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$267+ 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 9/15. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — HEL
Jun 23 — Jun 301
Mon 6/23
Mon 6/30
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 85 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 June 18, 2025.

Round-trip from

$437
(Cheapflightsfares)

One-way from

$267
(Mytrip)

Popular in

July

Cheapest in

January

Average price

$1,104

Good round-trip deal

$659 or less

Good one-way deal

$532 or less
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. 19% potential increase in price ($208 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($27 potential savings vs. average RT price).
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Average for round-trip flights in June 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 June 18, 2025.

This Cheapflightsfares deal was found by Cheapflights users on 6/16. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/104:00 pmSEA - HEL
1 stop13h 25mScandinavian Airlines
Fri 9/1911:15 amHEL - SEA
1 stop12h 45mScandinavian Airlines
Deal found 6/16$437
This Trip.com deal was found by Cheapflights users on 6/18. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/133:45 pmSEA - HEL
2 stops21h 20mMultiple Airlines
Mon 8/257:05 amHEL - SEA
2 stops20h 45mMultiple Airlines
Deal found 6/18$517
This FlightHub deal was found by Cheapflights users on 6/18. 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.
Thu 8/2812:30 pmSEA - HEL
1 stop37h 10mTurkish Airlines
Tue 9/912:35 pmHEL - SEA
1 stop38h 40mTurkish Airlines
Deal found 6/18$623
This oojo deal was found by Cheapflights users on 6/18. 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 6/18$646
This Air Canada deal was found by Cheapflights users on 6/18. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/2510:00 amSEA - HEL
2 stops22h 40mAir Canada
Tue 12/97:05 amHEL - SEA
3 stops25h 01mAir Canada
Deal found 6/18$700
This British Airways deal was found by Cheapflights users on 6/16. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/2511:45 amSEA - HEL
2 stops17h 30mBritish Airways
Tue 12/912:30 pmHEL - SEA
1 stop16h 26mBritish Airways
Deal found 6/16$705
This United Airlines deal was found by Cheapflights users on 6/17. 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.
Mon 8/45:10 pmSEA - HEL
2 stops39h 45mUnited Airlines
Wed 8/206:10 amHEL - SEA
2 stops39h 57mUnited Airlines
Deal found 6/17$708
This Delta deal was found by Cheapflights users on 6/16. 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 11/167:20 amSEA - HEL
2 stops22h 40mDelta
Fri 11/286:30 amHEL - SEA
1 stop16h 45mDelta
Deal found 6/16$719
This Finnair deal was found by Cheapflights users on 6/17. 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 Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/215:40 pmSEA - HEL
Nonstop9h 30mFinnair
Tue 9/212:35 pmHEL - SEA
1 stop16h 41mFinnair
Deal found 6/17$806
This American Airlines deal was found by Cheapflights users on 6/18. 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.
Sat 11/151:33 amSEA - HEL
1 stop23h 12mAmerican Airlines
Fri 11/287:50 amHEL - SEA
1 stop19h 05mAmerican Airlines
Deal found 6/18$838

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 June 18, 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

