Question 1

What is the cheapest Seattle/Tacoma Intl to Helsinki-Vantaa flight route?

Accepted Answer

Fly from Seattle/Tacoma Intl to Helsinki-Vantaa for the best Seattle/Tacoma Intl - Helsinki-Vantaa flight prices

Question 2

How many flights depart from Seattle to Helsinki on average per week?

Accepted Answer

The number of flights available between Seattle and Helsinki is 25 per week as of August 2025. The most frequent departure day is Mon, with 20% of weekly flights leaving on this day.

Question 3

How many flights depart from Seattle to Helsinki on average per day?

Accepted Answer

The number of flights available between Seattle and Helsinki is 3 per day as of August 2025. The most frequent departure time is 5:00PM, with 100% of daily flights leaving in the afternoon.

Question 4

What is the cheapest day to depart on your flight to Helsinki?

Accepted Answer

The cheapest day to depart on your flight to Helsinki is on a Sunday when prices can be found for as low as $914. This is often the case because there is less demand to fly during this day of the week. Flights from Seattle to Helsinki on a Friday will generally be more expensive and average around $1,086. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

Question 5

Which layover airport offers the lowest fares from Seattle to Helsinki?

Accepted Answer

Flights via Copenhagen (CPH) offer the lowest average round-trip price of $637.

Question 6

What airlines fly to Helsinki?

Accepted Answer

Icelandair, Finnair and Scandinavian Airlines are the top three most popular airlines that fly to Helsinki from Seattle according to our data. Icelandair is the first choice among our users, with 40% of people opting to fly with this airline when traveling to Helsinki. Keep in mind that there are 7 different airlines that fly to Helsinki on a routine basis, so you have a few additional options to choose from.

Question 7

How have Seattle to Helsinki flight prices changed over time?

Accepted Answer

As of August 2025, prices for Seattle to Helsinki flights are approximately 24% more expensive when compared to flights at the same time last year.

Question 8

Which airport is the most popular layover for flights between Seattle and Helsinki?

Accepted Answer

Reykjavik (KEF) was the most common stop: 55% of momondo users choosing 1-stop flights on this route connected there.

Question 9

Which layover airport has the shortest travel time from Seattle to Helsinki?

Accepted Answer

Flights connecting via Reykjavik (KEF) have the shortest average one-way travel time: 12h 24m.

Question 10

What is the cheapest airline that flies from Seattle/Tacoma Intl to Helsinki-Vantaa?

Accepted Answer

Icelandair is the most popular carrier operating from Seattle/Tacoma Intl to Helsinki-Vantaa

Question 11

What cabin class options are available on Seattle/Tacoma Intl to Helsinki-Vantaa flights?

Accepted Answer

There are 3 cabin classes available to choose from on Seattle/Tacoma Intl to Helsinki-Vantaa flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Question 12

What is the cheapest month to fly to Helsinki?

Accepted Answer

The month of January is, on average, the cheapest month to fly to Helsinki from Seattle, with most prices found around $528. If you aren’t able to travel during the month of January, then book flights to Helsinki from Seattle during October instead. Flights to Helsinki in October, while not as cheap as those in January, still average around $558.

Question 13

Which layover airport has the shortest connection time from Seattle to Helsinki?

Accepted Answer

Reykjavik (KEF) has the shortest average layover time for this route: 1h 13m.

Question 14

What is the cheapest time of day to depart on your flight to Helsinki?

Accepted Answer

According to our data, the cheapest time of day to fly to Helsinki is in the morning. momondo users have found flights departing from Seattle to Helsinki in the morning for as low as $788. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. In the afternoon is when there is more demand to fly to Helsinki, so prices are often more expensive at around $984 per ticket.

Question 15

What is the typical price of a round-trip flight between Seattle and Helsinki?

Accepted Answer

Prices are currently low for flights on this route.Typical prices usually range from $658 to $1,095.
The lowest price recently found on this route was $322.

Question 16

Can stopping save me money on Seattle to Helsinki flights?

Accepted Answer

No. A direct flight is the cheapest option for a flight between Seattle to Helsinki.

Question 17

How far in advance should I book a flight to Helsinki?

Accepted Answer

You are more likely to see cheaper flights to Helsinki from Seattle when booking weeks ahead of your departure date. In general, you can expect to find flights to Helsinki for around $832 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Helsinki from Seattle for as low as $620 on momondo.

Question 18

When did momondo last update prices for flights from Seattle/Tacoma Intl Airport to Helsinki-Vantaa Airport?

Accepted Answer

Prices for flights from Seattle/Tacoma Intl Airport to Helsinki-Vantaa Airport are refreshed on a daily basis.

Question 19

How many operators does momondo search for flights from Seattle/Tacoma Intl Airport to Helsinki-Vantaa Airport?

Accepted Answer

As of August 2025, there are 7 operators available to choose from for flights from Seattle/Tacoma Intl Airport to Helsinki-Vantaa Airport.

Question 20

How old do you have to be to fly from Seattle/Tacoma Intl Airport to Helsinki-Vantaa Airport?

Accepted Answer

The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Seattle/Tacoma Intl Airport to Helsinki-Vantaa Airport.

Question 21

What documentation or ID do you need to fly to Helsinki-Vantaa Airport?

