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Cheap flights from Seattle to Helsinki from $332

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Seattle to Helsinki departing on 11/10. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Cheap round-trip flights

Scandinavian Airlines Logo
4:20 pm - 11:35 pmSEA-HEL
21h 15m2 stops
Scandinavian Airlines Logo
6:15 am - 10:25 pmHEL-SEA
25h 10m2 stops
$501Scandinavian Airlines
Find Deal
Wed, Oct 22 - Wed, Oct 29
Scandinavian Airlines Logo
4:20 pm - 3:25 pmSEA-HEL
13h 05m1 stop
Scandinavian Airlines Logo
4:05 pm - 2:00 pmHEL-SEA
31h 55m1 stop
$505Scandinavian Airlines
Find Deal
Sun, Oct 5 - Tue, Oct 21
Multiple Airlines Logo
3:45 pm - 6:20 pmSEA-HEL
16h 35m2 stops
Multiple Airlines Logo
7:05 am - 5:50 pmHEL-SEA
44h 45m2 stops
$506Multiple Airlines
Find Deal
Sun, Oct 5 - Tue, Oct 21
Scandinavian Airlines Logo
4:20 pm - 8:15 pmSEA-HEL
17h 55m1 stop
Scandinavian Airlines Logo
4:05 pm - 2:00 pmHEL-SEA
31h 55m1 stop
$514Scandinavian Airlines
Find Deal
Sun, Oct 5 - Tue, Oct 21
Scandinavian Airlines Logo
4:20 pm - 3:25 pmSEA-HEL
13h 05m1 stop
Scandinavian Airlines Logo
9:05 pm - 2:00 pmHEL-SEA
26h 55m2 stops
$517Scandinavian Airlines
Find Deal
Sun, Oct 5 - Tue, Oct 21
Scandinavian Airlines Logo
2:00 pm - 1:35 amSEA-HEL
25h 35m2 stops
Scandinavian Airlines Logo
6:10 am - 11:27 pmHEL-SEA
27h 17m2 stops
$518Scandinavian Airlines
Find Deal
Fri, Feb 27 - Tue, May 12
Scandinavian Airlines Logo
4:20 pm - 3:25 pmSEA-HEL
13h 05m1 stop
Scandinavian Airlines Logo
9:00 pm - 2:00 pmHEL-SEA
27h 00m1 stop
$525Scandinavian Airlines
Find Deal
Sun, Oct 5 - Tue, Oct 21
Turkish Airlines Logo
12:30 pm - 6:40 pmSEA-HEL
20h 10m1 stop
Turkish Airlines Logo
7:35 pm - 5:15 pmHEL-SEA
31h 40m1 stop
$624Turkish Airlines
Find Deal
Thu, Oct 2 - Tue, Oct 7
Turkish Airlines Logo
7:00 pm - 6:05 pmSEA-HEL
37h 05m1 stop
Turkish Airlines Logo
7:00 pm - 5:05 pmHEL-SEA
32h 05m1 stop
$626Turkish Airlines
Find Deal
Thu, Nov 6 - Wed, Nov 12
Turkish Airlines Logo
7:00 pm - 11:35 amSEA-HEL
30h 35m1 stop
Turkish Airlines Logo
7:00 pm - 5:05 pmHEL-SEA
32h 05m1 stop
$639Turkish Airlines
Find Deal
Wed, Nov 5 - Wed, Nov 12

Scandinavian Airlines flights from Seattle to Helsinki

Our best Scandinavian Airlines deals on Seattle to Helsinki flight tickets
Scandinavian Airlines
Oct 22
SEA4:20 pmSeattle/Tacoma Intl
21h 15m
2 stops
HEL11:35 pmHelsinki-Vantaa
Oct 29
HEL6:15 amHelsinki-Vantaa
25h 10m
2 stops
SEA10:25 pmSeattle/Tacoma Intl
$501
Find similar
Scandinavian Airlines
Oct 5
SEA4:20 pmSeattle/Tacoma Intl
13h 05m
1 stop
HEL3:25 pmHelsinki-Vantaa
Oct 21
HEL4:05 pmHelsinki-Vantaa
31h 55m
1 stop
SEA2:00 pmSeattle/Tacoma Intl
$505
Find similar
Scandinavian Airlines
Oct 5
SEA4:20 pmSeattle/Tacoma Intl
17h 55m
1 stop
HEL8:15 pmHelsinki-Vantaa
Oct 21
HEL4:05 pmHelsinki-Vantaa
31h 55m
1 stop
SEA2:00 pmSeattle/Tacoma Intl
$514
Find similar

Turkish Airlines flights from Seattle to Helsinki

Our best Turkish Airlines deals on Seattle to Helsinki flight tickets
Turkish Airlines
Sep 24
SEA7:10 pmSeattle/Tacoma Intl
30h 30m
1 stop
HEL11:40 amHelsinki-Vantaa
Oct 1
HEL7:35 pmHelsinki-Vantaa
25h 00m
1 stop
SEA10:35 amSeattle/Tacoma Intl
$619
Find similar
Turkish Airlines
Oct 2
SEA12:30 pmSeattle/Tacoma Intl
20h 10m
1 stop
HEL6:40 pmHelsinki-Vantaa
Oct 7
HEL7:35 pmHelsinki-Vantaa
31h 40m
1 stop
SEA5:15 pmSeattle/Tacoma Intl
$624
Find similar
Turkish Airlines
Nov 6
SEA7:00 pmSeattle/Tacoma Intl
37h 05m
1 stop
HEL6:05 pmHelsinki-Vantaa
Nov 12
HEL7:00 pmHelsinki-Vantaa
32h 05m
1 stop
SEA5:05 pmSeattle/Tacoma Intl
$626
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Seattle to Helsinki that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated September 16, 2025.
Use the filters below to find and compare flights from Seattle to Helsinki that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

