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

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

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

October is typically the cheapest month to fly

From US$392 - US$1,258 per traveler.
Flights from Seattle (SEA) to Helsinki (HEL)
Origin airport
Seattle - Tacoma Intl.
Destination airport
Vantaa
Distance
4767 mi

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 . 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 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.

 

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 or cheap return flight 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)?
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.

Explore a world of travel with Expedia

*Available to One Key members.