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Cheap flights from Seattle to Helsinki from $339

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 11/23. 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

Enter your travel dates to find the best prices.
Icelandair Logo
2:35 pm - 12:55 pmSEA-HEL
12h 20m1 stop
Icelandair Logo
1:55 pm - 5:00 pmHEL-SEA
13h 05m1 stop
$363Icelandair
Find Deal
Mon, Dec 1 - Mon, Dec 8
Icelandair Logo
2:35 pm - 12:55 pmSEA-HEL
12h 20m1 stop
Icelandair Logo
1:55 pm - 5:00 pmHEL-SEA
13h 05m1 stop
$364Icelandair
Find Deal
Wed, Jan 21 - Sat, Feb 7
Icelandair Logo
2:35 pm - 12:55 pmSEA-HEL
12h 20m1 stop
Icelandair Logo
3:00 pm - 8:45 pmHEL-SEA
15h 45m1 stop
$376Icelandair
Find Deal
Fri, Feb 27 - Tue, May 12
Icelandair Logo
3:35 pm - 12:55 pmSEA-HEL
12h 20m1 stop
Icelandair Logo
3:00 pm - 8:45 pmHEL-SEA
15h 45m1 stop
$400Icelandair
Find Deal
Fri, Mar 27 - Tue, Mar 31
Icelandair Logo
3:45 pm - 2:00 pmSEA-HEL
12h 15m1 stop
Icelandair Logo
3:00 pm - 5:50 pmHEL-SEA
12h 50m1 stop
$428Icelandair
Find Deal
Wed, May 6 - Wed, May 13
Icelandair Logo
7:00 pm - 2:00 pmSEA-HEL
33h 00m1 stop
Icelandair Logo
3:00 pm - 5:50 pmHEL-SEA
12h 50m1 stop
$432Icelandair
Find Deal
Sun, May 3 - Wed, May 13
Scandinavian Airlines Logo
7:10 am - 1:35 amSEA-HEL
32h 25m2 stops
Scandinavian Airlines Logo
6:15 am - 10:52 pmHEL-SEA
26h 37m2 stops
$513Scandinavian Airlines
Find Deal
Wed, Jan 21 - Sat, Feb 7
Icelandair Logo
2:35 pm - 12:55 pmSEA-HEL
12h 20m1 stop
Icelandair Logo
1:55 pm - 5:00 pmHEL-SEA
13h 05m1 stop
$520Icelandair
Find Deal
Fri, Feb 20 - Sun, Mar 1
Scandinavian Airlines Logo
11:31 am - 3:25 pmSEA-HEL
17h 54m2 stops
Scandinavian Airlines Logo
6:10 am - 1:45 pmHEL-SEA
17h 35m1 stop
$530Scandinavian Airlines
Find Deal
Fri, Feb 27 - Fri, May 22
Scandinavian Airlines Logo
7:10 am - 3:25 pmSEA-HEL
22h 15m2 stops
Scandinavian Airlines Logo
6:15 am - 9:59 pmHEL-SEA
25h 44m2 stops
$536Scandinavian Airlines
Find Deal
Wed, Jan 21 - Sun, Feb 8

Icelandair flights from Seattle to Helsinki

Our best Icelandair deals on Seattle to Helsinki flight tickets
Icelandair
Dec 1
SEA2:35 pmSeattle/Tacoma Intl
12h 20m
1 stop
HEL12:55 pmHelsinki-Vantaa
Dec 8
HEL1:55 pmHelsinki-Vantaa
13h 05m
1 stop
SEA5:00 pmSeattle/Tacoma Intl
$363
Find similar
Icelandair
Jan 21
SEA2:35 pmSeattle/Tacoma Intl
12h 20m
1 stop
HEL12:55 pmHelsinki-Vantaa
Feb 7
HEL1:55 pmHelsinki-Vantaa
13h 05m
1 stop
SEA5:00 pmSeattle/Tacoma Intl
$364
Find similar
Icelandair
Feb 27
SEA2:35 pmSeattle/Tacoma Intl
12h 20m
1 stop
HEL12:55 pmHelsinki-Vantaa
May 12
HEL3:00 pmHelsinki-Vantaa
15h 45m
1 stop
SEA8:45 pmSeattle/Tacoma Intl
$376
Find similar

Scandinavian Airlines flights from Seattle to Helsinki

Our best Scandinavian Airlines deals on Seattle to Helsinki flight tickets
Scandinavian Airlines
Jan 21
SEA7:10 amSeattle/Tacoma Intl
32h 25m
2 stops
HEL1:35 amHelsinki-Vantaa
Feb 7
HEL6:15 amHelsinki-Vantaa
26h 37m
2 stops
SEA10:52 pmSeattle/Tacoma Intl
$513
Find similar
Scandinavian Airlines
Feb 27
SEA11:31 amSeattle/Tacoma Intl
17h 54m
2 stops
HEL3:25 pmHelsinki-Vantaa
May 22
HEL6:10 amHelsinki-Vantaa
17h 35m
1 stop
SEA1:45 pmSeattle/Tacoma Intl
$530
Find similar
Scandinavian Airlines
Jan 21
SEA7:10 amSeattle/Tacoma Intl
22h 15m
2 stops
HEL3:25 pmHelsinki-Vantaa
Feb 8
HEL6:15 amHelsinki-Vantaa
25h 44m
2 stops
SEA9:59 pmSeattle/Tacoma Intl
$536
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 November 12, 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

