Which layover airport has the shortest travel time from Seattle to Helsinki?

Flights connecting via Reykjavik (KEF) have the shortest average one-way travel time: 14h 58m.

Which layover airport offers the lowest fares from Seattle to Helsinki?

Flights via Copenhagen (CPH) offer the lowest average round-trip price of $333.

What is the cheapest airline that flies from Seattle/Tacoma Intl to Helsinki-Vantaa?

Scandinavian Airlines and Icelandair are the most popular carriers operating from Seattle/Tacoma Intl to Helsinki-Vantaa

Which layover airport has the shortest connection time from Seattle to Helsinki?

Reykjavik (KEF) has the shortest average layover time for this route: 2h 40m.

What airlines fly to Helsinki?

Icelandair, Scandinavian Airlines and Finnair are the top three most popular airlines that fly to Helsinki from Seattle according to our data. Icelandair is the first choice among our users, with 57% of people opting to fly with this airline when traveling to Helsinki. Keep in mind that there are 4 different airlines that fly to Helsinki on a routine basis, so you have a few additional options to choose from.

Which airport is the most popular layover for flights between Seattle and Helsinki?

Reykjavik (KEF) was the most common stop: 78% of momondo users choosing 1-stop flights on this route connected there.

When did momondo last update prices for flights from Seattle/Tacoma Intl Airport to Helsinki-Vantaa Airport?

Prices for flights from Seattle/Tacoma Intl Airport to Helsinki-Vantaa Airport are refreshed on a daily basis.

How many operators does momondo search for flights from Seattle/Tacoma Intl Airport to Helsinki-Vantaa Airport?

As of September 2026, there are 4 operators available to choose from for flights from Seattle/Tacoma Intl Airport to Helsinki-Vantaa Airport.

How old do you have to be to fly from Seattle/Tacoma Intl Airport to Helsinki-Vantaa Airport?

The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Seattle/Tacoma Intl Airport to Helsinki-Vantaa Airport.

What documentation or ID do you need to fly to Helsinki-Vantaa Airport?

The necessary travel and health documents for your Helsinki-Vantaa Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

$260 Cheap Flights from Seattle to Helsinki in 2026/27

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Seattle to Helsinki

Round-trip

One-way

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Cheap round-trip flights

Enter your travel dates to find the best prices.

