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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.
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0 bags

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Cheap round-trip flights

Enter your travel dates to find the best prices.
Scandinavian Airlines Logo
7:10 am - 3:25 pmSEA-HEL
22h 15m2 stops
Scandinavian Airlines Logo
6:15 am - 10:52 pmHEL-SEA
26h 37m2 stops
$513Scandinavian Airlines
Find Deal
Wed, Jan 21 - Sat, Feb 7
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
Scandinavian Airlines Logo
11:30 am - 3:25 pmSEA-HEL
17h 55m2 stops
Scandinavian Airlines Logo
11:20 am - 11:23 pmHEL-SEA
22h 03m2 stops
$537Scandinavian Airlines
Find Deal
Thu, Jan 22 - Thu, Feb 12
Scandinavian Airlines Logo
2:02 pm - 1:35 amSEA-HEL
25h 33m2 stops
Scandinavian Airlines Logo
7:00 am - 6:58 pmHEL-SEA
21h 58m3 stops
$543Scandinavian Airlines
Find Deal
Wed, Jan 21 - Sun, Feb 8
Scandinavian Airlines Logo
2:02 pm - 8:20 pmSEA-HEL
20h 18m2 stops
Scandinavian Airlines Logo
6:55 am - 6:58 pmHEL-SEA
22h 03m3 stops
$544Scandinavian Airlines
Find Deal
Fri, Jan 23 - Sun, Feb 8
Scandinavian Airlines Logo
2:05 pm - 10:40 amSEA-HEL
34h 35m2 stops
Scandinavian Airlines Logo
4:05 pm - 7:00 pmHEL-SEA
36h 55m2 stops
$548Scandinavian Airlines
Find Deal
Thu, Dec 4 - Sat, Dec 13
Scandinavian Airlines Logo
7:10 am - 3:25 pmSEA-HEL
22h 15m2 stops
Scandinavian Airlines Logo
6:10 am - 11:27 pmHEL-SEA
27h 17m2 stops
$559Scandinavian Airlines
Find Deal
Fri, Feb 27 - Tue, May 12
Scandinavian Airlines Logo
11:31 am - 3:25 pmSEA-HEL
17h 54m2 stops
Scandinavian Airlines Logo
6:15 am - 10:25 pmHEL-SEA
26h 10m2 stops
$567Scandinavian Airlines
Find Deal
Fri, Feb 20 - Sun, Mar 1
Scandinavian Airlines Logo
2:04 pm - 8:20 pmSEA-HEL
20h 16m2 stops
Scandinavian Airlines Logo
6:15 am - 10:16 pmHEL-SEA
25h 01m2 stops
$600Scandinavian Airlines
Find Deal
Sun, Mar 1 - Sat, Mar 14

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
22h 15m
2 stops
HEL3:25 pmHelsinki-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

Icelandair flights from Seattle to Helsinki

Our best Icelandair deals on Seattle to Helsinki flight tickets
Icelandair
Nov 27
SEA2:35 pmSeattle/Tacoma Intl
12h 20m
1 stop
HEL12:55 pmHelsinki-Vantaa
Dec 10
HEL1:55 pmHelsinki-Vantaa
13h 05m
1 stop
SEA5:00 pmSeattle/Tacoma Intl
$642
Find similar
Icelandair
Jan 8
SEA2:35 pmSeattle/Tacoma Intl
12h 20m
1 stop
HEL12:55 pmHelsinki-Vantaa
Jan 17
HEL1:55 pmHelsinki-Vantaa
13h 05m
1 stop
SEA5:00 pmSeattle/Tacoma Intl
$647
Find similar
Icelandair
Nov 30
SEA2:35 pmSeattle/Tacoma Intl
12h 20m
1 stop
HEL12:55 pmHelsinki-Vantaa
Dec 6
HEL1:55 pmHelsinki-Vantaa
13h 05m
1 stop
SEA5:00 pmSeattle/Tacoma Intl
$653
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 13, 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 1/21

7:10 am-3:25 pm

2 stops22h 15m

Helsinki-Vantaa

Sat 2/7

6:15 am-10:52 pm

2 stops26h 37m

$513

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

SeattleHelsinki

SEA - HEL

SEAHEL

Seattle/Tacoma Intl

Thu 1/22

11:30 am-3:25 pm

2 stops17h 55m

Helsinki-Vantaa

Thu 2/12

11:20 am-11:23 pm

2 stops22h 03m

$537

SeattleHelsinki

SEA - HEL

SEAHEL

Seattle/Tacoma Intl

Wed 1/21

2:02 pm-1:35 am

2 stops25h 33m

Helsinki-Vantaa

Sun 2/8

7:00 am-6:58 pm

3 stops21h 58m

$543

SeattleHelsinki

SEA - HEL

SEAHEL

Seattle/Tacoma Intl

Fri 1/23

2:02 pm-8:20 pm

2 stops20h 18m

Helsinki-Vantaa

Sun 2/8

6:55 am-6:58 pm

3 stops22h 03m

$544

SeattleHelsinki

SEA - HEL

SEAHEL

Seattle/Tacoma Intl

Thu 12/4

2:05 pm-10:40 am

2 stops34h 35m

Helsinki-Vantaa

Sat 12/13

4:05 pm-7:00 pm

2 stops36h 55m

$548

SeattleHelsinki

SEA - HEL

SEAHEL

Seattle/Tacoma Intl

Fri 2/27

7:10 am-3:25 pm

2 stops22h 15m

Helsinki-Vantaa

Tue 5/12

6:10 am-11:27 pm

2 stops27h 17m

$559

SeattleHelsinki

SEA - HEL

SEAHEL

Seattle/Tacoma Intl

Fri 2/20

11:31 am-3:25 pm

2 stops17h 54m

Helsinki-Vantaa

Sun 3/1

6:15 am-10:25 pm

2 stops26h 10m

$567

SeattleHelsinki

SEA - HEL

SEAHEL

Seattle/Tacoma Intl

Sun 3/1

2:04 pm-8:20 pm

2 stops20h 16m

Helsinki-Vantaa

Sat 3/14

6:15 am-10:16 pm

2 stops25h 01m

$600

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

Direct flights

None
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.
There are no direct flights from Seattle to Helsinki. There are no popular flight routes from Seattle to Helsinki.
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 20m, 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
1,411 reviews
Search KLM flights
American AirlinesPriceFrom $601Free CancellationRating
7.2
11,051 reviews
Search American Airlines flights
FinnairPriceFrom $662Free CancellationRating
7.6
1,334 reviews
Search Finnair flights
LufthansaPriceFrom $721Free CancellationRating
6.8
7,572 reviews
Search Lufthansa flights
British AirwaysPriceFrom $725Free CancellationRating
6.7
7,521 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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