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$238+ 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 10/6. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — HEL
Jul 7 — Jul 141
Mon 7/7
Mon 7/14
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 Monday or Sunday 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 July 2, 2025.

Round-trip from

$311
(oojo)

One-way from

$238
(Kiwi.com)

Popular in

July

Cheapest in

January

Average price

$1,149

Good round-trip deal

$616 or less

Good one-way deal

$459 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 ($202 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($26 potential savings vs. average RT price).
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Average for round-trip flights in July 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 July 2, 2025.

This oojo deal was found by Cheapflights users on 6/30. 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.
Wed 8/204:00 pmSEA - HEL
1 stop32h 35mScandinavian Airlines
Mon 8/259:05 pmHEL - SEA
2 stops50h 45mScandinavian Airlines
Deal found 6/30$311
This oojo deal was found by Cheapflights users on 6/30. 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 20mIcelandair
Fri 11/211:55 pmHEL - SEA
1 stop13h 05mIcelandair
Deal found 6/30$476
This Trip.com deal was found by Cheapflights users on 7/1. 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.
Sun 9/73:45 pmSEA - HEL
2 stops19h 35mMultiple Airlines
Fri 9/127:05 amHEL - SEA
2 stops20h 45mMultiple Airlines
Deal found 7/1$519

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 July 2, 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 8/20

4:00 pm-10:35 am

1 stop32h 35m

Helsinki-Vantaa

Mon 8/25

9:05 pm-1:50 pm

2 stops50h 45m

$311

SeattleHelsinki

SEA - HEL

SEAHEL

Seattle/Tacoma Intl

Fri 11/14

2:35 pm-12:55 pm

1 stop12h 20m

Helsinki-Vantaa

Fri 11/21

1:55 pm-5:00 pm

1 stop13h 05m

$476

SeattleHelsinki

SEA - HEL

SEAHEL

Seattle/Tacoma Intl

Sun 9/7

3:45 pm-9:20 pm

2 stops19h 35m

Helsinki-Vantaa

Fri 9/12

7:05 am-5:50 pm

2 stops20h 45m

$519

SeattleHelsinki

SEA - HEL

SEAHEL

Seattle/Tacoma Intl

Mon 10/6

7:00 pm-9:20 pm

2 stops16h 20m

$238

SeattleHelsinki

SEA - HEL

SEAHEL

Seattle/Tacoma Intl

Sun 8/17

5:40 pm-1:10 pm

Nonstop9h 30m

$250

SeattleHelsinki

SEA - HEL

SEAHEL

Seattle/Tacoma Intl

Tue 9/30

7:10 pm-11:40 am

1 stop30h 30m

$480

SeattleHelsinki

SEA - HEL

SEAHEL

Seattle/Tacoma Intl

Fri 8/15

3:45 pm-2:00 pm

1 stop12h 15m

$504

SeattleHelsinki

SEA - HEL

SEAHEL

Seattle/Tacoma Intl

Sat 8/16

12:20 am-11:55 am

2 stops25h 35m

$540

SeattleHelsinki

SEA - HEL

SEAHEL

Seattle/Tacoma Intl

Thu 8/7

12:46 am-2:15 pm

1 stop27h 29m

$743

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/29

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 27, 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 July 2, 2025.

It’s optimal to fly from Seattle to Helsinki in the morning. By choosing this option you can save up to 22% on the cost of your flight, compared to a flight in the afternoon.

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 July 2, 2025.
Get a feel of what it's like to fly with Finnair, United Airlines, and Turkish Airlines from Seattle to Helsinki by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Finnair
7.6
Good
1,303 reviews

Food

6.7

Boarding

7.6

Comfort

7.4

Crew

8.1

Overall

7.6

Entertainment

6.8

Reviews

1 / 20
6.0
Good

Rowland,Dec 2024

FRA - HEL

Finnair need to get a better system for boarding. Hundreds of passengers all attempting to get their boarding cards and passports checked at the gate and then get onto the aircraft is ridiculous, time consuming and frankly unfair to passengers.
Finnair
7.6
Good
1,303 reviews
Finnair
7.6
Good
1,303 reviews

Food

6.7

Boarding

7.6

Comfort

7.4

Crew

8.1

Overall

7.6

Entertainment

6.8

Reviews

1 / 20
6.0
Good

Rowland,Dec 2024

FRA - HEL

Finnair need to get a better system for boarding. Hundreds of passengers all attempting to get their boarding cards and passports checked at the gate and then get onto the aircraft is ridiculous, time consuming and frankly unfair to passengers.
United Airlines
7.4
Good
8,861 reviews
Finnair
7.6
Good
1,303 reviews

Food

6.7

Boarding

7.6

Comfort

7.4

Crew

8.1

Overall

7.6

Entertainment

6.8

Reviews

1 / 20
6.0
Good

Rowland,Dec 2024

FRA - HEL

Finnair need to get a better system for boarding. Hundreds of passengers all attempting to get their boarding cards and passports checked at the gate and then get onto the aircraft is ridiculous, time consuming and frankly unfair to passengers.
Turkish Airlines
7.3
Good
3,891 reviews
Finnair
7.6
Good
1,303 reviews

Food

6.7

Boarding

7.6

Comfort

7.4

Crew

8.1

Overall

7.6

Entertainment

6.8

Reviews

1 / 20
6.0
Good

Rowland,Dec 2024

FRA - HEL

Finnair need to get a better system for boarding. Hundreds of passengers all attempting to get their boarding cards and passports checked at the gate and then get onto the aircraft is ridiculous, time consuming and frankly unfair to passengers.
Scandinavian Airlines
7.3
Good
1,414 reviews
Finnair
7.6
Good
1,303 reviews

Food

6.7

Boarding

7.6

Comfort

7.4

Crew

8.1

Overall

7.6

Entertainment

6.8

Reviews

1 / 20
6.0
Good

Rowland,Dec 2024

FRA - HEL

Finnair need to get a better system for boarding. Hundreds of passengers all attempting to get their boarding cards and passports checked at the gate and then get onto the aircraft is ridiculous, time consuming and frankly unfair to passengers.
American Airlines
7.2
Good
10,000 reviews
Finnair
7.6
Good
1,303 reviews

Food

6.7

Boarding

7.6

Comfort

7.4

Crew

8.1

Overall

7.6

Entertainment

6.8

Reviews

1 / 20
6.0
Good

Rowland,Dec 2024

FRA - HEL

Finnair need to get a better system for boarding. Hundreds of passengers all attempting to get their boarding cards and passports checked at the gate and then get onto the aircraft is ridiculous, time consuming and frankly unfair to passengers.

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 3 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 $311. Another airline that can offer you cheap pricing is Icelandair. Users have found that Scandinavian Airlines is 63% 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 Finnair ($250), Turkish Airlines ($480), and Icelandair ($504).

  • 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 $240. On average you can expect to pay $1,755. The most popular route, (Seattle/Tacoma Intl - Helsinki-Vantaa), can usually be booked for $311.

  • 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.
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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 July 2, 2025.
AirlineCheapestAverageFlexibilityOn-time
Scandinavian AirlinesCheapest$394Average$593FlexibilityNo cancel feeOn-time77%
IcelandairCheapest$428Average$832FlexibilityNo cancel feeOn-time76%
LufthansaCheapest$549Average$901FlexibilityNo cancel feeOn-time76%
FinnairCheapest$559Average$998FlexibilityNo cancel feeOn-time76%
British AirwaysCheapest$569Average$1,093FlexibilityNo cancel feeOn-time70%
United AirlinesCheapest$583Average$966FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$601Average$1,093FlexibilityNo cancel feeOn-time71%

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