Question 1

What is the cheapest day to depart on your flight to Seattle?

Accepted Answer

On average, the least expensive day to fly to Seattle from Copenhagen is on a Saturday. momondo users have found tickets for Saturday departures for as low as $649. 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 $1,153.

Question 2

Which layover airport has the shortest travel time from Copenhagen to Seattle?

Accepted Answer

Flights connecting via Amsterdam (AMS) have the shortest average one-way travel time: 13h 10m.

Question 3

Can stopping save me money on Copenhagen to Seattle flights?

Accepted Answer

You could potentially save up to 39% on your flight if you consider stops on a Copenhagen to Seattle flight.

Question 4

What is the cheapest time of day to depart on your flight to Seattle?

Accepted Answer

Flying to Seattle from Copenhagen in the evening is the least expensive time of day to depart. momondo users have found prices as low as $563 when looking at flights departing in the evening. Flights to Seattle are more costly at noon, with an average ticket price of $938. Departure times at noon fall within the peak daily travel times, which is why tickets can be more expensive.

Question 5

How far in advance should I book a flight to Seattle?

Accepted Answer

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 $629 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 $576 on momondo.

Question 6

What cabin class options are available on Kastrup Copenhagen to Seattle/Tacoma Intl flights?

Accepted Answer

There are 3 cabin classes available to choose from on Kastrup Copenhagen to Seattle/Tacoma Intl flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Question 7

Which layover airport has the shortest connection time from Copenhagen to Seattle?

Accepted Answer

Amsterdam (AMS) has the shortest average layover time for this route: 1h 25m.

Question 8

Which layover airport offers the lowest fares from Copenhagen to Seattle?

Accepted Answer

Flights via Helsinki (HEL) offer the lowest average round-trip price of $449.

Question 9

What day of the week experiences the fewest flight delays on this route?

Accepted Answer

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.

Question 10

Which airline has the best punctuality record on Copenhagen to Seattle flights?

Accepted Answer

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.

Question 11

How have Copenhagen to Seattle flight prices changed over time?

Accepted Answer

As of November 2025, prices for Copenhagen to Seattle flights are approximately 10% more expensive when compared to flights at the same time last year.

Question 12

What airlines fly to Seattle?

Accepted Answer

Icelandair, Scandinavian Airlines and British Airways 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 30% of people opting to fly with this airline when traveling to Seattle. Keep in mind that there are 6 different airlines that fly to Seattle on a routine basis, so you have a few additional options to choose from.

Question 13

How often are flights from Copenhagen to Seattle delayed?

Accepted Answer

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.

Question 14

What is the cheapest month to fly to Seattle?

Accepted Answer

In general, February 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 $460. If you don’t want to visit Seattle in February, then you should wait until January to fly from Copenhagen, when ticket prices are also cheap, with an average price of $495.

Question 15

What is the cheapest Kastrup Copenhagen to Seattle/Tacoma Intl flight route?

Accepted Answer

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

Question 16

Which airport is the most popular layover for flights between Copenhagen and Seattle?

Accepted Answer

Reykjavik (KEF) was the most common stop: 63% of momondo users choosing 1-stop flights on this route connected there.

Question 17

What is the cheapest airline that flies from Kastrup Copenhagen to Seattle/Tacoma Intl?

Accepted Answer

Finnair and American Airlines are the most popular carriers operating from Kastrup Copenhagen to Seattle/Tacoma Intl

Question 18

What is the most punctual flight time for Copenhagen to Seattle flights?

Accepted Answer

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.

Question 19

When did momondo last update prices for flights from Kastrup Copenhagen Airport to Seattle/Tacoma Intl Airport?

Accepted Answer

Prices for flights from Kastrup Copenhagen Airport to Seattle/Tacoma Intl Airport refresh daily.

Question 20

How many operators does momondo search for flights from Kastrup Copenhagen Airport to Seattle/Tacoma Intl Airport?

Accepted Answer

The number of operators available for flights from Kastrup Copenhagen Airport to Seattle/Tacoma Intl Airport is 6 as of November 2025.

Question 21

How old do you have to be to fly from Kastrup Copenhagen Airport to Seattle/Tacoma Intl Airport?