Wed 9/10

4:00 pm-3:25 pm

1 stop13h 25m

Helsinki-Vantaa

Fri 9/19

11:15 am-2:00 pm

1 stop12h 45m

$437

SeattleHelsinki

SEA - HEL

SEAHEL

Seattle/Tacoma Intl

Wed 8/13

3:45 pm-11:05 pm

2 stops21h 20m

Helsinki-Vantaa

Mon 8/25

7:05 am-5:50 pm

2 stops20h 45m

$517

SeattleHelsinki

SEA - HEL

SEAHEL

Seattle/Tacoma Intl

Thu 8/28

12:30 pm-11:40 am

1 stop37h 10m

Helsinki-Vantaa

Tue 9/9

12:35 pm-5:15 pm

1 stop38h 40m

$623

SeattleHelsinki

SEA - HEL

SEAHEL

Seattle/Tacoma Intl

Fri 11/14

2:35 pm-1:00 pm

1 stop12h 25m

Helsinki-Vantaa

Fri 11/21

2:00 pm-5:00 pm

1 stop13h 00m

$646

SeattleHelsinki

SEA - HEL

SEAHEL

Seattle/Tacoma Intl

Tue 11/25

10:00 am-6:40 pm

2 stops22h 40m

Helsinki-Vantaa

Tue 12/9

7:05 am-10:06 pm

3 stops25h 01m

$700

SeattleHelsinki

SEA - HEL

SEAHEL

Seattle/Tacoma Intl

Tue 11/25

11:45 am-3:15 pm

2 stops17h 30m

Helsinki-Vantaa

Tue 12/9

12:30 pm-6:56 pm

1 stop16h 26m

$705

SeattleHelsinki

SEA - HEL

SEAHEL

Seattle/Tacoma Intl

Mon 8/4

5:10 pm-6:55 pm

2 stops39h 45m

Helsinki-Vantaa

Wed 8/20

6:10 am-12:07 pm

2 stops39h 57m

$708

SeattleHelsinki

SEA - HEL

SEAHEL

Seattle/Tacoma Intl

Sun 11/16

7:20 am-4:00 pm

2 stops22h 40m

Helsinki-Vantaa

Fri 11/28

6:30 am-1:15 pm

1 stop16h 45m

$719

SeattleHelsinki

SEA - HEL

SEAHEL

Seattle/Tacoma Intl

Thu 8/21

5:40 pm-1:10 pm

Nonstop9h 30m

Helsinki-Vantaa

Tue 9/2

12:35 pm-7:16 pm

1 stop16h 41m

$806

SeattleHelsinki

SEA - HEL

SEAHEL

Seattle/Tacoma Intl

Sat 11/15

1:33 am-10:45 am

1 stop23h 12m

Helsinki-Vantaa

Fri 11/28

7:50 am-4:55 pm

1 stop19h 05m

$838

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/17

Showing 1-10 of 19 results
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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 June 13, 2025.

The best time to book flights from Seattle to Helsinki is 85 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 $1,084). 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 June 18, 2025.

It’s optimal to fly from Seattle to Helsinki in the morning. By choosing this option you can save up to 23% on the cost of your flight, compared to a flight in the afternoon.

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 June 18, 2025.
Read reviews from past customers who have flown Delta, Finnair and United Airlines from Seattle to Helsinki. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,964 reviews

Crew

8.5

Entertainment

7.9

Overall

8.0

Boarding

8.2

Comfort

7.9

Food

7.3

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Delta
8.0
Very good
7,964 reviews
Delta
8.0
Very good
7,964 reviews

Crew

8.5

Entertainment

7.9

Overall

8.0

Boarding

8.2

Comfort

7.9

Food

7.3

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Finnair
7.6
Good
1,292 reviews
Delta
8.0
Very good
7,964 reviews

Crew

8.5

Entertainment

7.9

Overall

8.0

Boarding

8.2

Comfort

7.9

Food

7.3

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
United Airlines
7.4
Good
8,810 reviews
Delta
8.0
Very good
7,964 reviews

Crew

8.5

Entertainment

7.9

Overall

8.0

Boarding

8.2

Comfort

7.9

Food

7.3

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Turkish Airlines
7.3
Good
3,853 reviews
Delta
8.0
Very good
7,964 reviews

Crew

8.5

Entertainment

7.9

Overall

8.0

Boarding

8.2

Comfort

7.9

Food

7.3

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Scandinavian Airlines
7.3
Good
1,393 reviews
Delta
8.0
Very good
7,964 reviews

Crew

8.5

Entertainment

7.9

Overall

8.0

Boarding

8.2

Comfort

7.9

Food

7.3

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

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.

  • What airports do I use to fly from Seattle to Helsinki?

    To fly from Seattle to Helsinki, you need to book a flight from Seattle/Tacoma Intl (SEA) to Helsinki-Vantaa (HEL). Nonstop flights to Helsinki-Vantaa from Seattle/Tacoma Intl take 9h 30m on average. When it comes time to book airfare, you have a few options: there are 2 outbound flights from Seattle/Tacoma Intl to Helsinki-Vantaa offered by 7 different airlines.

  • How popular is this Seattle to Helsinki flight route?

    This flight path from Seattle/Tacoma Intl to Helsinki-Vantaa was viewed by 4 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 $437. Other airlines that can offer you cheap pricing are Turkish Airlines, from $623, and Icelandair, from $646. Users have found that Scandinavian Airlines is 49% 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 Icelandair ($383), Finnair ($408), and Turkish Airlines ($481).

  • What are the most reliable airlines from Seattle to Helsinki?

    Consider American Airlines (37%), Alaska Airlines (37%) or Finnair (37%) when booking your flight. These represent the most reliable airlines when flying from Seattle to Helsinki.

  • What are the cheapest flights from Seattle to Helsinki?

    The cheapest flight price from Seattle to Helsinki is $384. On average you can expect to pay $803. The most popular route, (Seattle/Tacoma Intl - Helsinki-Vantaa), can usually be booked for $441.

  • 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 $1,084). 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
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.
Portland to Helsinki flights
Portland to Kemi flights
Portland to Oulu flights
Portland to Turku flights

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 June 18, 2025.
AirlineCheapestAverageFlexibilityOn-time
Scandinavian AirlinesCheapest$394Average$593FlexibilityNo cancel feeOn-time77%
IcelandairCheapest$429Average$820FlexibilityNo cancel feeOn-time76%
LufthansaCheapest$549Average$901FlexibilityNo cancel feeOn-time76%
FinnairCheapest$559Average$991FlexibilityNo cancel feeOn-time76%
British AirwaysCheapest$569Average$1,205FlexibilityNo cancel feeOn-time70%
United AirlinesCheapest$583Average$966FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$601Average$1,093FlexibilityNo cancel feeOn-time71%

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