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434 € Cheap Flights from Seattle / Tacoma International to Helsinki Vantaa

Compare Seattle / Tacoma International to Helsinki Vantaa flight deals

Find the cheapest month or even day of the year to fly to Helsinki Vantaa

Book the best Helsinki Vantaa fare with no extra fees

Flight deals from Seattle / Tacoma International to Helsinki Vantaa

Looking for a cheap last-minute deal or the best return flight from Seattle / Tacoma International to Helsinki Vantaa? Find the lowest prices on one-way and return tickets right here.
Helsinki.434 € per passenger.Departing Wed, 10 Sep, returning Tue, 23 Sep.Return flight with Scandinavian Airlines.Outbound indirect flight with Scandinavian Airlines, departs from Seattle / Tacoma International on Wed, 10 Sep, arriving in Helsinki Vantaa.Inbound indirect flight with Scandinavian Airlines, departs from Helsinki Vantaa on Tue, 23 Sep, arriving in Seattle / Tacoma International.Price includes taxes and charges.From 434 €, select.
Helsinki.462 € per passenger.Departing Sat, 8 Nov, returning Sun, 16 Nov.Return flight with Icelandair and Norwegian Air Sweden.Outbound indirect flight with Icelandair, departs from Seattle / Tacoma International on Sat, 8 Nov, arriving in Helsinki Vantaa.Inbound indirect flight with Norwegian Air Sweden, departs from Helsinki Vantaa on Sun, 16 Nov, arriving in Seattle / Tacoma International.Price includes taxes and charges.From 462 €, select.
Helsinki.498 € per passenger.Departing Wed, 1 Oct, returning Sun, 12 Oct.Return flight with Scandinavian Airlines.Outbound indirect flight with Scandinavian Airlines, departs from Seattle / Tacoma International on Wed, 1 Oct, arriving in Helsinki Vantaa.Inbound indirect flight with Scandinavian Airlines, departs from Helsinki Vantaa on Sun, 12 Oct, arriving in Seattle / Tacoma International.Price includes taxes and charges.From 498 €, select.
Helsinki.507 € per passenger.Departing Wed, 20 Aug, returning Tue, 26 Aug.Return flight with Icelandair and Norwegian Air Sweden.Outbound indirect flight with Icelandair, departs from Seattle / Tacoma International on Wed, 20 Aug, arriving in Helsinki Vantaa.Inbound indirect flight with Norwegian Air Sweden, departs from Helsinki Vantaa on Tue, 26 Aug, arriving in Seattle / Tacoma International.Price includes taxes and charges.From 507 €, select.
Helsinki.522 € per passenger.Departing Wed, 10 Sep, returning Wed, 19 Nov.Return flight with Scandinavian Airlines.Outbound indirect flight with Scandinavian Airlines, departs from Seattle / Tacoma International on Wed, 10 Sep, arriving in Helsinki Vantaa.Inbound indirect flight with Scandinavian Airlines, departs from Helsinki Vantaa on Wed, 19 Nov, arriving in Seattle / Tacoma International.Price includes taxes and charges.From 522 €, select.
Helsinki.548 € per passenger.Departing Wed, 1 Apr, returning Thu, 30 Apr.Return flight with Turkish Airlines.Outbound indirect flight with Turkish Airlines, departs from Seattle / Tacoma International on Wed, 1 Apr, arriving in Helsinki Vantaa.Inbound indirect flight with Turkish Airlines, departs from Helsinki Vantaa on Thu, 30 Apr, arriving in Seattle / Tacoma International.Price includes taxes and charges.From 548 €, select.
Helsinki.596 € per passenger.Departing Wed, 10 Sep, returning Mon, 1 Dec.Return flight with Icelandair.Outbound indirect flight with Icelandair, departs from Seattle / Tacoma International on Wed, 10 Sep, arriving in Helsinki Vantaa.Inbound indirect flight with Icelandair, departs from Helsinki Vantaa on Mon, 1 Dec, arriving in Seattle / Tacoma International.Price includes taxes and charges.From 596 €, select.
Helsinki.597 € per passenger.Departing Wed, 3 Dec, returning Wed, 10 Dec.Return flight with Finnair.Outbound indirect flight with Finnair, departs from Seattle / Tacoma International on Wed, 3 Dec, arriving in Helsinki Vantaa.Inbound indirect flight with Finnair, departs from Helsinki Vantaa on Wed, 10 Dec, arriving in Seattle / Tacoma International.Price includes taxes and charges.From 597 €, select.

