Cheap flights from Seattle to Helsinki from $269

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 October instead. Flights to Helsinki in October, while not as cheap as those in January, still average around $571.

The cheapest day to depart on your flight to Helsinki is on a Wednesday when prices can be found for as low as $666. 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 $1,184. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

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

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 $867 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 $595 on momondo.

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.

You could potentially save up to 25% on your flight if you consider stops on a Seattle to Helsinki flight.

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

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 52% of people opting to fly with this airline when traveling to Helsinki. Keep in mind that there are 5 different airlines that fly to Helsinki on a routine basis, so you have a few additional options to choose from.

Reykjavik (KEF) was the most common stop: 57% of momondo users choosing 1-stop flights on this route connected there.

Flights via Amsterdam (AMS) offer the lowest average round-trip price of $844.

Flights connecting via Amsterdam (AMS) have the shortest average one-way travel time: 14h 36m.

Reykjavik (KEF) has the shortest average layover time for this route: 2h 40m.

The number of flights available between Seattle and Helsinki is 2 per day as of June 2026. The most frequent departure time is 5:00PM, with 100% of daily flights leaving in the afternoon.

The number of flights available between Seattle and Helsinki is 15 per week as of June 2026. The most frequent departure day is Tue, with 33% of weekly flights leaving on this day.