2:35 pm - 10:25 pmSEA Seattle/Tacoma Intl-HEL Helsinki-Vantaa

21h 50m2 stops Reykjavik Keflavik Intl Stockholm Arlanda

10:00 am - 5:00 pmHEL Helsinki-Vantaa-SEA Seattle/Tacoma Intl

17h 00m2 stops Stockholm Arlanda Reykjavik Keflavik Intl

$655Multiple Airlines

Tue, Nov 17 - Sun, Nov 22

2:35 pm - 10:25 pmSEA Seattle/Tacoma Intl-HEL Helsinki-Vantaa

21h 50m2 stops Reykjavik Keflavik Intl Stockholm Arlanda

9:35 pm - 5:00 pmHEL Helsinki-Vantaa-SEA Seattle/Tacoma Intl

29h 25m3 stops Riga Intl Stockholm Arlanda Reykjavik Keflavik Intl

$660Multiple Airlines

Tue, Nov 17 - Sun, Nov 22

3:55 pm - 1:30 amSEA Seattle/Tacoma Intl-HEL Helsinki-Vantaa

23h 35m1 stop Kastrup Copenhagen

9:05 pm - 1:45 pmHEL Helsinki-Vantaa-SEA Seattle/Tacoma Intl

26h 40m1 stop Kastrup Copenhagen

$690Scandinavian Airlines

Sun, Sep 27 - Sat, Oct 10

7:00 pm - 10:55 pmSEA Seattle/Tacoma Intl-HEL Helsinki-Vantaa

17h 55m1 stop Reykjavik Keflavik Intl

3:00 pm - 8:40 pmHEL Helsinki-Vantaa-SEA Seattle/Tacoma Intl

15h 40m1 stop Reykjavik Keflavik Intl

$696Icelandair

Fri, Oct 16 - Fri, Oct 23

2:35 pm - 1:00 pmSEA Seattle/Tacoma Intl-HEL Helsinki-Vantaa

12h 25m1 stop Reykjavik Keflavik Intl

2:00 pm - 5:00 pmHEL Helsinki-Vantaa-SEA Seattle/Tacoma Intl

13h 00m1 stop Reykjavik Keflavik Intl

$711Icelandair

Wed, Jan 20 - Wed, Jan 27

3:55 pm - 3:45 pmSEA Seattle/Tacoma Intl-HEL Helsinki-Vantaa

37h 50m2 stops Kastrup Copenhagen Stockholm Arlanda

9:05 pm - 1:45 pmHEL Helsinki-Vantaa-SEA Seattle/Tacoma Intl

26h 40m1 stop Kastrup Copenhagen

$723Scandinavian Airlines

Sun, Sep 27 - Sat, Oct 10

5:40 pm - 1:10 pmSEA Seattle/Tacoma Intl-HEL Helsinki-Vantaa

9h 30mnonstop

7:35 pm - 11:25 amHEL Helsinki-Vantaa-SEA Seattle/Tacoma Intl

25h 50m1 stop London Heathrow

$875Finnair

Mon, Sep 28 - Mon, Nov 30

3:25 pm - 4:40 pmSEA Seattle/Tacoma Intl-HEL Helsinki-Vantaa

15h 15m1 stop Paris Charles de Gaulle

2:05 pm - 11:47 amHEL Helsinki-Vantaa-SEA Seattle/Tacoma Intl

31h 42m1 stop Amsterdam Schiphol

$907Delta

Mon, Nov 9 - Mon, Nov 16

4:05 pm - 4:40 pmSEA Seattle/Tacoma Intl-HEL Helsinki-Vantaa

14h 35m1 stop Paris Charles de Gaulle

2:05 pm - 11:47 amHEL Helsinki-Vantaa-SEA Seattle/Tacoma Intl

31h 42m1 stop Amsterdam Schiphol

$907Delta

Tue, Nov 10 - Mon, Nov 16

10:27 am - 11:40 amSEA Seattle/Tacoma Intl-HEL Helsinki-Vantaa

15h 13m1 stop Dallas/Fort Worth

7:35 pm - 11:25 amHEL Helsinki-Vantaa-SEA Seattle/Tacoma Intl

25h 50m1 stop London Heathrow

$911Finnair

Mon, Nov 2 - Mon, Nov 30

Cheap last minute flights

Enter your travel dates to find the best prices.

