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

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

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

Flights connecting via Amsterdam (AMS) have the shortest average one-way travel time: 15h 07m.

What airlines fly to Helsinki?

Icelandair, Finnair and Scandinavian Airlines 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 59% 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: 75% of momondo users choosing 1-stop flights on this route connected there.

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

Reykjavik (KEF) has the shortest average layover time for this route: 2h 55m.

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

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 November 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.

$302 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

Last minute

Direct

Cheap round-trip flights

Enter your travel dates to find the best prices.

7:45 am - 10:25 pmSEA Seattle/Tacoma Intl-HEL Helsinki-Vantaa

28h 40m3 stops Toronto Pearson Intl Zurich Stockholm Arlanda

7:50 pm - 1:00 pmHEL Helsinki-Vantaa-SEA Seattle/Tacoma Intl

27h 10m2 stops Stockholm Arlanda Munich Franz Josef Strauss

$550Multiple Airlines

Tue, Dec 8 - Tue, Dec 15

7:45 am - 10:25 pmSEA Seattle/Tacoma Intl-HEL Helsinki-Vantaa

28h 40m3 stops Toronto Pearson Intl Zurich Stockholm Arlanda

4:40 pm - 1:00 pmHEL Helsinki-Vantaa-SEA Seattle/Tacoma Intl

30h 20m2 stops Stockholm Arlanda Munich Franz Josef Strauss

$552Multiple Airlines

Tue, Dec 8 - Tue, Dec 15

3:40 pm - 2:00 pmSEA Seattle/Tacoma Intl-HEL Helsinki-Vantaa

12h 20m1 stop Reykjavik Keflavik Intl

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

15h 40m1 stop Reykjavik Keflavik Intl

$710Icelandair

Tue, Apr 6 - Fri, Apr 16

7:00 pm - 2:00 pmSEA Seattle/Tacoma Intl-HEL Helsinki-Vantaa

33h 00m1 stop Reykjavik Keflavik Intl

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

12h 55m1 stop Reykjavik Keflavik Intl

$731Icelandair

Wed, May 5 - Tue, May 11

7:20 am - 10:35 amSEA Seattle/Tacoma Intl-HEL Helsinki-Vantaa

17h 15m2 stops Boston Logan Intl Kastrup Copenhagen

11:10 am - 10:00 pmHEL Helsinki-Vantaa-SEA Seattle/Tacoma Intl

20h 50m2 stops Kastrup Copenhagen Boston Logan Intl

$815Scandinavian Airlines

Sun, Jan 10 - Wed, Jan 20

7:15 am - 3:25 pmSEA Seattle/Tacoma Intl-HEL Helsinki-Vantaa

22h 10m2 stops Chicago O'Hare Intl Kastrup Copenhagen

6:15 am - 10:04 pmHEL Helsinki-Vantaa-SEA Seattle/Tacoma Intl

25h 49m2 stops Kastrup Copenhagen Boston Logan Intl

$815Scandinavian Airlines

Fri, Feb 5 - Tue, Feb 16

1:19 pm - 2:15 pmSEA Seattle/Tacoma Intl-HEL Helsinki-Vantaa

14h 56m1 stop Chicago O'Hare Intl

4:20 pm - 4:00 pmHEL Helsinki-Vantaa-SEA Seattle/Tacoma Intl

9h 40mnonstop

$987Finnair

Wed, May 5 - Tue, May 11

1:19 pm - 2:15 pmSEA Seattle/Tacoma Intl-HEL Helsinki-Vantaa

14h 56m1 stop Chicago O'Hare Intl

4:20 pm - 4:00 pmHEL Helsinki-Vantaa-SEA Seattle/Tacoma Intl

9h 40mnonstop

$1,013Finnair

Wed, Apr 7 - Sun, Apr 18

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

15h 15m1 stop Paris Charles de Gaulle

6:40 am - 11:50 amHEL Helsinki-Vantaa-SEA Seattle/Tacoma Intl

15h 10m1 stop Amsterdam Schiphol

$1,020Delta

Mon, Nov 23 - Tue, Dec 8

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

6:40 am - 11:50 amHEL Helsinki-Vantaa-SEA Seattle/Tacoma Intl

15h 10m1 stop Amsterdam Schiphol

$1,020Delta

Mon, Nov 23 - Tue, Dec 8

Cheap last minute flights

Enter your travel dates to find the best prices.