SeattleHelsinki

SEA - HEL

SEAHEL

Seattle/Tacoma Intl

Wed 10/22

4:20 pm-11:35 pm

2 stops21h 15m

Helsinki-Vantaa

Wed 10/29

6:15 am-10:25 pm

2 stops25h 10m

$501

SeattleHelsinki

SEA - HEL

SEAHEL

Seattle/Tacoma Intl

Sun 10/5

4:20 pm-3:25 pm

1 stop13h 05m

Helsinki-Vantaa

Tue 10/21

4:05 pm-2:00 pm

1 stop31h 55m

$505

SeattleHelsinki

SEA - HEL

SEAHEL

Seattle/Tacoma Intl

Sun 10/5

3:45 pm-6:20 pm

2 stops16h 35m

Helsinki-Vantaa

Tue 10/21

7:05 am-5:50 pm

2 stops44h 45m

$506

SeattleHelsinki

SEA - HEL

SEAHEL

Seattle/Tacoma Intl

Sun 10/5

4:20 pm-8:15 pm

1 stop17h 55m

Helsinki-Vantaa

Tue 10/21

4:05 pm-2:00 pm

1 stop31h 55m

$514

SeattleHelsinki

SEA - HEL

SEAHEL

Seattle/Tacoma Intl

Sun 10/5

4:20 pm-3:25 pm

1 stop13h 05m

Helsinki-Vantaa

Tue 10/21

9:05 pm-2:00 pm

2 stops26h 55m

$517

SeattleHelsinki

SEA - HEL

SEAHEL

Seattle/Tacoma Intl

Fri 2/27

2:00 pm-1:35 am

2 stops25h 35m

Helsinki-Vantaa

Tue 5/12

6:10 am-11:27 pm

2 stops27h 17m

$518

SeattleHelsinki

SEA - HEL

SEAHEL

Seattle/Tacoma Intl

Sun 10/5

4:20 pm-3:25 pm

1 stop13h 05m

Helsinki-Vantaa

Tue 10/21

9:00 pm-2:00 pm

1 stop27h 00m

$525

SeattleHelsinki

SEA - HEL

SEAHEL

Seattle/Tacoma Intl

Thu 10/2

12:30 pm-6:40 pm

1 stop20h 10m

Helsinki-Vantaa

Tue 10/7

7:35 pm-5:15 pm

1 stop31h 40m

$624

SeattleHelsinki

SEA - HEL

SEAHEL

Seattle/Tacoma Intl

Thu 11/6

7:00 pm-6:05 pm

1 stop37h 05m

Helsinki-Vantaa

Wed 11/12

7:00 pm-5:05 pm

1 stop32h 05m

$626

SeattleHelsinki

SEA - HEL

SEAHEL

Seattle/Tacoma Intl

Wed 11/5

7:00 pm-11:35 am

1 stop30h 35m

Helsinki-Vantaa

Wed 11/12

7:00 pm-5:05 pm

1 stop32h 05m

$639

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Helsinki from

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

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 $537. 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 $554.

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 Sunday when prices can be found for as low as $911. 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 Friday will generally be more expensive and average around $1,086. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

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

According to our data, the cheapest time of day to fly to Helsinki is in the morning. momondo users have found flights departing from Seattle to Helsinki in the morning for as low as $788. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. In the afternoon is when there is more demand to fly to Helsinki, so prices are often more expensive at around $980 per ticket.

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 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 $814 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 $623 on momondo.

What cabin class options are available on Seattle/Tacoma Intl to Helsinki-Vantaa flights?

There are 3 cabin classes available to choose from on Seattle/Tacoma Intl to Helsinki-Vantaa 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 2025, prices for Seattle to Helsinki flights are approximately 32% 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

$469

Direct flights

None
The best one-way flight to Helsinki from Seattle in the past 72 hours is $469. The best round-trip flight deal from Seattle to Helsinki found on momondo in the last 72 hours is $609.
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

  • 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 13h 05m, 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?

  • 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?

  • What is the most popular airline from Seattle to Helsinki?

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 AirlinesPriceFrom $322Free CancellationRating
7.4
1,486 reviews
Search Scandinavian Airlines flights
IcelandairPriceFrom $424Free CancellationRating
7.0
544 reviews
Search Icelandair flights
DeltaPriceFrom $526Free CancellationRating
7.9
7,957 reviews
Search Delta flights
KLMPriceFrom $536Free CancellationRating
7.8
1,386 reviews
Search KLM flights
British AirwaysPriceFrom $574Free CancellationRating
6.7
7,363 reviews
Search British Airways flights
American AirlinesPriceFrom $601Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
FinnairPriceFrom $662Free CancellationRating
7.6
1,324 reviews
Search Finnair flights
LufthansaPriceFrom $696Free CancellationRating
6.8
7,407 reviews
Search Lufthansa flights

Traveling to a place near Helsinki?

Book flights to Helsinki if you plan to visit one of these locations
Vantaa
Espoo
Kotka
Lahti

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.

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