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$303+ Cheap flights from Seattle (SEA) to Copenhagen (CPH)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 1/9. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — CPH
Nov 26 — Dec 31
Wed 11/26
Wed 12/3
1 adult, Economy
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Find cheap flights from Seattle to Copenhagen with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

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Cheapflights Tip: The best prices from Seattle/Tacoma Intl to Kastrup Copenhagen are usually found in February or January, booked 90 days in advance, depart on a Tuesday or Monday and return on a Thursday

Cheap flight deals from Seattle to Copenhagen

Discover tips and strategies to find the most affordable flight options for your journey from Seattle (SEA) to Copenhagen (CPH). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated October 27, 2025.

Most accurate provider

CheapOair
3 stars

Most trusted provider

CheapOair
3 stars

Round-trip from

$421
(Flybillet)

One-way from

$303
(Kiwi.com)

Popular in

June

Cheapest in

February

Average price

$617

Good round-trip deal

$533 or less

Good one-way deal

$402 or less
Provider with most accurate pricing for Seattle/Tacoma Intl-Kastrup Copenhagen flight deals.
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Provider most trusted by Cheapflights users for Seattle/Tacoma Intl-Kastrup Copenhagen flights.
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From Seattle/Tacoma Intl to Kastrup Copenhagen
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One-way flight from Seattle/Tacoma Intl to Kastrup Copenhagen
Search Deals
Highest demand for flights based on searches. 10% potential increase in price ($73 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($13 potential savings vs. average RT price).
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Average for round-trip flights in October 2025
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Price to beat on a round-trip flight from Seattle/Tacoma Intl to Kastrup Copenhagen.
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Price to beat on a one-way flight from Seattle/Tacoma Intl to Kastrup Copenhagen.
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Find flight deals from Seattle to Copenhagen

Cheapest flights from Seattle to Copenhagen
Explore the most affordable flight options available from Seattle to Copenhagen. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 27, 2025.

This Flybillet deal was found by Cheapflights users on 10/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Flybillet is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/172:35 pmSEA - CPH
1 stop29h 40mIcelandair
Wed 12/39:30 pmCPH - SEA
1 stop28h 30mIcelandair
Deal found 10/26$421
This Mytrip deal was found by Cheapflights users on 10/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/102:35 pmSEA - CPH
1 stop21h 00mIcelandair
Wed 12/176:15 amCPH - SEA
1 stop19h 45mIcelandair
Deal found 10/26$449
This Kiwi.com deal was found by Cheapflights users on 10/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/93:10 pmSEA - CPH
1 stop22h 55mLufthansa
Sat 11/156:50 amCPH - SEA
1 stop14h 20mLufthansa
Deal found 10/26$490
This FlightHub deal was found by Cheapflights users on 10/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/252:35 pmSEA - CPH
1 stop12h 10mIcelandair
Sun 1/1112:55 pmCPH - SEA
1 stop13h 05mIcelandair
Deal found 10/27$496
This Icelandair deal was found by Cheapflights users on 10/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Icelandair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/22:35 pmSEA - CPH
1 stop21h 00mIcelandair
Thu 11/612:55 pmCPH - SEA
1 stop13h 05mIcelandair
Deal found 10/24$500
This Kiwi.com deal was found by Cheapflights users on 10/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/112:00 pmSEA - CPH
1 stop13h 15mLufthansa
Sat 11/156:50 amCPH - SEA
1 stop14h 20mLufthansa
Deal found 10/26$504
This CrystalTravel deal was found by Cheapflights users on 10/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CrystalTravel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/62:35 pmSEA - CPH
1 stop12h 10mIcelandair
Wed 11/126:15 amCPH - SEA
1 stop19h 45mIcelandair
Deal found 10/26$505
This Mytrip deal was found by Cheapflights users on 10/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/910:05 amSEA - CPH
2 stops22h 30mMultiple Airlines
Wed 11/196:50 amCPH - SEA
2 stops21h 26mMultiple Airlines
Deal found 10/25$507
This Mytrip deal was found by Cheapflights users on 10/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/910:05 amSEA - CPH
2 stops22h 30mMultiple Airlines
Mon 11/246:55 amCPH - SEA
1 stop14h 15mMultiple Airlines
Deal found 10/26$508
This Flybillet deal was found by Cheapflights users on 10/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Flybillet is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/173:40 pmSEA - CPH
2 stops40h 55mLufthansa
Wed 12/36:50 amCPH - SEA
2 stops21h 26mLufthansa
Deal found 10/26$509

Cheapflights Fare Finder

 
Customize your flight search to find flights from Seattle to Copenhagen that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated October 27, 2025.
Use the filters below to find and compare flights from Seattle to Copenhagen that are best for you.