7:45 am - 11:55 pmSEA Seattle/Tacoma Intl-HEL Helsinki-Vantaa

30h 10m3 stops Toronto Pearson Intl Zurich Stockholm Arlanda

9:00 pm - 6:22 pmHEL Helsinki-Vantaa-SEA Seattle/Tacoma Intl

31h 22m3 stops Stockholm Arlanda Munich Franz Josef Strauss Vancouver Intl

$595Multiple Airlines

Mon, Nov 16 - Mon, Nov 23

2:35 pm - 11:55 pmSEA Seattle/Tacoma Intl-HEL Helsinki-Vantaa

23h 20m2 stops Reykjavik Keflavik Intl Stockholm Arlanda

4:05 pm - 5:00 pmHEL Helsinki-Vantaa-SEA Seattle/Tacoma Intl

34h 55m3 stops Kastrup Copenhagen Stockholm Arlanda Reykjavik Keflavik Intl

$677Multiple Airlines

Mon, Nov 16 - Mon, Nov 23

2:35 pm - 11:15 pmSEA Seattle/Tacoma Intl-HEL Helsinki-Vantaa

22h 40m2 stops Reykjavik Keflavik Intl Oslo Gardermoen

7:50 pm - 5:00 pmHEL Helsinki-Vantaa-SEA Seattle/Tacoma Intl

31h 10m3 stops Stockholm Arlanda Oslo Gardermoen Reykjavik Keflavik Intl

$801Multiple Airlines

Mon, Nov 16 - Tue, Dec 1

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

$850Icelandair

Mon, Nov 16 - Tue, Dec 1

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

12h 25m1 stop Reykjavik Keflavik Intl

2:00 pm - 11:59 pmHEL Helsinki-Vantaa-SEA Seattle/Tacoma Intl

19h 59m2 stops Reykjavik Keflavik Intl Denver Intl

$935Icelandair

Mon, Nov 16 - Mon, Nov 23

10:39 am - 1:35 amSEA Seattle/Tacoma Intl-HEL Helsinki-Vantaa

28h 56m2 stops Chicago O'Hare Intl Kastrup Copenhagen

9:00 pm - 10:55 pmHEL Helsinki-Vantaa-SEA Seattle/Tacoma Intl

35h 55m2 stops Kastrup Copenhagen Boston Logan Intl

$974Scandinavian Airlines

Fri, Nov 13 - Mon, Nov 16

7:27 am - 1:35 amSEA Seattle/Tacoma Intl-HEL Helsinki-Vantaa

32h 08m2 stops Chicago O'Hare Intl Kastrup Copenhagen

6:15 am - 11:53 pmHEL Helsinki-Vantaa-SEA Seattle/Tacoma Intl

27h 38m2 stops Kastrup Copenhagen Los Angeles

$974Scandinavian Airlines

Fri, Nov 13 - Sun, Nov 15

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

12h 25m1 stop Reykjavik Keflavik Intl

7:25 am - 5:00 pmHEL Helsinki-Vantaa-SEA Seattle/Tacoma Intl

19h 35m2 stops Stockholm Arlanda Reykjavik Keflavik Intl

$1,175Icelandair

Mon, Nov 16 - Fri, Nov 20

7:15 am - 1:10 pmSEA Seattle/Tacoma Intl-HEL Helsinki-Vantaa

19h 55m2 stops New York John F Kennedy Intl Amsterdam Schiphol

6:40 am - 11:47 amHEL Helsinki-Vantaa-SEA Seattle/Tacoma Intl

15h 07m1 stop Amsterdam Schiphol

$1,277Delta

Mon, Nov 16 - Fri, Nov 20

6:45 pm - 2:25 pmSEA Seattle/Tacoma Intl-HEL Helsinki-Vantaa

33h 40m2 stops London Heathrow Stockholm Arlanda

7:20 am - 11:25 amHEL Helsinki-Vantaa-SEA Seattle/Tacoma Intl

38h 05m2 stops Oslo Gardermoen London Heathrow

$2,506Finnair

Mon, Nov 16 - Fri, Nov 20

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Icelandair flights from Seattle to Helsinki