Find the cheapest month to fly from Seattle / Tacoma International to Helsinki Vantaa

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Seattle / Tacoma International to Helsinki Vantaa flights are currently cheapest in September.
Jul
from 1.317 €
Aug
from 507 €
Sep
from 434 €
Oct
from 498 €
Nov
from 462 €
Dec
from 597 €
Jan
from 597 €
Feb
from 4.105 €
Mar
from 4.472 €
Apr
from 548 €
May
Find prices
Jun
from 869 €

Direct flights from Seattle / Tacoma International to Helsinki Vantaa

Seattle / Tacoma International to Helsinki Vantaa: Alternative routes

Compare routes from Seattle / Tacoma International to Helsinki below. You may find an airport to fly into that's cheaper, faster, or easier than Helsinki Vantaa.

Seattle to Helsinki: Flight information

The things to know before you go.
Cheapest flight found434 €
Cheapest month to flySeptember
Average flight time9 hrs, 30 mins
Most popular airlineAlaska Airlines
Average flights per week27

Finding cheap flights from Seattle / Tacoma International to Helsinki Vantaa: Frequently asked questions

The best price we found for a return flight from Seattle / Tacoma International to Helsinki Vantaa is 434 €. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.
9 hours and 30 minutes is the average flight time from Seattle / Tacoma International to Helsinki Vantaa.
Alaska Airlines, American Airlines and Finnair fly direct from Seattle / Tacoma International to Helsinki Vantaa.
As of July 2025, there are 37 flights per week flying from Seattle / Tacoma International to Helsinki Vantaa.
The cheapest month to fly from Seattle / Tacoma International to Helsinki Vantaa is usually September.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Seattle / Tacoma International Airport to Helsinki Vantaa Airport on Wednesday, 10 September 2025.
Yes – the average flight time is 9 hours and 30 minutes.
We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to Helsinki Vantaa but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.
We crunched all the numbers in our flight calendar and it looks like the cheapest time to book a flight to Helsinki is around 40 days in advance, so don’t leave your flight to the last minute.
Currently, Scandinavian Airlines and Finnair offer the cheapest flight tickets to Helsinki Vantaa.

Travelling from Seattle-Tacoma International Airport (SEA) to Helsinki-Vantaa Airport (HEL): what you need to know

  • Around 9 hours 15 minutes is how long you'll be travelling on a direct flight from Seattle-Tacoma International Airport to Helsinki-Vantaa Airport.

  • The timezone in Helsinki is UTC+2, which is nine hours ahead of Seattle.

  • For a smooth journey, arrive at the airport two hours ahead of international flights and an hour before domestic departures. This will give you plenty of time to catch your SEA to HEL flight.

  • You can expect bigger queues in popular months like July. Arriving up to four hours in advance for international flights and two hours for domestic departures will help ensure a smooth travel experience.

  • Getting to Helsinki (and then discovering more of Finland!) is a snap with Finnair. This popular carrier offers direct flights from Seattle-Tacoma International Airport to Helsinki-Vantaa Airport.

  • The airline with the highest booking volume on this route is Finnair.