Fly from

Seattle

Fly to

Copenhagen

Route

Depart

Return

Price

SeattleCopenhagen

SEA - CPH

SEACPH

Seattle/Tacoma Intl

Thu 12/25

2:35 pm-11:45 am

1 stop12h 10m

Kastrup Copenhagen

Sun 1/11

12:55 pm-5:00 pm

1 stop13h 05m

$496

SeattleCopenhagen

SEA - CPH

SEACPH

Seattle/Tacoma Intl

Wed 11/26

6:50 pm-7:00 pm

1 stop15h 10m

Kastrup Copenhagen

Wed 4/15

10:20 am-9:46 pm

2 stops20h 26m

$517

SeattleCopenhagen

SEA - CPH

SEACPH

Seattle/Tacoma Intl

Sun 11/9

10:05 am-11:05 pm

2 stops28h 00m

Kastrup Copenhagen

Fri 11/14

6:50 am-12:10 pm

1 stop14h 20m

$529

SeattleCopenhagen

SEA - CPH

SEACPH

Seattle/Tacoma Intl

Sun 11/16

3:10 pm-5:35 pm

1 stop17h 25m

Kastrup Copenhagen

Fri 11/21

6:50 am-12:10 pm

1 stop14h 20m

$529

SeattleCopenhagen

SEA - CPH

SEACPH

Seattle/Tacoma Intl

Sun 11/9

10:05 am-5:35 pm

2 stops22h 30m

Kastrup Copenhagen

Thu 11/13

7:05 am-9:31 am

2 stops35h 26m

$533

SeattleCopenhagen

SEA - CPH

SEACPH

Seattle/Tacoma Intl

Sun 11/9

10:05 am-5:35 pm

2 stops22h 30m

Kastrup Copenhagen

Sat 11/15

6:50 am-9:31 am

2 stops35h 41m

$533

SeattleCopenhagen

SEA - CPH

SEACPH

Seattle/Tacoma Intl

Sun 11/2

3:10 pm-11:05 pm

1 stop22h 55m

Kastrup Copenhagen

Thu 11/6

7:05 am-12:10 pm

1 stop14h 05m

$533

SeattleCopenhagen

SEA - CPH

SEACPH

Seattle/Tacoma Intl

Thu 11/13

12:35 pm-11:05 pm

2 stops25h 30m

Kastrup Copenhagen

Fri 11/21

6:50 am-7:16 pm

2 stops21h 26m

$533

SeattleCopenhagen

SEA - CPH

SEACPH

Seattle/Tacoma Intl

Sun 11/9

3:10 pm-5:35 pm

1 stop17h 25m

Kastrup Copenhagen

Sun 11/16

8:55 am-1:20 pm

1 stop13h 25m

$535

SeattleCopenhagen

SEA - CPH

SEACPH

Seattle/Tacoma Intl

Sun 11/16

12:00 pm-11:05 pm

2 stops26h 05m

Kastrup Copenhagen

Sat 11/22

6:50 am-12:10 pm

1 stop14h 20m

$537

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/26

Showing 1-10 of 19 results
1
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Compare providers for flights from Seattle to Copenhagen

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Seattle to Copenhagen in October.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy2 starsTrust Score*3 stars
CheapOairPrice Accuracy3 starsTrust Score*3 stars
CheapflightsfaresPrice Accuracy3 starsTrust Score*2 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Seattle-Copenhagen flights, users find the pricing of CheapOair to be most consistent on Cheapflights vs. CheapOair Users can find the same prices on Seattle-Copenhagen flight deals on Cheapflights vs. CheapOair >95% of the time. Price accuracy is based on data collected from Seattle-Copenhagen flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Seattle-Copenhagen flights, Cheapflights users trust CheapOair the most. CheapOair has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Seattle-Copenhagen flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Seattle to Copenhagen

Have a flexible travel schedule? Discover the best time to fly to Copenhagen from Seattle with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Seattle to Copenhagen

How far ahead should I book a flight from Seattle to Copenhagen?