Our best Icelandair deals on Seattle to Helsinki flight tickets

Icelandair

Apr 6

SEA3:40 pmSeattle/Tacoma Intl

12h 20m

1 stop

HEL2:00 pmHelsinki-Vantaa

Apr 16

HEL3:00 pmHelsinki-Vantaa

15h 40m

1 stop

SEA8:40 pmSeattle/Tacoma Intl

$710

Icelandair

May 5

SEA7:00 pmSeattle/Tacoma Intl

33h 00m

1 stop

HEL2:00 pmHelsinki-Vantaa

May 11

HEL3:00 pmHelsinki-Vantaa

12h 55m

1 stop

SEA5:55 pmSeattle/Tacoma Intl

$731

Icelandair

Nov 23

SEA2:35 pmSeattle/Tacoma Intl

12h 25m

1 stop

HEL1:00 pmHelsinki-Vantaa

Dec 8

HEL2:00 pmHelsinki-Vantaa

13h 00m

1 stop

SEA5:00 pmSeattle/Tacoma Intl

$747

Scandinavian Airlines flights from Seattle to Helsinki

Our best Scandinavian Airlines deals on Seattle to Helsinki flight tickets

Scandinavian Airlines

Feb 5

SEA7:15 amSeattle/Tacoma Intl

22h 10m

2 stops

HEL3:25 pmHelsinki-Vantaa

Feb 16

HEL6:15 amHelsinki-Vantaa

25h 49m

2 stops

SEA10:04 pmSeattle/Tacoma Intl

$815

Scandinavian Airlines

Dec 14

SEA10:39 amSeattle/Tacoma Intl

37h 51m

2 stops

HEL10:30 amHelsinki-Vantaa

Jan 7

HEL4:05 pmHelsinki-Vantaa

39h 55m

2 stops

SEA10:00 pmSeattle/Tacoma Intl

$816

Scandinavian Airlines

Apr 7

SEA6:00 amSeattle/Tacoma Intl

42h 35m

2 stops

HEL10:35 amHelsinki-Vantaa

Apr 18

HEL9:05 pmHelsinki-Vantaa

35h 00m

2 stops

SEA10:05 pmSeattle/Tacoma Intl

$819

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

SeattleHelsinki

SEA Seattle/Tacoma Intl - HEL Helsinki-Vantaa

SEAHEL

Seattle/Tacoma Intl

Tue 12/8

7:45 am-10:25 pm

3 stops28h 40m

Helsinki-Vantaa

Tue 12/15

7:50 pm-1:00 pm

2 stops27h 10m

$550

SeattleHelsinki

SEA Seattle/Tacoma Intl - HEL Helsinki-Vantaa

SEAHEL

Seattle/Tacoma Intl

Tue 12/8

7:45 am-10:25 pm

3 stops28h 40m

Helsinki-Vantaa

Tue 12/15

4:40 pm-1:00 pm

2 stops30h 20m

$552

SeattleHelsinki

SEA Seattle/Tacoma Intl - HEL Helsinki-Vantaa

SEAHEL

Seattle/Tacoma Intl

Tue 4/6

3:40 pm-2:00 pm

1 stop12h 20m

Helsinki-Vantaa

Fri 4/16

3:00 pm-8:40 pm

1 stop15h 40m

$710

SeattleHelsinki

SEA Seattle/Tacoma Intl - HEL Helsinki-Vantaa

SEAHEL

Seattle/Tacoma Intl

Wed 5/5

7:00 pm-2:00 pm

1 stop33h 00m

Helsinki-Vantaa

Tue 5/11

3:00 pm-5:55 pm

1 stop12h 55m

$731

SeattleHelsinki

SEA Seattle/Tacoma Intl - HEL Helsinki-Vantaa

SEAHEL

Seattle/Tacoma Intl

Sun 1/10

7:20 am-10:35 am

2 stops17h 15m

Helsinki-Vantaa

Wed 1/20

11:10 am-10:00 pm

2 stops20h 50m

$815

SeattleHelsinki

SEA Seattle/Tacoma Intl - HEL Helsinki-Vantaa

SEAHEL

Seattle/Tacoma Intl

Fri 2/5

7:15 am-3:25 pm

2 stops22h 10m

Helsinki-Vantaa

Tue 2/16

6:15 am-10:04 pm

2 stops25h 49m

$815

Quickest round-trip

SeattleHelsinki

SEA Seattle/Tacoma Intl - HEL Helsinki-Vantaa

SEAHEL

Seattle/Tacoma Intl

Wed 5/5

1:19 pm-2:15 pm

1 stop14h 56m

Helsinki-Vantaa

Tue 5/11

4:20 pm-4:00 pm

Nonstop9h 40m

$987

SeattleHelsinki

