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$343+ Cheap flights from Seattle (SEA) to Helsinki (HEL)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 5/25. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — HEL
Apr 8 — Apr 151
Tue 4/8
Tue 4/15
1 adult, Economy
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Cheapflights Tip: The best prices from Seattle/Tacoma Intl to Helsinki-Vantaa are usually found in January or November, booked 81 days in advance, depart on a Sunday or Monday and return on a Monday

Cheap flight deals from Seattle to Helsinki

Discover tips and strategies to find the most affordable flight options for your journey from Seattle (SEA) to Helsinki (HEL). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated April 3, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$448
(Scandinavian Airlines)

One-way from

$343
(Kiwi.com)

Popular in

July

Cheapest in

January

Average price

$877

Good round-trip deal

$827 or less

Good one-way deal

$560 or less
Provider with most accurate pricing for Seattle/Tacoma Intl-Helsinki-Vantaa flight deals.
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Provider most trusted by Cheapflights users for Seattle/Tacoma Intl-Helsinki-Vantaa flights.
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From Seattle/Tacoma Intl to Helsinki-Vantaa
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One-way flight from Seattle/Tacoma Intl to Helsinki-Vantaa
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Highest demand for flights based on searches. 20% potential increase in price ($237 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($30 potential savings vs. average RT price).
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Average for round-trip flights in April 2025
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Price to beat on a round-trip flight from Seattle/Tacoma Intl to Helsinki-Vantaa.
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Price to beat on a one-way flight from Seattle/Tacoma Intl to Helsinki-Vantaa.
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Find flight deals from Seattle to Helsinki

Cheapest flights from Seattle to Helsinki
Explore the most affordable flight options available from Seattle to Helsinki. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 3, 2025.

This Scandinavian Airlines deal was found by Cheapflights users on 4/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Scandinavian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 6/14:00 pmSEA - HEL
1 stop22h 05mScandinavian Airlines
Mon 6/96:35 amHEL - SEA
1 stop17h 15mScandinavian Airlines
Deal found 4/2$448
This oojo deal was found by Cheapflights users on 4/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/142:35 pmSEA - HEL
1 stop12h 25mIcelandair
Fri 11/212:00 pmHEL - SEA
1 stop13h 00mIcelandair
Deal found 4/2$484
This KLM deal was found by Cheapflights users on 4/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/96:40 pmSEA - HEL
1 stop18h 40mMultiple Airlines
Wed 4/236:25 pmHEL - SEA
1 stop27h 20mMultiple Airlines
Deal found 4/2$595
This Delta deal was found by Cheapflights users on 4/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/810:25 amSEA - HEL
2 stops20h 15mDelta
Fri 4/187:00 amHEL - SEA
1 stop19h 00mDelta
Deal found 4/2$599
This KLM deal was found by Cheapflights users on 4/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/86:10 pmSEA - HEL
1 stop20h 10mKLM
Fri 4/187:00 amHEL - SEA
1 stop19h 00mKLM
Deal found 4/2$600
This American Airlines deal was found by Cheapflights users on 4/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/3011:20 amSEA - HEL
1 stop16h 55mAmerican Airlines
Wed 5/712:35 pmHEL - SEA
1 stop20h 22mAmerican Airlines
Deal found 4/2$627
This Justfly.com deal was found by Cheapflights users on 4/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/1410:35 amSEA - HEL
2 stops22h 05mAir Canada
Fri 11/217:00 amHEL - SEA
2 stops17h 30mAir Canada
Deal found 4/2$636
This United deal was found by Cheapflights users on 4/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/143:10 pmSEA - HEL
1 stop22h 15mUnited Airlines
Fri 11/217:00 amHEL - SEA
2 stops37h 40mUnited Airlines
Deal found 4/2$642
This Travelocity deal was found by Cheapflights users on 4/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/253:10 pmSEA - HEL
1 stop17h 30mLufthansa
Tue 12/96:50 amHEL - SEA
1 stop16h 30mLufthansa
Deal found 4/2$650
This FlightHub deal was found by Cheapflights users on 4/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/307:10 pmSEA - HEL
1 stop30h 30mTurkish Airlines
Fri 9/57:35 pmHEL - SEA
1 stop25h 00mTurkish Airlines
Deal found 4/2$657
This StudentUniverse deal was found by Cheapflights users on 4/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure StudentUniverse is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/21:51 pmSEA - HEL
1 stop15h 09mFinnair
Fri 5/94:50 pmHEL - SEA
1 stop17h 55mFinnair
Deal found 4/2$669
This Expedia deal was found by Cheapflights users on 4/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/11:51 pmSEA - HEL
2 stops21h 09mBritish Airways
Thu 5/84:50 pmHEL - SEA
1 stop17h 55mBritish Airways
Deal found 4/2$746

Cheapflights 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, Cheapflights users made 2,558,603 searches. Data last updated April 3, 2025.
Use the filters below to find and compare flights from Seattle to Helsinki that are best for you.

