$661 Cheap Flights from Helsinki (HEL) to Seattle (SEA)

View $661 flight on Sat, Mar 14, 2026Opens in a new window

Popular airlines from Helsinki-Vantaa Airport (HEL) to Seattle

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Cheap Flights from Helsinki to Seattle (HEL-SEA)

Prices were available within the past 7 days and start at $661 for one-way flights and $787 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Finnair
Wed, Jan 28 - Fri, Feb 6
HEL
Helsinki
SEA
Seattle
$787 Roundtrip, found 16 hours ago
$787
Roundtrip
found 16 hours ago
Select Finnair flight, departing Wed, Jan 28 from Helsinki to Seattle, returning Fri, Feb 6, priced at $787 found 16 hours ago
Finnair
Wed, Jan 28 - Wed, Feb 4
HEL
Helsinki
SEA
Seattle
$791 Roundtrip, found 6 days ago
$791
Roundtrip
found 6 days ago
Select Finnair flight, departing Wed, Jan 28 from Helsinki to Seattle, returning Wed, Feb 4, priced at $791 found 6 days ago
Icelandair
Wed, Jan 28 - Fri, Feb 6
HEL
Helsinki
SEA
Seattle
$792 Roundtrip, found 16 hours ago
$792
Roundtrip
found 16 hours ago
Select Icelandair flight, departing Wed, Jan 28 from Helsinki to Seattle, returning Fri, Feb 6, priced at $792 found 16 hours ago
Icelandair
Wed, Jan 28 - Wed, Feb 4
HEL
Helsinki
SEA
Seattle
$796 Roundtrip, found 6 days ago
$796
Roundtrip
found 6 days ago
Select Icelandair flight, departing Wed, Jan 28 from Helsinki to Seattle, returning Wed, Feb 4, priced at $796 found 6 days ago
Finnair
Sat, Jan 31 - Wed, Feb 4
HEL
Helsinki
SEA
Seattle
$810 Roundtrip, found 6 days ago
$810
Roundtrip
found 6 days ago
Select Finnair flight, departing Sat, Jan 31 from Helsinki to Seattle, returning Wed, Feb 4, priced at $810 found 6 days ago
Finnair
Sat, Jan 31 - Wed, Feb 4
HEL
Helsinki
SEA
Seattle
$813 Roundtrip, found 6 days ago
$813
Roundtrip
found 6 days ago
Select Finnair flight, departing Sat, Jan 31 from Helsinki to Seattle, returning Wed, Feb 4, priced at $813 found 6 days ago
Finnair
Wed, Jan 28 - Wed, Feb 4
HEL
Helsinki
SEA
Seattle
$817 Roundtrip, found 6 days ago
$817
Roundtrip
found 6 days ago
Select Finnair flight, departing Wed, Jan 28 from Helsinki to Seattle, returning Wed, Feb 4, priced at $817 found 6 days ago
Turkish Airlines
Thu, Mar 5 - Wed, Mar 11
HEL
Helsinki
SEA
Seattle
$818 Roundtrip, found 16 hours ago
$818
Roundtrip
found 16 hours ago
Select Turkish Airlines flight, departing Thu, Mar 5 from Helsinki to Seattle, returning Wed, Mar 11, priced at $818 found 16 hours ago
British Airways
Mon, Sep 14 - Mon, Sep 21
HEL
Helsinki
SEA
Seattle
$897 Roundtrip, found 3 days ago
$897
Roundtrip
found 3 days ago
Select British Airways flight, departing Mon, Sep 14 from Helsinki to Seattle, returning Mon, Sep 21, priced at $897 found 3 days ago
Delta
Thu, Jan 15 - Thu, Jan 22
HEL
Helsinki
SEA
Seattle
$918 Roundtrip, found 1 day ago
$918
Roundtrip
found 1 day ago
Select Delta flight, departing Thu, Jan 15 from Helsinki to Seattle, returning Thu, Jan 22, priced at $918 found 1 day ago

