$508 Cheap Flights from Seattle (SEA) to Helsinki (HEL)

View $508 flight on Sun, Aug 16, 2026Opens in a new window

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

Cheap Flights from Seattle to Helsinki (SEA-HEL)

Prices were available within the past 7 days and start at $508 for one-way flights and $345 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Scandinavian Airlines
Sun, Aug 16 - Mon, Aug 24
SEA
Seattle
HEL
Helsinki
$345 Roundtrip, found 6 days ago
$345
Roundtrip
found 6 days ago
Select Scandinavian Airlines flight, departing Sun, Aug 16 from Seattle to Helsinki, returning Mon, Aug 24, priced at $345 found 6 days ago
Scandinavian Airlines
Sun, Aug 23 - Mon, Aug 31
SEA
Seattle
HEL
Helsinki
$345 Roundtrip, found 1 day ago
$345
Roundtrip
found 1 day ago
Select Scandinavian Airlines flight, departing Sun, Aug 23 from Seattle to Helsinki, returning Mon, Aug 31, priced at $345 found 1 day ago
Scandinavian Airlines
Sat, Sep 5 - Mon, Sep 14
SEA
Seattle
HEL
Helsinki
$395 Roundtrip, found 1 hour ago
$395
Roundtrip
found 1 hour ago
Select Scandinavian Airlines flight, departing Sat, Sep 5 from Seattle to Helsinki, returning Mon, Sep 14, priced at $395 found 1 hour ago
Scandinavian Airlines
Tue, Sep 1 - Tue, Sep 8
SEA
Seattle
HEL
Helsinki
$445 Roundtrip, found 6 days ago
$445
Roundtrip
found 6 days ago
Select Scandinavian Airlines flight, departing Tue, Sep 1 from Seattle to Helsinki, returning Tue, Sep 8, priced at $445 found 6 days ago
Scandinavian Airlines
Sun, Aug 23 - Mon, Aug 31
SEA
Seattle
HEL
Helsinki
$445 Roundtrip, found 1 day ago
$445
Roundtrip
found 1 day ago
Select Scandinavian Airlines flight, departing Sun, Aug 23 from Seattle to Helsinki, returning Mon, Aug 31, priced at $445 found 1 day ago
Icelandair
Sun, Nov 9 - Wed, Nov 26
SEA
Seattle
HEL
Helsinki
$681 Roundtrip, found 22 hours ago
$681
Roundtrip
found 22 hours ago
Select Icelandair flight, departing Sun, Nov 9 from Seattle to Helsinki, returning Wed, Nov 26, priced at $681 found 22 hours ago
United
Wed, Oct 29 - Thu, Nov 6
SEA
Seattle
HEL
Helsinki
$798 Roundtrip, found 1 day ago
$798
Roundtrip
found 1 day ago
Select United flight, departing Wed, Oct 29 from Seattle to Helsinki, returning Thu, Nov 6, priced at $798 found 1 day ago
Air Canada
Tue, May 5 - Tue, May 12
SEA
Seattle
HEL
Helsinki
$800 Roundtrip, found 1 day ago
$800
Roundtrip
found 1 day ago
Select Air Canada flight, departing Tue, May 5 from Seattle to Helsinki, returning Tue, May 12, priced at $800 found 1 day ago
Delta
Tue, Oct 28 - Thu, Nov 6
SEA
Seattle
HEL
Helsinki
$800 Roundtrip, found 1 day ago
$800
Roundtrip
found 1 day ago
Select Delta flight, departing Tue, Oct 28 from Seattle to Helsinki, returning Thu, Nov 6, priced at $800 found 1 day ago
Lufthansa
Sun, Mar 8 - Fri, Apr 3
SEA
Seattle
HEL
Helsinki
$800 Roundtrip, found 10 hours ago
$800
Roundtrip
found 10 hours ago
Select Lufthansa flight, departing Sun, Mar 8 from Seattle to Helsinki, returning Fri, Apr 3, priced at $800 found 10 hours ago

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

October is typically the cheapest month to fly

From $391 - $1,080 per traveler.

Alternative airports near Helsinki

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Vantaa HEL. Cheapest option available. Average driving time to city center is 22 minutes. Flights from $944
HEL
Vantaa
Cheapest
Average driving time to city center22 min
Flights from $944

Frequently asked questions

How much does a flight from Seattle - Tacoma Intl. Airport (SEA) to Vantaa Airport (HEL) cost?
Snag a cheap one-way flight from $508 or cheap return flight from $345 from Seattle - Tacoma Intl. Airport (SEA) to Vantaa Airport (HEL) 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 Seattle - Tacoma Intl. Airport (SEA) to Vantaa Airport (HEL)?
August is the cheapest month to fly from SEA to HEL. Timing your trip outside of the busy season is often the key to finding better fares.
What is the cheapest airline that flies from Seattle - Tacoma Intl. Airport (SEA) to Vantaa Airport (HEL)?
Use the filters on Expedia to compare airlines and find the cheapest carrier that'll take you from SEA to HEL. Then, sort your results by "Price (lowest to highest)" to pick up a great deal.
How many flights per day from Seattle - Tacoma Intl. Airport (SEA) to Vantaa Airport (HEL)?
Nonstop flights from Seattle - Tacoma Intl. Airport (SEA) to Vantaa Airport (HEL) 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 choose either "1 Stop" or "2+ Stops."
What day of the week has the most flights from SEA to HEL?
Generally you'll find the greatest selection of flight options on a Friday. Tuesdays are often the quietest.* However, this can vary depending on the season, airline and other factors.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Seattle - Tacoma Intl. Airport (SEA) to Vantaa Airport (HEL)?
To reach Vantaa Airport (HEL) on time, book a flight that takes off from Seattle - Tacoma Intl. Airport (SEA) before 3 PM. The chance of cancellations is 22% higher, on average, for departures after this hour.**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 Seattle - Tacoma Intl. Airport (SEA) to Vantaa Airport (HEL) last-minute?
Booking your ticket from SEA to HEL right before your trip is usually more expensive. However, if you're flexible with your travel times and dates, you could snag a cheap last-minute fare.
Is it cheaper to book a SEA to HEL flight and hotel package?
Securing a SEA to HEL flight and hotel package is generally cheaper than booking separately. With Expedia, you can enjoy the convenience of organizing your travels in one place. Pick from our wide range of hotels and then add car rentals, flights and activities to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Seattle - Tacoma Intl. Airport (SEA) to Vantaa Airport (HEL)?
If you reserved your SEA to HEL flight within the last 24 hours, you may be able to cancel or modify it without any fees. Depending on the airline and the ticket type you purchased, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal for further details.

Travel information

Origin airport
Seattle - Tacoma Intl.
Destination airport
Vantaa
Airlines serving
Air Baltic, Air Canada, Air France, Alaska Airlines, American Airlines, British Airways, Delta, Finnair, Iberia, Icelandair, KLM, Lufthansa, Scandinavian Airlines, Turkish Airlines, United
Roundtrip price
$344
Distance
4767 mi

Book with confidence

Seattle to Helsinki Flights

The cheapest times to fly from Seattle to Helsinki

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 Seattle to Helsinki are during the month of August. You can find some of the cheapest flights from Seattle to Helsinki with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Seattle to Helsinki

Sunday is one of the best days to book for cheap flights from Seattle to Helsinki: 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 Seattle to Helsinki

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 Seattle to Helsinki in 2025. You can also book with separate airlines for your outbound and return journeys, from $508 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 Seattle to Helsinki 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 Seattle to Helsinki 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.

 

Seattle to Helsinki Flights

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*Available to One Key members.