SEA Seattle/Tacoma Intl - HEL Helsinki-Vantaa

SEAHEL

Seattle/Tacoma Intl

Wed 4/7

1:19 pm-2:15 pm

1 stop14h 56m

Helsinki-Vantaa

Sun 4/18

4:20 pm-4:00 pm

Nonstop9h 40m

$1,013

SeattleHelsinki

SEA Seattle/Tacoma Intl - HEL Helsinki-Vantaa

SEAHEL

Seattle/Tacoma Intl

Mon 11/23

3:25 pm-4:40 pm

1 stop15h 15m

Helsinki-Vantaa

Tue 12/8

6:40 am-11:50 am

1 stop15h 10m

$1,020

SeattleHelsinki

SEA Seattle/Tacoma Intl - HEL Helsinki-Vantaa

SEAHEL

Seattle/Tacoma Intl

Mon 11/23

7:15 am-4:40 pm

2 stops23h 25m

Helsinki-Vantaa

Tue 12/8

6:40 am-11:50 am

1 stop15h 10m

$1,020

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 low for flights on this route.

Typical prices usually range from $883 to $1,152.
The lowest price recently found on this route was $550.

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 $550. 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 Tuesday when prices can be found for as low as $958. 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 Wednesday will generally be more expensive and average around $1,251. 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 $964 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 $800 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?

You could potentially save up to 5% on your flight if you consider stops on a Seattle to Helsinki flight.

How have Seattle to Helsinki flight prices changed over time?

As of November 2026, prices for Seattle to Helsinki flights are approximately 47% more expensive 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	$302
Fastest flight time	9h 30m
Direct flights	Wed and Sat
Airports in Helsinki	1 airport

The best one-way flight to Helsinki from Seattle in the past 72 hours is $302. The best round-trip flight deal from Seattle to Helsinki found on momondo in the last 72 hours is $550.

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

Direct flights go from Seattle to Helsinki on Wednesday and Saturday. 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 November 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 43.64% of all bookings. The subsequent popular models are Airbus A350-900 at 9.09%, Airbus A330-900neo at 9.09%, and Airbus A330 at 7.27%.
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 59% of the total bookings. Other popular airlines include Finnair with 21%, Scandinavian Airlines with 15%, and Delta with 5%.

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 $338	Free Cancellation	Rating 7.5 2,030 reviews	Search Scandinavian Airlines flights
Icelandair	PriceFrom $528	Free Cancellation	Rating 7.0 766 reviews	Search Icelandair flights
Delta	PriceFrom $731	Free Cancellation	Rating 7.8 8,714 reviews	Search Delta flights
Finnair	PriceFrom $845	Free Cancellation	Rating 7.6 1,411 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.