Cheap flights from Seattle to Helsinki from $343
This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Seattle to Helsinki departing on 10/11. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Use the filters below to find and compare flights from Seattle to Helsinki that are best for you.
Fly from
Fly to
Route
Depart
Return
SeattleHelsinki
SEA Seattle/Tacoma Intl - HEL Helsinki-Vantaa
SEAHEL
Seattle/Tacoma Intl
Mon 11/16
7:45 am-10:25 pm
3 stops28h 40m
Helsinki-Vantaa
Mon 11/23
7:50 pm-6:22 pm
3 stops32h 32m
SeattleHelsinki
SEA Seattle/Tacoma Intl - HEL Helsinki-Vantaa
SEAHEL
Seattle/Tacoma Intl
Mon 11/16
7:45 am-10:25 pm
3 stops28h 40m
Helsinki-Vantaa
Mon 11/23
7:50 pm-6:22 pm
3 stops32h 32m
SeattleHelsinki
SEA Seattle/Tacoma Intl - HEL Helsinki-Vantaa
SEAHEL
Seattle/Tacoma Intl
Wed 12/2
3:21 pm-10:30 am
2 stops33h 09m
Helsinki-Vantaa
Thu 12/10
6:15 am-10:02 pm
2 stops25h 47m
SeattleHelsinki
SEA Seattle/Tacoma Intl - HEL Helsinki-Vantaa
SEAHEL
Seattle/Tacoma Intl
Sun 1/10
7:20 am-10:35 am
2 stops41h 15m
Helsinki-Vantaa
Mon 1/18
4:05 pm-12:09 am
2 stops42h 04m
SeattleHelsinki
SEA Seattle/Tacoma Intl - HEL Helsinki-Vantaa
SEAHEL
Seattle/Tacoma Intl
Wed 10/28
3:35 pm-1:00 pm
1 stop12h 25m
Helsinki-Vantaa
Sat 11/7
2:00 pm-5:00 pm
1 stop13h 00m
SeattleHelsinki
SEA Seattle/Tacoma Intl - HEL Helsinki-Vantaa
SEAHEL
Seattle/Tacoma Intl
Wed 2/24
2:35 pm-1:00 pm
1 stop12h 25m
Helsinki-Vantaa
Wed 3/3
11:10 am-5:00 pm
2 stops15h 50m
SeattleHelsinki
SEA Seattle/Tacoma Intl - HEL Helsinki-Vantaa
SEAHEL
Seattle/Tacoma Intl
Tue 11/10
4:05 pm-4:40 pm
1 stop14h 35m
Helsinki-Vantaa
Tue 11/17
6:40 am-11:47 am
1 stop15h 07m
SeattleHelsinki
SEA Seattle/Tacoma Intl - HEL Helsinki-Vantaa
SEAHEL
Seattle/Tacoma Intl
Tue 11/17
4:05 pm-4:40 pm
1 stop14h 35m
Helsinki-Vantaa
Mon 11/30
2:05 pm-11:50 am
1 stop31h 45m
SeattleHelsinki
SEA Seattle/Tacoma Intl - HEL Helsinki-Vantaa
SEAHEL
Seattle/Tacoma Intl
Wed 12/16
10:27 am-11:40 am
1 stop15h 13m
Helsinki-Vantaa
Thu 1/7
12:30 pm-8:02 pm
1 stop17h 32m
SeattleHelsinki
SEA Seattle/Tacoma Intl - HEL Helsinki-Vantaa
SEAHEL
Seattle/Tacoma Intl
Fri 12/18
10:27 am-11:40 am
1 stop15h 13m
Helsinki-Vantaa
Fri 1/15
7:50 am-4:50 pm
1 stop19h 00m
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?
Prices are currently low for flights on this route.
Typical prices usually range from $865 to $938.The lowest price recently found on this route was $536.
What is the cheapest month to fly to Helsinki?