6:50 pm - 1:35 amSEA Seattle/Tacoma Intl-HEL Helsinki-Vantaa

20h 45m1 stop Munich Franz Josef Strauss

7:40 pm - 4:59 pmHEL Helsinki-Vantaa-SEA Seattle/Tacoma Intl

31h 19m1 stop Munich Franz Josef Strauss

$880Lufthansa

Sun, Sep 20 - Mon, Sep 28

6:50 pm - 1:35 amSEA Seattle/Tacoma Intl-HEL Helsinki-Vantaa

20h 45m1 stop Munich Franz Josef Strauss

7:40 pm - 10:47 pmHEL Helsinki-Vantaa-SEA Seattle/Tacoma Intl

37h 07m2 stops Munich Franz Josef Strauss Vancouver Intl

$884Multiple Airlines

Sun, Sep 20 - Mon, Sep 28

7:00 pm - 9:20 pmSEA Seattle/Tacoma Intl-HEL Helsinki-Vantaa

16h 20m2 stops Reykjavik Keflavik Intl Stockholm Arlanda

9:05 pm - 8:40 pmHEL Helsinki-Vantaa-SEA Seattle/Tacoma Intl

33h 35m3 stops Kastrup Copenhagen Stockholm Arlanda Reykjavik Keflavik Intl

$889Multiple Airlines

Sun, Sep 20 - Mon, Sep 28

3:40 pm - 8:20 amSEA Seattle/Tacoma Intl-HEL Helsinki-Vantaa

30h 40m3 stops Reykjavik Keflavik Intl Stockholm Arlanda Riga Intl

9:05 pm - 8:40 pmHEL Helsinki-Vantaa-SEA Seattle/Tacoma Intl

33h 35m3 stops Kastrup Copenhagen Stockholm Arlanda Reykjavik Keflavik Intl

$900Multiple Airlines

Sun, Sep 20 - Mon, Sep 28

11:08 pm - 3:20 pmSEA Seattle/Tacoma Intl-HEL Helsinki-Vantaa

30h 12m2 stops Boston Logan Intl Kastrup Copenhagen

9:15 pm - 1:45 pmHEL Helsinki-Vantaa-SEA Seattle/Tacoma Intl

26h 30m2 stops Stockholm Arlanda Kastrup Copenhagen

$938Scandinavian Airlines

Mon, Sep 21 - Mon, Sep 28

10:55 am - 4:40 pmSEA Seattle/Tacoma Intl-HEL Helsinki-Vantaa

19h 45m2 stops San Francisco Paris Charles de Gaulle

7:00 am - 11:47 amHEL Helsinki-Vantaa-SEA Seattle/Tacoma Intl

14h 47m1 stop Amsterdam Schiphol

$961Delta

Mon, Sep 21 - Mon, Sep 28

11:08 pm - 10:35 amSEA Seattle/Tacoma Intl-HEL Helsinki-Vantaa

25h 27m2 stops Boston Logan Intl Kastrup Copenhagen

7:10 am - 1:45 pmHEL Helsinki-Vantaa-SEA Seattle/Tacoma Intl

16h 35m2 stops Stockholm Arlanda Kastrup Copenhagen

$985Scandinavian Airlines

Sat, Sep 19 - Sat, Sep 26

7:00 pm - 10:55 pmSEA Seattle/Tacoma Intl-HEL Helsinki-Vantaa

17h 55m1 stop Reykjavik Keflavik Intl

3:00 pm - 5:55 pmHEL Helsinki-Vantaa-SEA Seattle/Tacoma Intl

12h 55m1 stop Reykjavik Keflavik Intl

$1,080Icelandair

Fri, Sep 18 - Wed, Sep 30

1:50 pm - 5:40 pmSEA Seattle/Tacoma Intl-HEL Helsinki-Vantaa

17h 50m1 stop Amsterdam Schiphol

1:55 pm - 11:47 amHEL Helsinki-Vantaa-SEA Seattle/Tacoma Intl

31h 52m1 stop Amsterdam Schiphol

$1,135Delta

Fri, Sep 18 - Mon, Sep 28

7:15 am - 4:40 pmSEA Seattle/Tacoma Intl-HEL Helsinki-Vantaa

23h 25m2 stops New York John F Kennedy Intl Paris Charles de Gaulle

7:00 am - 4:35 pmHEL Helsinki-Vantaa-SEA Seattle/Tacoma Intl

19h 35m1 stop Amsterdam Schiphol

$1,135Delta

Fri, Sep 18 - Mon, Sep 28

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Scandinavian Airlines flights from Seattle to Helsinki

