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

Copenhagen (CPH) was the most common stop: 46% of momondo users choosing 1-stop flights on this route connected there.

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

Icelandair is the most popular carrier operating from Seattle/Tacoma Intl to Helsinki-Vantaa

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 48% of people opting to fly with this airline when traveling to Helsinki. Keep in mind that there are 6 different airlines that fly to Helsinki on a routine basis, so you have a few additional options to choose from.

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: 12h 23m.

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

Flights via Amsterdam (AMS) offer the lowest average round-trip price of $703.

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

Reykjavik (KEF) has the shortest average layover time for this route: 1h 32m.

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 May 2026, there are 6 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.

$280 Cheap Flights from Seattle to Helsinki in 2026

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

Prices are currently low for flights on this route. Typical prices usually range from $1,272 to $946. The lowest price recently found on this route was $585.

1 adult

0 bags

Discover deals from 900+ travel sites with momondo.

Save money when you book flights with momondo

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Not ready to book? to track prices.

Search flight deals

Find the cheapest flights from Seattle to Helsinki

Round-trip

One-way

Last minute

Direct

Cheap round-trip flights

Enter your travel dates to find the best prices.

8:00 am - 9:20 pm

SEA

HEL

27h 20m

2 stops

8:30 am - 9:07 pm

HEL

SEA

22h 37m

2 stops

$585Multiple Airlines

Mon, Aug 17 - Tue, Aug 25

3:40 pm - 6:20 pm

SEA

HEL

16h 40m

2 stops

5:30 am - 8:40 pm

HEL

SEA

25h 10m

3 stops

$648Multiple Airlines

Mon, Aug 17 - Tue, Aug 25

8:00 am - 12:40 am

SEA

HEL

30h 40m

3 stops

8:30 am - 9:07 pm

HEL

SEA

22h 37m

2 stops

$698Multiple Airlines

Thu, Aug 27 - Thu, Sep 3

8:00 am - 12:40 am

SEA

HEL

30h 40m

3 stops

5:30 am - 9:07 pm

HEL

SEA

25h 37m

3 stops

$704Multiple Airlines

Thu, Aug 27 - Thu, Sep 3

8:00 am - 6:20 pm

SEA

HEL

24h 20m

2 stops

7:05 am - 9:07 pm

HEL

SEA

24h 02m

2 stops

$714Multiple Airlines

Thu, Aug 27 - Thu, Sep 3

6:50 pm - 8:20 am

SEA

HEL

27h 30m

3 stops

7:05 am - 10:40 pm

HEL

SEA

25h 35m

3 stops

$742Multiple Airlines

Fri, Jun 5 - Tue, Jun 9

1:50 pm - 1:05 pm

SEA

HEL

13h 15m

1 stop

7:00 am - 4:35 pm

HEL

SEA

19h 35m

1 stop

$757Delta

Sat, Aug 29 - Fri, Sep 18

7:15 am - 1:05 pm

SEA

HEL

19h 50m

2 stops

7:00 am - 4:35 pm

HEL

SEA

19h 35m

1 stop

$761Delta

Sat, Aug 29 - Fri, Sep 18

2:10 pm - 12:40 am

SEA

HEL

24h 30m

3 stops

7:05 am - 9:08 pm

HEL

SEA

24h 03m

2 stops

$766Multiple Airlines

Fri, Jun 5 - Tue, Jun 9

10:45 am - 11:50 pm

SEA

HEL

27h 05m

3 stops

9:35 am - 10:07 am

HEL

SEA

34h 32m

3 stops

$768Multiple Airlines

Tue, Jul 14 - Tue, Jul 21

Icelandair flights from Seattle to Helsinki

Our best Icelandair deals on Seattle to Helsinki flight tickets

Icelandair

Oct 18

SEA3:40 pmSeattle/Tacoma Intl

18h 05m

2 stops

HEL7:45 pmHelsinki-Vantaa

Oct 22

HEL12:30 pmHelsinki-Vantaa

15h 25m

2 stops

SEA5:55 pmSeattle/Tacoma Intl

$796

Icelandair

Sep 1

SEA3:40 pmSeattle/Tacoma Intl

17h 00m

2 stops

HEL6:40 pmHelsinki-Vantaa

Sep 15

HEL11:40 amHelsinki-Vantaa

19h 00m

2 stops

SEA8:40 pmSeattle/Tacoma Intl

$822

Icelandair

Sep 1

SEA3:40 pmSeattle/Tacoma Intl

17h 00m

2 stops

HEL6:40 pmHelsinki-Vantaa

Sep 15

HEL11:40 amHelsinki-Vantaa

19h 00m

2 stops

SEA8:40 pmSeattle/Tacoma Intl

$837

Finnair flights from Seattle to Helsinki

Our best Finnair deals on Seattle to Helsinki flight tickets

Finnair

Jun 2

SEA5:40 pmSeattle/Tacoma Intl

9h 30m

HEL1:10 pmHelsinki-Vantaa

Jul 17

HEL4:20 pmHelsinki-Vantaa

9h 40m

SEA4:00 pmSeattle/Tacoma Intl

$1,100

Finnair

Jun 2

SEA10:27 amSeattle/Tacoma Intl

17h 48m

1 stop

HEL2:15 pmHelsinki-Vantaa

Jul 17

HEL4:20 pmHelsinki-Vantaa