  • We make it a piece of cake to book a flight with a stopover. To see your options for tickets from Seattle-Tacoma International Airport to Helsinki-Vantaa Airport, uncheck 'Direct flights only.' Then, choose a flight that has a stop long enough to tour your chosen city. Some great stopovers between SEA and HEL include:

    • Keflavik International Airport

    • Amsterdam Airport Schiphol

    • London Heathrow Airport

How to find the cheapest flights from Seattle-Tacoma International Airport (SEA) to Helsinki-Vantaa Airport (HEL)

  • 232 € is the best price for a one-way Seattle-Tacoma International Airport to Helsinki-Vantaa Airport flight. A return flight starts at 434 €. These fares may change based on availability and demand.

  • Score cheap tickets from SEA to HEL by booking one month ahead. Based on our research, that's the sweet spot for finding the biggest deals.

  • The cheapest month for flights from Seattle-Tacoma International Airport to Helsinki-Vantaa Airport is December. Use the 'Whole month' tool to find the lowest airfares if you have flexible travel dates.

  • Cut down on the time spent looking for cheap flights from SEA to HEL by setting up a Price Alert. We'll send you an email or notification through the app when a lower fare becomes available.

  • Pick your preferred arrival and departure times, airlines and number of stops with the filters. Or sort your results by 'Cheapest' to find the best deals on flights from Seattle-Tacoma International Airport to Helsinki-Vantaa Airport.

Handy information about Seattle-Tacoma International Airport (SEA)

  • Seattle-Tacoma International Airport has an excellent on-time performance, making delays less likely. Departures from SEA touch down on schedule 81.27% of the time.

  • To get to Seattle-Tacoma International Airport from central Seattle, it takes around 20 minutes if you're going by car. This depends on traffic, however. It's approximately 23 kilometres from the airport to the city centre.

  • The trip when using public transport takes about 55 minutes.

  • Have an early flight from Seattle-Tacoma International Airport to Helsinki-Vantaa Airport? Avoid the last-minute rush to the airport (and enjoy a little extra shut-eye) by choosing one of these hotels near SEA:

Arriving at Helsinki-Vantaa Airport (HEL)

  • If you're landing on a late Seattle-Tacoma International Airport to Helsinki-Vantaa Airport flight, nothing tops the convenience of staying near the terminal. Collect your bags from the carousel and then be showered and snoozing shortly after at one of these hotels near HEL:

  • Grab a Helsinki-Vantaa Airport rental car and discover Helsinki and beyond with your own set of wheels. Green Motion, Alamo and addCar are well-known companies you can book with here.

  • Reserving your ride from Helsinki-Vantaa Airport about two weeks ahead gives you the best shot at securing a great deal.

Getting from Helsinki-Vantaa Airport (HEL) to central Helsinki

  • Helsinki-Vantaa Airport is approximately 19 kilometres from central Helsinki. The drive time takes about 30 minutes.

  • Travelling to the centre on public transport will take you around 45 minutes.

When to fly to Helsinki-Vantaa Airport (HEL)

  • It's time to choose your dates for your flight from Seattle-Tacoma International Airport to Helsinki-Vantaa Airport. June is the most popular month to head to Helsinki. If you'd like a quieter vibe, go in February.

  • Before locking in your flight from Seattle-Tacoma International Airport to Helsinki-Vantaa Airport, think about the kind of weather you enjoy. July is the warmest month in Helsinki, with the temperature ranging from 12ºC (54ºF) to 26ºC (79ºF).

  • Look for cheap tickets from SEA to HEL in January if you like cooler conditions. Temperatures are at their lowest then, ranging between -12ºC (10ºF) and 3ºC (37ºF) on average.

Explore more of Finland

  • Helsinki has loads to offer, but there are so many other parts of Finland waiting to be discovered. About 16 kilometres west of Helsinki, a visit to Espoo will keep your itinerary packed. Start with attractions like Kannusilta riverside walk, Leijonapuisto and Olarsängen.

  • Around 161 kilometres north-west of Helsinki, Tampere is another favourite stop in Finland. Experience this destination's highlights firsthand at Tampere Cathedral, Pyynikki Observation Tower and Moomin Museum.

Plan the rest of your trip from Seattle to Helsinki

Prices shown on this page are estimated lowest prices only. Found in the last 45 days.