Cheap flights from Copenhagen to Seattle from $399

In general, November is the cheapest month to fly from Copenhagen to Seattle. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $541. If you don’t want to visit Seattle in November, then you should wait until January to fly from Copenhagen, when ticket prices are also cheap, with an average price of $584.

On average, the least expensive day to fly to Seattle from Copenhagen is on a Friday. momondo users have found tickets for Friday departures for as low as $972. However, this price may fluctuate depending on the airline, the season, and holidays. On the other hand, Sunday is the most expensive day to depart from Copenhagen because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $1,408.

Fly from Kastrup Copenhagen to Seattle/Tacoma Intl for the best Kastrup Copenhagen - Seattle/Tacoma Intl flight prices

You are more likely to see cheaper flights to Seattle from Copenhagen when booking weeks ahead of your departure date. In general, you can expect to find flights to Seattle for around $702 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Seattle from Copenhagen for as low as $658 on momondo.

There are 3 cabin classes available to choose from on Copenhagen 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 40% on your flight if you consider stops on a Copenhagen to Seattle flight.

Finnair is the most popular carrier operating from Kastrup Copenhagen to Seattle/Tacoma Intl

Icelandair, Scandinavian Airlines and Delta are the top three most popular airlines that fly to Seattle from Copenhagen according to our data. Icelandair is the first choice among our users, with 40% of people opting to fly with this airline when traveling to Seattle. Keep in mind that there are 4 different airlines that fly to Seattle on a routine basis, so you have a few additional options to choose from.

Historically, on average around 11% of flights between Copenhagen and Seattle have experienced a delay on any given week. The average delay length over the past 12 months has been 127 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. Friday has historically seen more delays on average compared to the rest of the week.

According to our data, Scandinavian Airlines have had the least number of delays on this route over the last 12 months; with about 11% of their flights experiencing any sort of delay.

Reykjavik (KEF) was the most common stop: 46% of momondo users choosing 1-stop flights on this route connected there.

Flights via Reykjavik (KEF) offer the lowest average round-trip price of $592.

Flights connecting via Helsinki (HEL) have the shortest average one-way travel time: 12h 35m.

Munich (MUC) has the shortest average layover time for this route: 1h 00m.

As of July 2026, 1 flights take off from Copenhagen and land in Seattle each day. The most common flight departure time for this route is 1:00PM, with 100% of daily flights taking off in the afternoon.

As of July 2026, there are 12 flights per week flying from Copenhagen to Seattle. The most common day of the week flights depart is Tue, with 25% of flights taking off on this day.