 stops
$629Multiple Airlines
dc., gen. 21 - dg., febr. 8
Scandinavian Airlines Logo
11:17 am - 8:20 pm
SEA
-
HEL
23h 03m2 stops
Scandinavian Airlines Logo
11:20 am - 10:13 pm
HEL
-
SEA
20h 53m2 stops
$643Scandinavian Airlines
dv., febr. 27 - dt., maig 12
Scandinavian Airlines Logo
11:35 am - 3:25 pm
SEA
-
HEL
17h 50m2 stops
Scandinavian Airlines Logo
11:15 am - 10:17 pm
HEL
-
SEA
21h 02m2 stops
$646Scandinavian 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 January.

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, Monday 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 $543 (return) on average. On the other hand, the most expensive months are June and July, where the average cost of round-trip tickets is $1,104 and $1,094 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 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.
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.

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 seasonNovember
Cheapest flight$356
Best time to beat the crowds with an average 26% drop in price.
Most popular time to fly with an average 36% 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 $356 for a one-way ticket and $516 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?

    Lufthansa, United Airlines, 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?

    SkyTeam, and oneworld are the airline alliances operating flights between Seattle and Helsinki, with SkyTeam 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 $981 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 $544 or less one-way and $571 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 1338 reviews
8.1Crew
7.4Comfort
6.9Entertainment
7.6Boarding
6.7Food
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 2025
LHR - 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.

I was surprised how good an American airline can be - I was really impressed.

Excellent service throughout. Airport process is quick and easy. Very courteous staff. Great service in the plane! Just outstanding punctuality and service overall!!

I have paid for extra legroom on my flight. My seat was broken and did not recline. The crew could not fix it and refused to provide me with another seat

Over all experience was good. However the connection time was too short at CPG. We missed our connecting flight to AMS as the passport control line was too long and by the time we got our passport control done it was too late I wish there were some SAS staff to help us out at the passport control center Though they put us in a KLM flight from CPG to AMS, That flight was also delayed by over two hours

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!!!

Did not understand a single word the attendant said on the pa system. I was glad it was not an emergency.

Flight was late and boarding was confusing because gate changed and I didn’t get a notification

Gate was overcrowded. Gate agents performed very well. Flight crew was top notch! Efficient & professional & courteous. Both meals not thermalized well. Dinner main dish was actually cold in the center. Almost inedible. Breakfast sandwich was lukewarm.

The boarding was as always, the crew tried their best but not enough. The food was a disaster I had dietary restrictions that were half met because the company did not loaded the food for the flight. The entertainment screen was fine but content was not and also they removed the free messaging option from the flight and they charged 30 dollars for that crappy bandwidth. This flight is not worth the cost and the company is going down on quality.

Not comparable to Qatar Airways services on flights to Doha. Flight attendants provided basic services; I was never recognized by name or as an Executive Platinum member. Restrooms were not kept clean during the flight.

Awful. They won’t help me with anything. I booked on American but they abdicated to Iberia. The ticket was overpriced. Everything negative

it was fine, decent flight... dont get food besides cookies or pretzels so not sure why you ask about food. same for entertainment..

I got sick nothing contagious but distressing and the care I received by Kayla? Keighly the flight attendant will be memorable for ever. Thank You

I got sick nothing contagious but distressing enough and the care I received on the flight was astounding.

Waaay too small plane. They also need to up the size of the overhead bins. I would love to keep me 3k with of camera equipment in my hard case baggahe instead of it being thrown into the belly of the plane

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

The Experience Was Torture Spend a few extra dollars and avoid Icelandair at all costs. There is absolutely no refreshments, no food, no drinks. Only water, coffee, tea are free and at only half a tiny cup. Entertainment is limited selection of films, shows and mostly outdated. The seats are smaller than usual, with no cushion, no pillows, no blankets. First time in my life have I witness an airline asking for donations in spare change for a charity. With all the money Icelandair saves by starving the passenger, they can afford to give this charity on their own.

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.

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 cramped seats are cruel and unusual punishment and may violate the Geneva code.

Check in was was and the agent was very friendly and helpful The lounge was nice...boarding was straight from the lounge Everything worked at our seats, and video entertainment was good ..food was mediocre

The flight was excellent in World Travellor plus. Well worth the extra money. Boarding at Phoenix was the usual poorly organized event. Very stressful.

Although business class, the seating was really cramped. The food was so so.

Smooth trip no turbulence which is always a bonus for me lol! In cattle class so an element of being a bit squished (but not as bad as other shorter haul airlines) smaller plane than the one we flew out on and entertainment system wasn’t as modern but still definitely passed the time. Lovely crew x

I was attacked in the Miami airport and the staff did nothing. On my flight from London to Miami one of the flight attendants screamed at me and demanded I keep my seat in the upright position at all times during the fight so the man behind me was comfortable for the flight. I will never in my life use British airways again

Airlines have to stop assuming passengers bring entertainment. Provide it like you used to in business class and above!! N

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.

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

Information on your arrival and departure airports