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$356+ 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 8/19. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — HEL
Apr 27 — May 41
Sun 4/27
Sun 5/4
1 adult, Economy
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1. Tell us where you want to go

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Cheapflights Tip: The best prices from Seattle/Tacoma Intl to Helsinki-Vantaa are usually found in January or November, booked 36 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 22, 2025.

Most accurate provider

AranGrant
3 stars

Most trusted provider

AranGrant
3 stars

Round-trip from

$543
(Ticket)

One-way from

$356
(Kiwi.com)

Popular in

July

Cheapest in

January

Average price

$897

Good round-trip deal

$783 or less

Good one-way deal

$563 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. 21% potential increase in price ($242 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($31 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 22, 2025.

This Delta deal was found by Cheapflights users on 4/21. 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.
Sun 8/31:30 pmSEA - HEL
1 stop17h 10mDelta
Tue 8/127:10 amHEL - SEA
2 stops22h 29mDelta
Deal found 4/21$622
This SmartFares deal was found by Cheapflights users on 4/22. 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/244:00 pmSEA - HEL
1 stop13h 25mScandinavian Airlines
Sun 8/319:00 pmHEL - SEA
1 stop26h 50mScandinavian Airlines
Deal found 4/22$631
This FlightHub deal was found by Cheapflights users on 4/21. 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.
Sun 8/37:10 pmSEA - HEL
1 stop37h 30mTurkish Airlines
Tue 8/127:35 pmHEL - SEA
1 stop31h 40mTurkish Airlines
Deal found 4/21$641
This KAYAK deal was found by Cheapflights users on 4/21. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/12:35 pmSEA - HEL
2 stops23h 10mMultiple Airlines
Mon 12/154:05 pmHEL - SEA
2 stops34h 55mMultiple Airlines
Deal found 4/21$721
This oojo deal was found by Cheapflights users on 4/21. 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 4/21$730
This Flightnetwork deal was found by Cheapflights users on 4/21. 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 Flightnetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/125:40 pmSEA - HEL
Nonstop9h 30mFinnair
Wed 5/284:20 pmHEL - SEA
Nonstop9h 40mFinnair
Deal found 4/21$887
This Ticket deal was found by Cheapflights users on 4/21. 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 Ticket is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/125:30 amSEA - HEL
2 stops27h 25mAir Canada
Wed 5/286:00 amHEL - SEA
2 stops37h 18mAir Canada
Deal found 4/21$917
This American Airlines deal was found by Cheapflights users on 4/21. 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.
Mon 5/1211:36 amSEA - HEL
1 stop17h 24mAmerican Airlines
Wed 5/284:20 pmHEL - SEA
Nonstop9h 40mAmerican Airlines
Deal found 4/21$928
This Lufthansa deal was found by Cheapflights users on 4/21. 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 Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/236:50 pmSEA - HEL
1 stop14h 05mLufthansa
Tue 8/56:10 amHEL - SEA
1 stop15h 45mLufthansa
Deal found 4/21$1,068
This United Airlines deal was found by Cheapflights users on 4/21. 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 Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/222:20 pmSEA - HEL
1 stop16h 30mUnited Airlines
Fri 8/86:00 amHEL - SEA
1 stop20h 59mUnited Airlines
Deal found 4/21$1,069

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 22, 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 8/3