Fly from

Seattle

Fly to

Helsinki

Route

Depart

Return

Price

SeattleHelsinki

SEA - HEL

SEAHEL

Seattle/Tacoma Intl

Sun 6/1

4:00 pm-12:05 am

1 stop22h 05m

Helsinki-Vantaa

Mon 6/9

6:35 am-1:50 pm

1 stop17h 15m

$448

SeattleHelsinki

SEA - HEL

SEAHEL

Seattle/Tacoma Intl

Tue 4/22

6:10 pm-12:20 am

1 stop20h 10m

Helsinki-Vantaa

Mon 4/28

6:25 pm-4:00 pm

1 stop31h 35m

$600

SeattleHelsinki

SEA - HEL

SEAHEL

Seattle/Tacoma Intl

Wed 4/30

6:20 am-1:00 pm

2 stops20h 40m

Helsinki-Vantaa

Wed 5/7

7:00 am-3:57 pm

1 stop18h 57m

$604

SeattleHelsinki

SEA - HEL

SEAHEL

Seattle/Tacoma Intl

Wed 4/30

11:20 am-2:15 pm

1 stop16h 55m

Helsinki-Vantaa

Wed 5/7

12:35 pm-10:57 pm

1 stop20h 22m

$627

SeattleHelsinki

SEA - HEL

SEAHEL

Seattle/Tacoma Intl

Sat 8/30

7:10 pm-11:40 am

1 stop30h 30m

Helsinki-Vantaa

Fri 9/5

7:35 pm-10:35 am

1 stop25h 00m

$657

SeattleHelsinki

SEA - HEL

SEAHEL

Seattle/Tacoma Intl

Thu 5/1

1:51 pm-3:00 pm

1 stop15h 09m

Helsinki-Vantaa

Thu 5/8

4:40 pm-4:00 pm

Nonstop9h 20m

$662

SeattleHelsinki

SEA - HEL

SEAHEL

Seattle/Tacoma Intl

Mon 5/5

7:00 pm-2:00 pm

1 stop33h 00m

Helsinki-Vantaa

Wed 5/21

3:00 pm-11:25 am

1 stop30h 25m

$709

SeattleHelsinki

SEA - HEL

SEAHEL

Seattle/Tacoma Intl

Mon 5/5

2:00 pm-3:20 pm

1 stop15h 20m

Helsinki-Vantaa

Wed 5/21

4:40 pm-4:00 pm

Nonstop9h 20m

$717

SeattleHelsinki

SEA - HEL

SEAHEL

Seattle/Tacoma Intl

Thu 5/1

1:51 pm-9:00 pm

2 stops21h 09m

Helsinki-Vantaa

Thu 5/8

4:50 pm-12:45 am

1 stop17h 55m

$746

SeattleHelsinki

SEA - HEL

SEAHEL

Seattle/Tacoma Intl

Sun 5/18

5:30 am-6:55 pm

2 stops27h 25m

Helsinki-Vantaa

Thu 5/29

6:10 am-7:37 pm

2 stops23h 27m

$906

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/2

Showing 1-10 of 21 results
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Compare providers for flights from Seattle to Helsinki

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Seattle to Helsinki in April.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy3 starsTrust Score*1 star
CheapflightsfaresPrice Accuracy3 starsTrust Score*2 stars
MytripPrice Accuracy3 starsTrust Score*3 stars
FlightnetworkPrice Accuracy2 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Seattle-Helsinki flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Seattle-Helsinki flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Seattle-Helsinki flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Seattle-Helsinki flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Seattle-Helsinki flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Seattle to Helsinki

Have a flexible travel schedule? Discover the best time to fly to Helsinki from Seattle with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Seattle to Helsinki

How far ahead should I book a flight from Seattle to Helsinki?

Use this chart to determine the optimal time to book a round-trip flight from Seattle to Helsinki. Price data was last updated on March 28, 2025.

The best time to book flights from Seattle to Helsinki is 81 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

What is the cheapest month to book a flight from Seattle to Helsinki?

Currently, November is the cheapest month in which you can book a flight from Seattle to Helsinki (average of $444). Flying from Seattle to Helsinki in June is currently the most expensive (average of $1,123). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from SEA to HEL?

Find hourly flight availability from Seattle to Helsinki. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated April 3, 2025.

It’s optimal to fly from Seattle to Helsinki in the morning. By choosing this option you can save up to 27% on the cost of your flight, compared to a flight in the afternoon.