The month of January is, on average, the cheapest month to fly to Helsinki from Seattle, with most prices found around $543. If you aren’t able to travel during the month of January, then book flights to Helsinki from Seattle during September instead. Flights to Helsinki in September, while not as cheap as those in January, still average around $743.
What is the cheapest day to depart on your flight to Helsinki?
The cheapest day to depart on your flight to Helsinki is on a Wednesday when prices can be found for as low as $786. 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 Sunday will generally be more expensive and average around $1,208. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.
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 from Seattle to Helsinki?
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 $923 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 $800 on momondo.
What cabin class options are available on Seattle to Helsinki flights?
There are 3 cabin classes available to choose from on Seattle to Helsinki 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.
What is the cheapest airline that flies from Seattle/Tacoma Intl to Helsinki-Vantaa?
Finnair is the most popular carrier operating from Seattle/Tacoma Intl to Helsinki-Vantaa
What airlines fly to Helsinki?
Icelandair, Scandinavian Airlines and Finnair 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 58% of people opting to fly with this airline when traveling to Helsinki. Keep in mind that there are 4 different airlines that fly to Helsinki on a routine basis, so you have a few additional options to choose from.
Which airport is the most popular layover for flights between Seattle and Helsinki?
Reykjavik (KEF) was the most common stop: 78% 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 $333.
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: 14h 58m.
Which layover airport has the shortest connection time from Seattle to Helsinki?
Reykjavik (KEF) has the shortest average layover time for this route: 2h 40m.
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
Frequently asked questions about flying from Seattle to Helsinki
How far is Seattle/Tacoma Intl to Helsinki-Vantaa by plane?
The distance between Seattle/Tacoma Intl and Helsinki-Vantaa is about 4763.3 mi. Flights usually cover this in 21h 35m, depending on flying conditions and air traffic around both airports.
When did momondo last update prices for flights from Seattle/Tacoma Intl Airport to Helsinki-Vantaa Airport?
Prices for flights from Seattle/Tacoma Intl Airport to Helsinki-Vantaa Airport are refreshed on a daily basis.
How many operators does momondo search for flights from Seattle/Tacoma Intl Airport to Helsinki-Vantaa Airport?
As of October 2026, there are 4 operators available to choose from 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?
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.
What documentation or ID do you need to fly to Helsinki-Vantaa Airport?
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.
What is the most popular plane model from Seattle to Helsinki?
momondo data reveals that the most frequently booked plane model on the route from Seattle to Helsinki is Airbus A330-300, representing 38.00% of all bookings. The subsequent popular models are Airbus A350-900 at 10.00%, Airbus A330-900neo at 10.00%, and Boeing 787-10 Dreamliner at 6.00%.
What is the most popular airline from Seattle to Helsinki?
Based on momondo bookings for flights between Seattle and Helsinki, the leading airline is Icelandair, making up 58% of the total bookings. Other popular airlines include Scandinavian Airlines with 19%, Finnair with 19%, and Delta with 5%.
Best airlines flying from Seattle to Helsinki
Compare and see reviews for airlines that fly from Seattle to Helsinki with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom $353 | Free Cancellation | Rating 7.4 2,007 reviews | |||
| PriceFrom $528 | Free Cancellation | Rating 6.9 757 reviews | |||
| PriceFrom $731 | Free Cancellation | Rating 7.8 8,634 reviews | |||
| PriceFrom $845 | Free Cancellation | Rating 7.6 1,428 reviews |
Traveling to a place near Helsinki?
Book flights to Helsinki if you plan to visit one of these locationsWhy use momondo?
Why should I use momondo to find a flight deal from Seattle to Helsinki?
momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Seattle to Helsinki. momondo saves you time and could save you money on your trip.
Can I find flights from Seattle to Helsinki with flexible booking policies on momondo?
Yes. All flights to Helsinki from Seattle on momondo can be compared and filtered by various policies on offer, including flexible booking.
How can momondo help me find flights from Seattle to Helsinki?
momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight 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?
Yes momondo offers price alerts on flights to Helsinki from Seattle. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.