Mon 12/1

2:35 pm-12:55 pm

1 stop12h 20m

Helsinki-Vantaa

Mon 12/8

1:55 pm-5:00 pm

1 stop13h 05m

$363

SeattleHelsinki

SEA - HEL

SEAHEL

Seattle/Tacoma Intl

Wed 1/21

2:35 pm-12:55 pm

1 stop12h 20m

Helsinki-Vantaa

Sat 2/7

1:55 pm-5:00 pm

1 stop13h 05m

$364

SeattleHelsinki

SEA - HEL

SEAHEL

Seattle/Tacoma Intl

Fri 2/27

2:35 pm-12:55 pm

1 stop12h 20m

Helsinki-Vantaa

Tue 5/12

3:00 pm-8:45 pm

1 stop15h 45m

$376

SeattleHelsinki

SEA - HEL

SEAHEL

Seattle/Tacoma Intl

Fri 3/27

3:35 pm-12:55 pm

1 stop12h 20m

Helsinki-Vantaa

Tue 3/31

3:00 pm-8:45 pm

1 stop15h 45m

$400

SeattleHelsinki

SEA - HEL

SEAHEL

Seattle/Tacoma Intl

Wed 5/6

3:45 pm-2:00 pm

1 stop12h 15m

Helsinki-Vantaa

Wed 5/13

3:00 pm-5:50 pm

1 stop12h 50m

$428

SeattleHelsinki

SEA - HEL

SEAHEL

Seattle/Tacoma Intl

Sun 5/3

7:00 pm-2:00 pm

1 stop33h 00m

Helsinki-Vantaa

Wed 5/13

3:00 pm-5:50 pm

1 stop12h 50m

$432

SeattleHelsinki

SEA - HEL

SEAHEL

Seattle/Tacoma Intl

Wed 1/21

7:10 am-1:35 am

2 stops32h 25m

Helsinki-Vantaa

Sat 2/7

6:15 am-10:52 pm

2 stops26h 37m

$513

SeattleHelsinki

SEA - HEL

SEAHEL

Seattle/Tacoma Intl

Fri 2/20

2:35 pm-12:55 pm

1 stop12h 20m

Helsinki-Vantaa

Sun 3/1

1:55 pm-5:00 pm

1 stop13h 05m

$520

SeattleHelsinki

SEA - HEL

SEAHEL

Seattle/Tacoma Intl

Fri 2/27

11:31 am-3:25 pm

2 stops17h 54m

Helsinki-Vantaa

Fri 5/22

6:10 am-1:45 pm

1 stop17h 35m

$530

SeattleHelsinki

SEA - HEL

SEAHEL

Seattle/Tacoma Intl

Wed 1/21

7:10 am-3:25 pm

2 stops22h 15m

Helsinki-Vantaa

Sun 2/8

6:15 am-9:59 pm

2 stops25h 44m

$536

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 $543. 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 Sunday when prices can be found for as low as $912. 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 Tuesday will generally be more expensive and average around $1,118. 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 $959 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 $822 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 $597 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?

You could potentially save up to 8% 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 2025, prices for Seattle to Helsinki flights are approximately 45% 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

$744

Fastest flight time

9h 30m

Direct flights

Tue, Thu and Sun

Airports in Helsinki

1 airport
The best one-way flight to Helsinki from Seattle in the past 72 hours is $744. The best round-trip flight deal from Seattle to Helsinki found on momondo in the last 72 hours is $1,700.
The fastest flight from Seattle to Helsinki takes 9h 30m
Direct flights go from Seattle to Helsinki on Tuesday, Thursday and Sunday. There are no airlines offering direct flights.
There is 1 airport near Helsinki: Helsinki-Vantaa (HEL)
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 12h 15m, 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
1,575 reviews
Search Scandinavian Airlines flights
IcelandairPriceFrom $431Free CancellationRating
7.1
578 reviews
Search Icelandair flights
DeltaPriceFrom $526Free CancellationRating
7.9
8,007 reviews
Search Delta flights
KLMPriceFrom $536Free CancellationRating
7.7
1,410 reviews
Search KLM flights
American AirlinesPriceFrom $601Free CancellationRating
7.2
11,050 reviews
Search American Airlines flights
FinnairPriceFrom $662Free CancellationRating
7.6
1,335 reviews
Search Finnair flights
LufthansaPriceFrom $721Free CancellationRating
6.8
7,570 reviews
Search Lufthansa flights
British AirwaysPriceFrom $725Free CancellationRating
6.7
7,516 reviews
Search British Airways flights

Traveling to a place near Helsinki?

Book flights to Helsinki if you plan to visit one of these locations
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.

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