What is the cheapest day to fly from Seattle to Helsinki?

Use this chart to determine the cheapest time to fly round-trip from Seattle to Helsinki. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Seattle to Helsinki flight should consider departing on Tuesday at noon when fares are most often at their lowest. Friday evenings flights should be avoided if possible as fares are typically the most expensive at this time.

Rainfall in Helsinki by month

Plan your trip to Helsinki by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Helsinki ranges from 1.2 - 2.8 inches per month. August is typically the wettest month, when rainfall can reach 2.8 in. February is typically the driest time to visit Helsinki when rainfall is around 1.2 in.

Temperature in Helsinki by month

Plan your trip to Helsinki by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Helsinki, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 60.8 F. Travelers looking to avoid the cold should look outside of February, when temperatures are typically at their lowest (around 21.2 F).

Reviews of airlines servicing Helsinki

Get insights into the airlines that provide service to Helsinki. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Helsinki. Reviews last updated April 3, 2025.
Delta
8.0
Very good
7,897 reviews

Crew

8.5

Food

7.3

Boarding

8.2

Comfort

7.9

Overall

8.0

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Delta
8.0
Very good
7,897 reviews
Delta
8.0
Very good
7,897 reviews

Crew

8.5

Food

7.3

Boarding

8.2

Comfort

7.9

Overall

8.0

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
KLM
7.8
Good
1,323 reviews
Delta
8.0
Very good
7,897 reviews

Crew

8.5

Food

7.3

Boarding

8.2

Comfort

7.9

Overall

8.0

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Finnair
7.6
Good
1,267 reviews
Delta
8.0
Very good
7,897 reviews

Crew

8.5

Food

7.3

Boarding

8.2

Comfort

7.9

Overall

8.0

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Cathay Pacific
7.5
Good
842 reviews
Delta
8.0
Very good
7,897 reviews

Crew

8.5

Food

7.3

Boarding

8.2

Comfort

7.9

Overall

8.0

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Air France
7.4
Good
1,427 reviews
Delta
8.0
Very good
7,897 reviews

Crew

8.5

Food

7.3

Boarding

8.2

Comfort

7.9

Overall

8.0

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Related info for your journey

Find useful and relevant information for your journey from Seattle to Helsinki. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How popular is this Seattle to Helsinki flight route?

    This flight path from Seattle/Tacoma Intl to Helsinki-Vantaa was viewed by 5 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

  • What are the cheapest airlines flying from Seattle to Helsinki round-trip?

    Cheapflights users have booked flights from Seattle to Helsinki round-trip from $448. Other airlines that can offer you cheap pricing are KLM, from $600, and Delta, from $604. Users have found that Scandinavian Airlines is 50% cheaper than the other options available to this destination.

  • What are the cheapest airlines to fly from Seattle to Helsinki one-way?

    The cheapest airlines for a one-way flight from Seattle to Helsinki are Scandinavian Airlines ($457), Turkish Airlines ($480), and American Airlines ($618).

  • What are the cheapest flights from Seattle to Helsinki?

    The cheapest flight price from Seattle to Helsinki is $471. On average you can expect to pay $2,043. The most popular route, (Seattle/Tacoma Intl - Helsinki-Vantaa), can usually be booked for $448.

  • Can I find deals for flights from Seattle to Helsinki that include hotel bookings?

    Yes. In addition to deals on Seattle to Helsinki flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Seattle to Helsinki?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Seattle to Helsinki.

  • Can I find deals for business class flights from Seattle to Helsinki?

    Yes. Cheapflights offers flight deals from Seattle to Helsinki by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Seattle to Helsinki?

    Currently, November is the cheapest month in which you can book a flight from Seattle to Helsinki (average of $444). Flying from Seattle to Helsinki in June is currently the most expensive (average of $1,123). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near Seattle?

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

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Alternative routes for Seattle to Helsinki

See prices for flight routes from nearby airports that may be better suited for you.
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Top 7 airlines flying from Seattle to Helsinki

Discover the top 7 airlines that operate flights from Seattle to Helsinki. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated April 3, 2025.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest$482Average$911FlexibilityNo cancel feeOn-time76%
LufthansaCheapest$549Average$962FlexibilityNo cancel feeOn-time76%
FinnairCheapest$559Average$1,079FlexibilityNo cancel feeOn-time76%
British AirwaysCheapest$569Average$1,132FlexibilityNo cancel feeOn-time70%
United AirlinesCheapest$583Average$986FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$658Average$1,177FlexibilityNo cancel feeOn-time71%
DeltaCheapest$721Average$1,239FlexibilityNo cancel feeOn-timeN/A

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