Our best Scandinavian Airlines deals on Seattle to Helsinki flight tickets

Scandinavian Airlines

Sep 27

SEA3:55 pmSeattle/Tacoma Intl

23h 35m

1 stop

HEL1:30 amHelsinki-Vantaa

Oct 10

HEL9:05 pmHelsinki-Vantaa

26h 40m

1 stop

SEA1:45 pmSeattle/Tacoma Intl

$690

Scandinavian Airlines

Sep 27

SEA3:55 pmSeattle/Tacoma Intl

37h 50m

2 stops

HEL3:45 pmHelsinki-Vantaa

Oct 10

HEL9:05 pmHelsinki-Vantaa

26h 40m

1 stop

SEA1:45 pmSeattle/Tacoma Intl

$723

Scandinavian Airlines

Oct 4

SEA3:55 pmSeattle/Tacoma Intl

32h 40m

1 stop

HEL10:35 amHelsinki-Vantaa

Oct 21

HEL6:10 amHelsinki-Vantaa

26h 54m

2 stops

SEA11:04 pmSeattle/Tacoma Intl

$772

Lufthansa flights from Seattle to Helsinki

Our best Lufthansa deals on Seattle to Helsinki flight tickets

Lufthansa

Oct 7

SEA6:50 pmSeattle/Tacoma Intl

20h 45m

1 stop

HEL1:35 amHelsinki-Vantaa

Oct 15

HEL6:35 amHelsinki-Vantaa

15h 45m

1 stop

SEA12:20 pmSeattle/Tacoma Intl

$868

Lufthansa

Oct 4

SEA6:50 pmSeattle/Tacoma Intl

20h 45m

1 stop

HEL1:35 amHelsinki-Vantaa

Oct 21

HEL6:35 amHelsinki-Vantaa

15h 45m

1 stop

SEA12:20 pmSeattle/Tacoma Intl

$869

Lufthansa

Sep 20

SEA6:50 pmSeattle/Tacoma Intl

20h 45m

1 stop

HEL1:35 amHelsinki-Vantaa

Sep 28

HEL7:40 pmHelsinki-Vantaa

31h 19m

1 stop

SEA4:59 pmSeattle/Tacoma Intl

$880

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

SeattleHelsinki

SEA Seattle/Tacoma Intl - HEL Helsinki-Vantaa

SEAHEL

Seattle/Tacoma Intl

Tue 11/17

2:35 pm-10:25 pm

2 stops21h 50m

Helsinki-Vantaa

Sun 11/22

10:00 am-5:00 pm

2 stops17h 00m

$655

SeattleHelsinki

SEA Seattle/Tacoma Intl - HEL Helsinki-Vantaa

SEAHEL

Seattle/Tacoma Intl

Tue 11/17

2:35 pm-10:25 pm

2 stops21h 50m

Helsinki-Vantaa

Sun 11/22

9:35 pm-5:00 pm

3 stops29h 25m

$660

SeattleHelsinki

SEA Seattle/Tacoma Intl - HEL Helsinki-Vantaa

SEAHEL

Seattle/Tacoma Intl

Sun 9/27

3:55 pm-1:30 am

1 stop23h 35m

Helsinki-Vantaa

Sat 10/10

9:05 pm-1:45 pm

1 stop26h 40m

$690

SeattleHelsinki

SEA Seattle/Tacoma Intl - HEL Helsinki-Vantaa

SEAHEL

Seattle/Tacoma Intl

Fri 10/16

7:00 pm-10:55 pm

1 stop17h 55m

Helsinki-Vantaa

Fri 10/23

3:00 pm-8:40 pm

1 stop15h 40m

$696

Quickest round-trip

SeattleHelsinki

SEA Seattle/Tacoma Intl - HEL Helsinki-Vantaa

SEAHEL

Seattle/Tacoma Intl

Wed 1/20

2:35 pm-1:00 pm

1 stop12h 25m

Helsinki-Vantaa

Wed 1/27

2:00 pm-5:00 pm

1 stop13h 00m

$711

SeattleHelsinki

SEA Seattle/Tacoma Intl - HEL Helsinki-Vantaa

SEAHEL

Seattle/Tacoma Intl

Sun 9/27

3:55 pm-3:45 pm

2 stops37h 50m

Helsinki-Vantaa

Sat 10/10

9:05 pm-1:45 pm

1 stop26h 40m

$723

SeattleHelsinki

SEA Seattle/Tacoma Intl - HEL Helsinki-Vantaa

SEAHEL

Seattle/Tacoma Intl

Mon 9/28

5:40 pm-1:10 pm

Nonstop9h 30m

Helsinki-Vantaa

Mon 11/30

7:35 pm-11:25 am

1 stop25h 50m

$875

SeattleHelsinki

SEA Seattle/Tacoma Intl - HEL Helsinki-Vantaa

SEAHEL

Seattle/Tacoma Intl

Mon 11/9

3:25 pm-4:40 pm

1 stop15h 15m

Helsinki-Vantaa

Mon 11/16

2:05 pm-11:47 am

1 stop31h 42m

$907

SeattleHelsinki

SEA Seattle/Tacoma Intl - HEL Helsinki-Vantaa

SEAHEL

Seattle/Tacoma Intl

Tue 11/10

4:05 pm-4:40 pm

1 stop14h 35m

Helsinki-Vantaa

Mon 11/16

2:05 pm-11:47 am

1 stop31h 42m

$907

SeattleHelsinki

SEA Seattle/Tacoma Intl - HEL Helsinki-Vantaa

SEAHEL

Seattle/Tacoma Intl

Mon 11/2

10:27 am-11:40 am

1 stop15h 13m

Helsinki-Vantaa

Mon 11/30

7:35 pm-11:25 am

1 stop25h 50m

$911

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from Seattle to Helsinki

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

Layovers

What is the typical price of a round-trip flight between Seattle and Helsinki?

Prices are currently typical for flights on this route.

Typical prices usually range from $604 to $1,085.
The lowest price recently found on this route was $655.

What is the cheapest month to fly to Helsinki?

The month of January is, on average, the cheapest month to fly to Helsinki from Seattle, with most prices found around $543. If you aren’t able to travel during the month of January, then book flights to Helsinki from Seattle during September instead. Flights to Helsinki in September, while not as cheap as those in January, still average around $743.

What is the cheapest day to depart on your flight to Helsinki?

The cheapest day to depart on your flight to Helsinki is on a Wednesday when prices can be found for as low as $874. This is often the case because there is less demand to fly during this day of the week. Flights from Seattle to Helsinki on a Sunday will generally be more expensive and average around $1,208. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

What is the cheapest Seattle/Tacoma Intl to Helsinki-Vantaa flight route?

Fly from Seattle/Tacoma Intl to Helsinki-Vantaa for the best Seattle/Tacoma Intl - Helsinki-Vantaa flight prices

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

You are more likely to see cheaper flights to Helsinki from Seattle when booking weeks ahead of your departure date. In general, you can expect to find flights to Helsinki for around $911 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Helsinki from Seattle for as low as $815 on momondo.

