HEL - SEA

$399 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 4/27. 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 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
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
$722
Overall average: $719
Multiple Airlines
Mon 3/2Mon 3/16
HEL - SEA • 3 stops
Cheapest one-way
$399
Typical prices: $709-$854
Multiple Airlines
Mon 4/27
HEL - SEA • 2 stops
When to book
3 weeks
in advance
Our data shows that travelers who book at least 3 weeks in advance save around 20% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
March
Cheapest • 18% 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

Mon, Mar 2 - Mon, Mar 16
Multiple Airlines Logo
5:30 am - 5:00 pm
HEL
-
SEA
21h 30m3 stops
Multiple Airlines Logo
3:35 pm - 10:35 am
SEA
-
HEL
34h 00m3 stops
$722Multiple Airlines
Mon, Mar 2 - Mon, Mar 16
Multiple Airlines Logo
9:10 am - 5:00 pm
HEL
-
SEA
17h 50m2 stops
Multiple Airlines Logo
3:35 pm - 10:25 pm
SEA
-
HEL
21h 50m3 stops
$725Multiple Airlines
Thu, Feb 5 - Wed, Feb 18
Multiple Airlines Logo
4:05 pm - 5:00 pm
HEL
-
SEA
34h 55m2 stops
Multiple Airlines Logo
2:35 pm - 1:35 am
SEA
-
HEL
25h 00m2 stops
$729Multiple Airlines
Thu, Feb 5 - Wed, Feb 18
Multiple Airlines Logo
5:30 am - 5:00 pm
HEL
-
SEA
21h 30m3 stops
Multiple Airlines Logo
2:35 pm - 1:35 am
SEA
-
HEL
25h 00m2 stops
$749Multiple Airlines
Mon, Mar 2 - Mon, Mar 16
Turkish Airlines Logo
12:30 pm - 5:05 pm
HEL
-
SEA
38h 35m1 stop
Turkish Airlines Logo
8:00 pm - 6:05 pm
SEA
-
HEL
37h 05m1 stop
$775Turkish Airlines
Mon, Mar 2 - Mon, Mar 16
Multiple Airlines Logo
11:20 pm - 5:00 pm
HEL
-
SEA
27h 40m2 stops
Multiple Airlines Logo
11:08 pm - 12:55 pm
SEA
-
HEL
28h 47m2 stops
$780Multiple Airlines
Mon, Mar 2 - Mon, Mar 16
Multiple Airlines Logo
11:20 pm - 5:00 pm
HEL
-
SEA
27h 40m2 stops
Multiple Airlines Logo
11:08 pm - 12:55 pm
SEA
-
HEL
28h 47m2 stops
$786Multiple Airlines
Mon, Mar 2 - Mon, Mar 16
Turkish Airlines Logo
12:30 pm - 5:05 pm
HEL
-
SEA
38h 35m1 stop
Turkish Airlines Logo
8:00 pm - 6:05 pm
SEA
-
HEL
37h 05m1 stop
$794Turkish Airlines
Wed, Feb 4 - Mon, Feb 16
Turkish Airlines Logo
12:30 pm - 5:05 pm
HEL
-
SEA
38h 35m1 stop
Turkish Airlines Logo
7:00 pm - 6:05 pm
SEA
-
HEL
37h 05m1 stop
$817Turkish Airlines
Mon, Mar 2 - Mon, Mar 16
Turkish Airlines Logo
12:30 pm - 5:05 pm
HEL
-
SEA
38h 35m1 stop
Turkish Airlines Logo
8:00 pm - 6:05 pm
SEA
-
HEL
37h 05m1 stop
$818Turkish Airlines
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 Monday 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 $719 (return) on average. On the other hand, the most expensive months are December and January, where the average cost of round-trip tickets is $1,067 and $987 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 $1,261, 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 3 weeks before departure, which saves you about 20% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 13 weeks before departure.

Good to know

Low seasonNovember
Cheapest flight$399
Best time to beat the crowds with an average 9% drop in price.
Most popular time to fly with an average 10% 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 $399 for a one-way ticket and $722 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.

  • 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 airline 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.
7.1
IcelandairOverall score based on 593 reviews
8.0Crew
6.2Food
7.2Boarding
6.9Comfort
7.0Entertainment
Airline reviews

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.

8.0 ExcellentDetlef, Dec 2025
DEN - BER
Read more Icelandair reviews

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.

Again, we paid $ 328.00 for specific seats are were assigned those seats.

Never again. Terrible hospitality and human decency for an international flight. No food, no snacks, no beverages, blankets, pillows, limited entertainment. Tiny seats without any cushion and some do not even recline. I was shocked that they did not charge for seat belts. Never in my life have I witness asking for "spare change" for charity before landing on both legs of the flight. Icelandair can contribute on their own to said, so called, children's charity with the money saved from providing 3 centimeters of tea and water to hungry and dehydrated passengers.

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

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

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.

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

Information on your arrival and departure airports