Accepted Answer

The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Kastrup Copenhagen Airport to Seattle/Tacoma Intl Airport.

Question 22

What documentation or ID do you need to fly to Seattle/Tacoma Intl Airport?

Accepted Answer

The required travel and health documents for your Seattle/Tacoma Intl Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Seattle/Tacoma Intl Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

Fastest flight time	12h 30m
Direct flights	None

Airline	Rating	Free Cancellation	Price
Icelandair	PriceFrom $430	Free Cancellation	Rating 7.0 582 reviews	Search Icelandair flights
American Airlines	PriceFrom $462	Free Cancellation	Rating 7.2 11,037 reviews	Search American Airlines flights
British Airways	PriceFrom $463	Free Cancellation	Rating 6.7 7,539 reviews	Search British Airways flights
United Airlines	PriceFrom $533	Free Cancellation	Rating 7.4 9,050 reviews	Search United Airlines flights
Lufthansa	PriceFrom $544	Free Cancellation	Rating 6.8 7,594 reviews	Search Lufthansa flights
Scandinavian Airlines	PriceFrom $600	Free Cancellation	Rating 7.4 1,589 reviews	Search Scandinavian Airlines flights

Cheap flights from Copenhagen to Seattle from $331

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Copenhagen to Seattle departing on 3/23. 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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How to get the cheapest flight ticket from Copenhagen to Seattle

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 cheapest month to fly to Seattle?

What is the cheapest day to depart on your flight to Seattle?

What is the cheapest time of day to depart on your flight to Seattle?

What is the cheapest Kastrup Copenhagen to Seattle/Tacoma Intl flight route?

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

How far in advance should I book a flight to Seattle?

What cabin class options are available on Kastrup Copenhagen to Seattle/Tacoma Intl flights?

There are 3 cabin classes available to choose from on Kastrup Copenhagen to Seattle/Tacoma Intl 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 Copenhagen to Seattle flights?

You could potentially save up to 39% on your flight if you consider stops on a Copenhagen to Seattle flight.

How have Copenhagen to Seattle flight prices changed over time?

As of November 2025, prices for Copenhagen to Seattle flights are approximately 10% more expensive when compared to flights at the same time last year.

What is the cheapest airline that flies from Kastrup Copenhagen to Seattle/Tacoma Intl?

Finnair and American Airlines are the most popular carriers operating from Kastrup Copenhagen to Seattle/Tacoma Intl

What airlines fly to Seattle?

How often are flights from Copenhagen to Seattle delayed?

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.

What is the most punctual flight time for Copenhagen to Seattle flights?

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.

What day of the week experiences the fewest flight delays on this route?

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.

Which airline has the best punctuality record on Copenhagen to Seattle flights?

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.

Which airport is the most popular layover for flights between Copenhagen and Seattle?

Reykjavik (KEF) was the most common stop: 63% of momondo users choosing 1-stop flights on this route connected there.

Which layover airport offers the lowest fares from Copenhagen to Seattle?

Flights via Helsinki (HEL) offer the lowest average round-trip price of $449.

Which layover airport has the shortest travel time from Copenhagen to Seattle?

Flights connecting via Amsterdam (AMS) have the shortest average one-way travel time: 13h 10m.

Which layover airport has the shortest connection time from Copenhagen to Seattle?

Amsterdam (AMS) has the shortest average layover time for this route: 1h 25m.

When to book flights from Copenhagen to Seattle

Cheap Copenhagen to Seattle (CPH to SEA) flight deals and tips

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How far is Kastrup Copenhagen to Seattle/Tacoma Intl by plane?

When did momondo last update prices for flights from Kastrup Copenhagen Airport to Seattle/Tacoma Intl Airport?

How many operators does momondo search for flights from Kastrup Copenhagen Airport to Seattle/Tacoma Intl Airport?

How old do you have to be to fly from Kastrup Copenhagen Airport to Seattle/Tacoma Intl Airport?

What documentation or ID do you need to fly to Seattle/Tacoma Intl Airport?

What is the most popular plane model from Copenhagen to Seattle?

What is the most popular airline from Copenhagen to Seattle?

Best airlines flying from Copenhagen to Seattle

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