Use this chart to determine the optimal time to book a round-trip flight from Seattle to Copenhagen. Price data was last updated on October 24, 2025.

The price you pay for your flight from Seattle to Copenhagen may vary depending on when you book. For the best chance of a lower fare, look to book 90 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

What is the cheapest month to book a flight from Seattle to Copenhagen?

Currently, November is the cheapest month in which you can book a flight from Seattle to Copenhagen (average of $348). Flying from Seattle to Copenhagen in June is currently the most expensive (average of $552). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from SEA to CPH?

Find hourly flight availability from Seattle to Copenhagen. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated October 27, 2025.

Unlike in the morning, when flights are generally more expensive, you can save up to 19% on flights from Seattle to Copenhagen by exploring options for tickets in the evening.

What is the cheapest day to fly from Seattle to Copenhagen?

Use this chart to determine the cheapest time to fly round-trip from Seattle to Copenhagen. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Seattle to Copenhagen flight should consider departing on Saturday evenings when fares are most often at their lowest. Sunday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

How much does it cost to fly round-trip from Seattle to Copenhagen?

The best insider tips for Seattle to Copenhagen flights

Snippets provided in this section are AI-generated based on a summarization of Cheapflights-commissioned articles. The articles are presented as-is, for general informational purposes only, and may not be up-to-date. The opinions contained in the articles are original to the author and reflect their authentic experience, which may vary significantly from the experience of others.
Cheapflights partnered with top experts to bring you the best recommendations for your Seattle to Copenhagen trip
Airports
SEA

Plan to arrive at SEA at least two hours before your flight. Use SEA Spot Saver for security screening appointments to save time.

Read more about SEAby Brandon Schultz
CPH

The Metro is the easiest way to reach Copenhagen from CPH. Trains run every 5 minutes and take about 10-20 minutes to the city center.

Read more about CPHby John Walton
Our travel experts
John Walton

John Walton

Expert on CPH

John Walton

John Walton

Independent aviation journalist John Walton took his first flight at eight weeks old and hasn’t stopped travelling since. A world-renowned expert in airlines and the passenger experience, he writes in depth on aviation, is a resident expert on travel in Japan and France, and offers a uniquely queer perspective on travelling the world.

Read more
Brandon Schultz

Brandon Schultz

Expert on SEA

Brandon Schultz

Brandon Schultz

Brandon Schultz is an award-winning food and travel writer based in New York City. His work has appeared in Forbes, AAA, Thrillist, Travel + Leisure, and The Daily Meal, among many others, and he is the author of 6 books, including 3 cookbooks.

Read more

Reviews of airlines servicing Copenhagen

Get insights into the airlines that provide service to Copenhagen. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Copenhagen. Reviews last updated October 27, 2025.
Read through reviews of airlines operating flights from Seattle to Copenhagen, such as Delta, Scandinavian Airlines, and Icelandair. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Delta
7.9
Good
7,996 reviews

Crew

8.5

Entertainment

7.9

Boarding

8.2

Comfort

7.9

Overall

7.9

Food

7.3

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
Delta
7.9
Good
7,996 reviews
Delta
7.9
Good
7,996 reviews

Crew

8.5

Entertainment

7.9

Boarding

8.2

Comfort

7.9

Overall

7.9

Food

7.3

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
Scandinavian Airlines
7.4
Good
1,543 reviews
Delta
7.9
Good
7,996 reviews

Crew

8.5

Entertainment

7.9

Boarding

8.2

Comfort

7.9

Overall

7.9

Food

7.3

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
Icelandair
7.1
Good
562 reviews
Delta
7.9
Good
7,996 reviews

Crew

8.5

Entertainment

7.9

Boarding

8.2

Comfort

7.9

Overall

7.9

Food

7.3

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
Lufthansa
6.8
Okay
7,532 reviews
Delta
7.9
Good
7,996 reviews

Crew

8.5

Entertainment

7.9

Boarding

8.2

Comfort

7.9

Overall

7.9

Food

7.3

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
British Airways
6.7
Okay
7,479 reviews
Delta
7.9
Good
7,996 reviews

Crew

8.5

Entertainment

7.9

Boarding

8.2

Comfort

7.9

Overall

7.9

Food

7.3

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.