What cabin class options are available on Seattle to Helsinki flights?

There are 3 cabin classes available to choose from on Seattle to Helsinki flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on Seattle to Helsinki flights?

No. A direct flight is the cheapest option for a flight between Seattle to Helsinki.

How have Seattle to Helsinki flight prices changed over time?

As of September 2026, prices for Seattle to Helsinki flights are approximately 34% cheaper when compared to flights at the same time last year.

When to book flights from Seattle to Helsinki

Are you open to changing your travel dates? Check out the ideal times to fly from Seattle to Helsinki according to our flight data. Find out which month and days have the cheapest flights.

Estimated round-trip price

Cheap Seattle to Helsinki (SEA to HEL) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Seattle to Helsinki

Best Price Found	$260
Fastest flight time	9h 30m
Direct flights	None

The best one-way flight to Helsinki from Seattle in the past 72 hours is $260. The best round-trip flight deal from Seattle to Helsinki found on momondo in the last 72 hours is $655.

The fastest flight from Seattle to Helsinki takes 9h 30m

There are no direct flights from Seattle to Helsinki. Popular non-direct route for this connection is Seattle/Tacoma Intl Airport - Helsinki-Vantaa Airport.

Search flight deals

Frequently asked questions about flying from Seattle to Helsinki

How far is Seattle/Tacoma Intl to Helsinki-Vantaa by plane?
The distance between Seattle/Tacoma Intl and Helsinki-Vantaa is about 4763.3 mi. Flights usually cover this in 9h 30m, depending on flying conditions and air traffic around both airports.
When did momondo last update prices for flights from Seattle/Tacoma Intl Airport to Helsinki-Vantaa Airport?
Prices for flights from Seattle/Tacoma Intl Airport to Helsinki-Vantaa Airport are refreshed on a daily basis.
How many operators does momondo search for flights from Seattle/Tacoma Intl Airport to Helsinki-Vantaa Airport?
As of September 2026, there are 4 operators available to choose from for flights from Seattle/Tacoma Intl Airport to Helsinki-Vantaa Airport.
How old do you have to be to fly from Seattle/Tacoma Intl Airport to Helsinki-Vantaa Airport?
The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Seattle/Tacoma Intl Airport to Helsinki-Vantaa Airport.
What documentation or ID do you need to fly to Helsinki-Vantaa Airport?
The necessary travel and health documents for your Helsinki-Vantaa Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.
What is the most popular plane model from Seattle to Helsinki?
momondo data reveals that the most frequently booked plane model on the route from Seattle to Helsinki is Airbus A330-300, representing 56.52% of all bookings. The subsequent popular models are Airbus A330 at 13.91%, Airbus A350-900 at 5.22%, and Airbus A330-900neo at 4.35%.
What is the most popular airline from Seattle to Helsinki?
Based on momondo bookings for flights between Seattle and Helsinki, the leading airline is Icelandair, making up 57% of the total bookings. Other popular airlines include Scandinavian Airlines with 21%, Finnair with 19%, and Delta with 4%.

Best airlines flying from Seattle to Helsinki

Compare and see reviews for airlines that fly from Seattle to Helsinki with momondo

Airline	Rating	Free Cancellation	Price
Scandinavian Airlines	PriceFrom $353	Free Cancellation	Rating 7.4 1,984 reviews	Search Scandinavian Airlines flights
Icelandair	PriceFrom $524	Free Cancellation	Rating 6.9 745 reviews	Search Icelandair flights
Delta	PriceFrom $731	Free Cancellation	Rating 7.8 8,579 reviews	Search Delta flights
Finnair	PriceFrom $845	Free Cancellation	Rating 7.6 1,430 reviews	Search Finnair flights

Vantaa

Espoo

Lahti

Kotka

Why use momondo?

Why should I use momondo to find a flight deal from Seattle to Helsinki?

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Seattle to Helsinki. momondo saves you time and could save you money on your trip.

Can I find flights from Seattle to Helsinki with flexible booking policies on momondo?

Yes. All flights to Helsinki from Seattle on momondo can be compared and filtered by various policies on offer, including flexible booking.

How can momondo help me find flights from Seattle to Helsinki?

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Seattle to Helsinki.

I’m not ready to book a flight from Seattle to Helsinki right now. Can momondo alert me if prices change?

Yes momondo offers price alerts on flights to Helsinki from Seattle. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.