Accepted Answer

The necessary travel and health documents for your Helsinki-Vantaa Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

Best Price Found	$370
Fastest flight time	12h 20m
Direct flights	None
Airports in Helsinki	1 airport

Airline	Rating	Free Cancellation	Price
Scandinavian Airlines	PriceFrom $322	Free Cancellation	Rating 7.4 1,468 reviews	Search Scandinavian Airlines flights
Icelandair	PriceFrom $426	Free Cancellation	Rating 7.0 526 reviews	Search Icelandair flights
Finnair	PriceFrom $558	Free Cancellation	Rating 7.6 1,321 reviews	Search Finnair flights
British Airways	PriceFrom $569	Free Cancellation	Rating 6.6 7,266 reviews	Search British Airways flights
Lufthansa	PriceFrom $582	Free Cancellation	Rating 6.8 7,317 reviews	Search Lufthansa flights
United Airlines	PriceFrom $583	Free Cancellation	Rating 7.4 8,916 reviews	Search United Airlines flights
American Airlines	PriceFrom $601	Free Cancellation	Rating 7.2 10,000 reviews	Search American Airlines flights

Cheap flights from Seattle to Helsinki from $322

This is the cheapest round-trip flight price found by a momondo user in the last 72 hours by searching for a flight from Seattle to Helsinki departing on 10/5. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

Big names and deals

Big names and deals

Filter for what you want

Filter for what you want

Trusted and free

Trusted and free

Price Alerts

Price Alerts

Find the cheapest flights from Seattle to Helsinki (SEA-HEL)

Cheap round-trip flights

Cheap one-way flights

Cheap last minute flights

Scandinavian Airlines flights from Seattle to Helsinki

Our best Scandinavian Airlines deals on Seattle to Helsinki flight tickets

Icelandair flights from Seattle to Helsinki

Our best Icelandair deals on Seattle to Helsinki flight tickets

momondo Fare Finder

Use the filters below to find and compare flights from Seattle to Helsinki that are best for you.

See travel insights to Helsinki from

How to get the cheapest flight ticket from Seattle to Helsinki

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the typical price of a round-trip flight between Seattle and Helsinki?

What is the cheapest month to fly to Helsinki?

What is the cheapest day to depart on your flight to Helsinki?

What is the cheapest time of day to depart on your flight to Helsinki?

What is the cheapest Seattle/Tacoma Intl to Helsinki-Vantaa flight route?

Fly from Seattle/Tacoma Intl to Helsinki-Vantaa for the best Seattle/Tacoma Intl - Helsinki-Vantaa flight prices

How far in advance should I book a flight to Helsinki?

What cabin class options are available on Seattle/Tacoma Intl to Helsinki-Vantaa flights?

There are 3 cabin classes available to choose from on Seattle/Tacoma Intl to Helsinki-Vantaa flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on Seattle to Helsinki flights?

No. A direct flight is the cheapest option for a flight between Seattle to Helsinki.

How have Seattle to Helsinki flight prices changed over time?

As of August 2025, prices for Seattle to Helsinki flights are approximately 24% more expensive when compared to flights at the same time last year.

What is the cheapest airline that flies from Seattle/Tacoma Intl to Helsinki-Vantaa?

Icelandair is the most popular carrier operating from Seattle/Tacoma Intl to Helsinki-Vantaa

What airlines fly to Helsinki?

Which airport is the most popular layover for flights between Seattle and Helsinki?

Reykjavik (KEF) was the most common stop: 55% of momondo users choosing 1-stop flights on this route connected there.

Which layover airport offers the lowest fares from Seattle to Helsinki?

Flights via Copenhagen (CPH) offer the lowest average round-trip price of $637.

Which layover airport has the shortest travel time from Seattle to Helsinki?

Flights connecting via Reykjavik (KEF) have the shortest average one-way travel time: 12h 24m.

Which layover airport has the shortest connection time from Seattle to Helsinki?

Reykjavik (KEF) has the shortest average layover time for this route: 1h 13m.

How many flights depart from Seattle to Helsinki on average per day?

The number of flights available between Seattle and Helsinki is 3 per day as of August 2025. The most frequent departure time is 5:00PM, with 100% of daily flights leaving in the afternoon.

How many flights depart from Seattle to Helsinki on average per week?

The number of flights available between Seattle and Helsinki is 25 per week as of August 2025. The most frequent departure day is Mon, with 20% of weekly flights leaving on this day.

When to book flights from Seattle to Helsinki

Cheap Seattle to Helsinki (SEA to HEL) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Seattle to Helsinki

Best Price Found

Fastest flight time

Direct flights

Airports in Helsinki

How far is Seattle/Tacoma Intl to Helsinki-Vantaa by plane?

When did momondo last update prices for flights from Seattle/Tacoma Intl Airport to Helsinki-Vantaa Airport?

How many operators does momondo search for flights from Seattle/Tacoma Intl Airport to Helsinki-Vantaa Airport?

How old do you have to be to fly from Seattle/Tacoma Intl Airport to Helsinki-Vantaa Airport?

What documentation or ID do you need to fly to Helsinki-Vantaa Airport?

What is the most popular plane model from Seattle to Helsinki?

What is the most popular airline from Seattle to Helsinki?

Best airlines flying from Seattle to Helsinki

Compare and see reviews for airlines that fly from Seattle to Helsinki with momondo

Finnair Flights From Seattle to Helsinki

American Airlines Flights From Seattle to Helsinki

Traveling to a place near Helsinki?

Why use momondo?

Why should I use momondo to find a flight deal from Seattle to Helsinki?

Can I find flights from Seattle to Helsinki with flexible booking policies on momondo?

How can momondo help me find flights from Seattle to Helsinki?

I’m not ready to book a flight from Seattle to Helsinki right now. Can momondo alert me if prices change?

An easier way to manage your Helsinki trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to Finland