Cheap flights from Helsinki to Seattle from $453

In general, October is the cheapest month to fly from Helsinki to Seattle. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $873. If you don’t want to visit Seattle in October, then you should wait until May to fly from Helsinki, when ticket prices are also cheap, with an average price of $876.

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

You are more likely to see cheaper flights to Seattle from Helsinki when booking weeks ahead of your departure date. In general, you can expect to find flights to Seattle for around $963 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Seattle from Helsinki for as low as $799 on momondo.

There is only 1 cabin class available to choose from on Helsinki to Seattle 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 39% on your flight if you consider stops on a Helsinki to Seattle flight.

As of November 2026, prices for Helsinki to Seattle flights are approximately 49% cheaper when compared to flights at the same time last year.

Historically, on average around 32% of flights between Helsinki and Seattle have experienced a delay on any given week. The average delay length over the past 12 months has been 107 minutes.

Generally, flights departing in the early afternoon tend to experience fewer delays. Flights in the early afternoon have, in the past, seen delays more frequently in comparison.

Monday is statistically the day of the week which experiences the fewest number of delays on this flight route. Sunday has historically seen more delays on average compared to the rest of the week.

According to our data, Finnair have had the least number of delays on this route over the last 12 months; with about 32% of their flights experiencing any sort of delay.

Copenhagen (CPH) was the most common stop: 50% of momondo users choosing 1-stop flights on this route connected there.

Flights via Copenhagen (CPH) offer the lowest average round-trip price of $808.

Flights connecting via Copenhagen (CPH) have the shortest average one-way travel time: 12h 30m.

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