Related info for your journey

Find useful and relevant information for your journey from Seattle to Copenhagen. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How popular is this Seattle to Copenhagen flight route?

    Within the past month, 8 users have taken a look at flights from Seattle/Tacoma Intl to Kastrup Copenhagen.

  • How long is the flight from Seattle to Copenhagen?

    There are many flights that can get you from Seattle to Copenhagen in 12h 10m. Fly via Icelandair, British Airways, or Lufthansa to get the fastest option. The distance between Seattle and Copenhagen is about 4850 mi. This flight may include one or multiple stops.

  • What are the cheapest airlines flying from Seattle to Copenhagen round-trip?

    Air France, at $418, was found to be the cheapest airline from Seattle to Copenhagen.Alternate airlines to your destination round-trip include Icelandair and American Airlines. Air France is 33% cheaper than the average price of flights available within the next 90 days to this destination.

  • What are the most reliable airlines from Seattle to Copenhagen?

    Before booking your flight to Copenhagen from Seattle, check out the most reliable airlines to get you to your destination on time: Air France (89%), Scandinavian Airlines (70%), Delta( 70%).

  • What are the cheapest flights from Seattle to Copenhagen?

    On average you can expect to pay $1,798 for a flight from Seattle to Copenhagen. The cheapest flight overall is $379 while the most popular route, (Seattle/Tacoma Intl - Kastrup Copenhagen) is currently priced at $407.

  • Where are the most common layover locations when flying from Seattle to Copenhagen?

    The most popular layover on flights from Seattle to Copenhagen is Reykjavik.

  • What are some popular things to do or see while on a layover in Reykjavik?

    If you're on a layover in Reykjavik and looking for things to do, consider visiting Harpa, Hallgrímskirkja, or Laugardalslaug Geothermal Pool. Harpa, Hallgrímskirkja, and Laugardalslaug Geothermal Pool are located about 23.3 mi, 23.2 mi, and 24.6 mi, respectively from Reykjavik Keflavik Intl. Those landing in Reykjavik looking to spend some time exploring during their layover can rent a car for about $48 per day.

  • Where are the least popular layover locations for Seattle to Copenhagen flights?

    Seattle to Copenhagen flights have a layover in London the least frequently.

  • Can I find deals for flights from Seattle to Copenhagen that include hotel bookings?

    Yes. In addition to deals on Seattle to Copenhagen flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Seattle to Copenhagen?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Seattle to Copenhagen.

  • Can I find deals for business class flights from Seattle to Copenhagen?

    Yes. Cheapflights offers flight deals from Seattle to Copenhagen by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Seattle to Copenhagen?

    Currently, November is the cheapest month in which you can book a flight from Seattle to Copenhagen (average of $348). Flying from Seattle to Copenhagen in June is currently the most expensive (average of $552). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near Copenhagen?

Book flights to Copenhagen if you plan to visit one of these locations
Kastrup

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Top 10 airlines flying from Seattle to Copenhagen

Discover the top 10 airlines that operate flights from Seattle to Copenhagen. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated October 27, 2025.
AirlineCheapestAverageFlexibilityOn-time
Air FranceCheapest$418Average$619FlexibilityNo cancel feeOn-time77%
IcelandairCheapest$423Average$582FlexibilityNo cancel feeOn-time76%
American AirlinesCheapest$492Average$601FlexibilityNo cancel feeOn-time71%
British AirwaysCheapest$493Average$714FlexibilityNo cancel feeOn-time70%
Scandinavian AirlinesCheapest$496Average$722FlexibilityNo cancel feeOn-time77%
FinnairCheapest$504Average$715FlexibilityNo cancel feeOn-time76%
Air CanadaCheapest$536Average$683FlexibilityNo cancel feeOn-time67%
DeltaCheapest$558Average$783FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$560Average$804FlexibilityNo cancel feeOn-time69%
KLMCheapest$584Average$774FlexibilityNo cancel feeOn-time75%

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