1:30 pm-4:40 pm

1 stop17h 10m

Helsinki-Vantaa

Tue 8/12

7:10 am-7:39 pm

2 stops22h 29m

$622

SeattleHelsinki

SEA - HEL

SEAHEL

Seattle/Tacoma Intl

Sun 8/24

4:00 pm-3:25 pm

1 stop13h 25m

Helsinki-Vantaa

Sun 8/31

9:00 pm-1:50 pm

1 stop26h 50m

$631

SeattleHelsinki

SEA - HEL

SEAHEL

Seattle/Tacoma Intl

Sun 8/3

7:10 pm-6:40 pm

1 stop37h 30m

Helsinki-Vantaa

Tue 8/12

7:35 pm-5:15 pm

1 stop31h 40m

$641

SeattleHelsinki

SEA - HEL

SEAHEL

Seattle/Tacoma Intl

Wed 6/4

4:00 pm-12:05 am

2 stops22h 05m

Helsinki-Vantaa

Wed 6/11

7:05 am-1:50 pm

2 stops16h 45m

$760

SeattleHelsinki

SEA - HEL

SEAHEL

Seattle/Tacoma Intl

Sun 8/3

11:30 pm-10:00 am

2 stops24h 30m

Helsinki-Vantaa

Tue 8/12

11:55 am-11:25 am

2 stops33h 30m

$771

SeattleHelsinki

SEA - HEL

SEAHEL

Seattle/Tacoma Intl

Mon 5/12

5:40 pm-1:10 pm

Nonstop9h 30m

Helsinki-Vantaa

Wed 5/28

4:20 pm-4:00 pm

Nonstop9h 40m

$887

SeattleHelsinki

SEA - HEL

SEAHEL

Seattle/Tacoma Intl

Mon 5/12

5:30 am-6:55 pm

2 stops27h 25m

Helsinki-Vantaa

Wed 5/28

6:00 am-9:18 am

2 stops37h 18m

$917

SeattleHelsinki

SEA - HEL

SEAHEL

Seattle/Tacoma Intl

Mon 5/12

11:36 am-3:00 pm

1 stop17h 24m

Helsinki-Vantaa

Wed 5/28

4:20 pm-4:00 pm

Nonstop9h 40m

$928

SeattleHelsinki

SEA - HEL

SEAHEL

Seattle/Tacoma Intl

Wed 7/23

6:50 pm-6:55 pm

1 stop14h 05m

Helsinki-Vantaa

Tue 8/5

6:10 am-11:55 am

1 stop15h 45m

$1,068

SeattleHelsinki

SEA - HEL

SEAHEL

Seattle/Tacoma Intl

Tue 7/22

2:20 pm-4:50 pm

1 stop16h 30m

Helsinki-Vantaa

Fri 8/8

6:00 am-4:59 pm

1 stop20h 59m

$1,069

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/20

Showing 1-10 of 21 results
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2
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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*2 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy3 starsTrust Score*3 stars
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 AranGrant to be most consistent on Cheapflights vs. AranGrant Users can find the same prices on Seattle-Helsinki flight deals on Cheapflights vs. AranGrant >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 AranGrant the most. AranGrant 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 April 18, 2025.

The best time to book flights from Seattle to Helsinki is 36 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 22, 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 22, 2025.
Delta
8.0
Very good
7,920 reviews

Overall

8.0

Comfort

7.9

Boarding

8.2

Food

7.3

Entertainment

7.9

Crew

8.5

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
7,920 reviews
Delta
8.0
Very good
7,920 reviews

Overall

8.0

Comfort

7.9

Boarding

8.2

Food

7.3

Entertainment

7.9

Crew

8.5

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
1,272 reviews
Delta
8.0
Very good
7,920 reviews

Overall

8.0

Comfort

7.9

Boarding

8.2

Food

7.3

Entertainment

7.9

Crew

8.5

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
1,441 reviews
Delta
8.0
Very good
7,920 reviews

Overall

8.0

Comfort

7.9

Boarding

8.2

Food

7.3

Entertainment

7.9

Crew

8.5

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.
United Airlines
7.4
Good
8,684 reviews
Delta
8.0
Very good
7,920 reviews

Overall

8.0

Comfort

7.9

Boarding

8.2

Food

7.3

Entertainment

7.9

Crew

8.5

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.
Turkish Airlines
7.3
Good
3,773 reviews
Delta
8.0
Very good
7,920 reviews

Overall

8.0

Comfort

7.9

Boarding

8.2

Food

7.3

Entertainment

7.9

Crew

8.5

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 $580. Other airlines that can offer you cheap pricing are Scandinavian Airlines, from $631, and Turkish Airlines, from $686. Users have found that Delta is 36% 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 Air France ($472), Delta ($476), and Turkish Airlines ($491).

  • 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 $2,062. The most popular route, (Seattle/Tacoma Intl - Helsinki-Vantaa), can usually be booked for $622.

  • 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 22, 2025.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest$481Average$883FlexibilityNo cancel feeOn-time76%
LufthansaCheapest$549Average$962FlexibilityNo cancel feeOn-time76%
FinnairCheapest$559Average$1,073FlexibilityNo cancel feeOn-time76%
British AirwaysCheapest$569Average$1,205FlexibilityNo cancel feeOn-time70%
United AirlinesCheapest$583Average$986FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$658Average$1,143FlexibilityNo cancel feeOn-time71%
DeltaCheapest$721Average$1,239FlexibilityNo cancel feeOn-timeN/A

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