Find the cheapest month to fly from Helsinki (HEL) to Seattle (SEA)

May is typically the cheapest month to fly

From $523 - $1,011 per traveler.
Flights from Helsinki (HEL) to Seattle (SEA)
Origin airport
Vantaa
Destination airport
Seattle - Tacoma Intl.
Airlines serving
Air Baltic, Air Canada, Air France, American Airlines, British Airways, Delta, Finnair, Iberia, Icelandair, KLM, Lufthansa, Scandinavian Airlines, Turkish Airlines, United
Roundtrip price
$787
Distance
4767 mi

Helsinki to Seattle Flights

The cheapest times to fly from Helsinki to Seattle

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Helsinki to Seattle are during the month of January. You can find some of the cheapest flights from Helsinki to Seattle with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Helsinki to Seattle

Sunday is one of the best days to book for cheap flights from Helsinki to Seattle: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Helsinki to Seattle

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Helsinki to Seattle in 2026. You can also book with separate airlines for your outbound and return journeys, from $661 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Helsinki to Seattle flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Helsinki to Seattle airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Frequently asked questions

How much does a flight from Vantaa Airport (HEL) to Seattle - Tacoma Intl. Airport (SEA) cost?
Secure a cheap one-way flight from $661 or cheap return flight from $787 from Vantaa Airport (HEL) to Seattle - Tacoma Intl. Airport (SEA) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight deals on this route.
What is the cheapest month to fly from Vantaa Airport (HEL) to Seattle - Tacoma Intl. Airport (SEA)?
January is the cheapest month to fly from HEL to SEA. Avoiding peak travel times is often the key to landing a great deal.
What is the cheapest airline that flies from Vantaa Airport (HEL) to Seattle - Tacoma Intl. Airport (SEA)?
To find the cheapest airline that'll fly you from HEL to SEA, use Expedia's filter tool. Customize your search based on what's important to you, such as preferred carriers and seat class. You can then sort your results by "Price (lowest to highest)" to see the cheapest flights first.
How many flights per day from Vantaa Airport (HEL) to Seattle - Tacoma Intl. Airport (SEA)?
Direct flights from Vantaa Airport (HEL) to Seattle - Tacoma Intl. Airport (SEA) aren't available daily, so you'll need to take a flight with a layover. Explore your options with Expedia's filter tool. Enter your dates and select either "1 Stop" or "2+ Stops."
What day of the week has the most flights from HEL to SEA?
You'll typically find Tuesday the quietest day for flights, while Fridays are often the busiest.* However this can vary from season to season and during public holidays or peak travel times.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Vantaa Airport (HEL) to Seattle - Tacoma Intl. Airport (SEA)?
To avoid potential delays on the Vantaa Airport (HEL) to Seattle - Tacoma Intl. Airport (SEA) route, aim to fly before 3 PM. Departures after this hour have a 22% higher chance of cancellation.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from Vantaa Airport (HEL) to Seattle - Tacoma Intl. Airport (SEA) last-minute?
Booking your plane ticket from HEL to SEA right before your trip is generally more expensive. But if you're flexible with your departure times and dates, you could score a cheap last-minute fare.
Is it cheaper to book a HEL to SEA flight and hotel package?
You'll typically save money by booking a HEL to SEA flight and hotel package compared to booking separately. In fact, you could save hundreds of dollars by bundling with Expedia. And it's easy to manage everything in one convenient place. Once you've chosen your ideal flights and accommodations, consider adding extras including tours, car rentals and activities.
Can I cancel or change the date of my flight from Vantaa Airport (HEL) to Seattle - Tacoma Intl. Airport (SEA)?
Usually, it's possible to reschedule or cancel your HEL to SEA flight. However, if the booking was made more than 24 hours ago, additional charges may apply. Check your airline's policies in your itinerary to see what changes are allowed and whether any costs are involved. You'll also find further details on our Customer Service portal.

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*Available to One Key members.