9h 40m

SEA4:00 pmSeattle/Tacoma Intl

$1,683

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

SeattleHelsinki

SEA - HEL

SEAHEL

Seattle/Tacoma Intl

Mon 8/17

8:00 am-9:20 pm

2 stops27h 20m

Helsinki-Vantaa

Tue 8/25

8:30 am-9:07 pm

2 stops22h 37m

$585

SeattleHelsinki

SEA - HEL

SEAHEL

Seattle/Tacoma Intl

Mon 8/17

3:40 pm-6:20 pm

2 stops16h 40m

Helsinki-Vantaa

Tue 8/25

5:30 am-8:40 pm

3 stops25h 10m

$648

SeattleHelsinki

SEA - HEL

SEAHEL

Seattle/Tacoma Intl

Thu 8/27

8:00 am-12:40 am

3 stops30h 40m

Helsinki-Vantaa

Thu 9/3

8:30 am-9:07 pm

2 stops22h 37m

$698

SeattleHelsinki

SEA - HEL

SEAHEL

Seattle/Tacoma Intl

Thu 8/27

8:00 am-12:40 am

3 stops30h 40m

Helsinki-Vantaa

Thu 9/3

5:30 am-9:07 pm

3 stops25h 37m

$704

SeattleHelsinki

SEA - HEL

SEAHEL

Seattle/Tacoma Intl

Thu 8/27

8:00 am-6:20 pm

2 stops24h 20m

Helsinki-Vantaa

Thu 9/3

7:05 am-9:07 pm

2 stops24h 02m

$714

SeattleHelsinki

SEA - HEL

SEAHEL

Seattle/Tacoma Intl

Fri 6/5

6:50 pm-8:20 am

3 stops27h 30m

Helsinki-Vantaa

Tue 6/9

7:05 am-10:40 pm

3 stops25h 35m

$742

Quickest round-trip

SeattleHelsinki

SEA - HEL

SEAHEL

Seattle/Tacoma Intl

Sat 8/29

1:50 pm-1:05 pm

1 stop13h 15m

Helsinki-Vantaa

Fri 9/18

7:00 am-4:35 pm

1 stop19h 35m

$757

SeattleHelsinki

SEA - HEL

SEAHEL

Seattle/Tacoma Intl

Sat 8/29

7:15 am-1:05 pm

2 stops19h 50m

Helsinki-Vantaa

Fri 9/18

7:00 am-4:35 pm

1 stop19h 35m

$761

SeattleHelsinki

SEA - HEL

SEAHEL

Seattle/Tacoma Intl

Fri 6/5

2:10 pm-12:40 am

3 stops24h 30m

Helsinki-Vantaa

Tue 6/9

7:05 am-9:08 pm

2 stops24h 03m

$766

SeattleHelsinki

SEA - HEL

SEAHEL

Seattle/Tacoma Intl

Tue 7/14

10:45 am-11:50 pm

3 stops27h 05m

Helsinki-Vantaa

Tue 7/21

9:35 am-10:07 am

3 stops34h 32m

$768

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?

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 $540. If you aren’t able to travel during the month of January, then book flights to Helsinki from Seattle during October instead. Flights to Helsinki in October, while not as cheap as those in January, still average around $571.

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 $750. 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 $1,176. 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 $838 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 $542 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 May 2026, prices for Seattle to Helsinki flights are approximately 43% 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	$419
Fastest flight time	9h 30m
Direct flights	Mon, Wed, Sat and Sun
Airports in Helsinki	1 airport

The best one-way flight to Helsinki from Seattle in the past 72 hours is $419. The best round-trip flight deal from Seattle to Helsinki found on momondo in the last 72 hours is $1,288.

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

Direct flights go from Seattle to Helsinki on Monday, Wednesday, Saturday and Sunday. There are no airlines offering direct flights.

There is 1 airport in Helsinki. From Seattle there are direct flights to Helsinki-Vantaa (HEL).

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 May 2026, there are 6 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 60.99% of all bookings. The subsequent popular models are Airbus A330 at 14.80%, Airbus A350-900 at 3.59%, and Airbus A330-900neo at 3.59%.
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 46% of the total bookings. Other popular airlines include Scandinavian Airlines with 27%, Finnair with 17%, and British Airways 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 $323	Free Cancellation	Rating 7.4 1,788 reviews	Search Scandinavian Airlines flights
Icelandair	PriceFrom $507	Free Cancellation	Rating 7.0 657 reviews	Search Icelandair flights
KLM	PriceFrom $674	Free Cancellation	Rating 7.8 1,521 reviews	Search KLM flights
British Airways	PriceFrom $725	Free Cancellation	Rating 6.7 7,997 reviews	Search British Airways flights
Finnair	PriceFrom $786	Free Cancellation	Rating 7.7 1,399 reviews	Search Finnair flights
Lufthansa	PriceFrom $852	Free Cancellation	Rating 6.8 8,023 reviews	Search Lufthansa 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.