$672 Cheap Flights from Copenhagen (CPH) to Seattle (SEA)

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Find available prices by choosing your travel dates.

Cheap Flights from Copenhagen to Seattle (CPH-SEA)

Prices were available within the past 7 days and start at $672 for one-way flights and $493 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

American Airlines
American Airlines
American Airlines
American Airlines
American Airlines
British Airways
Icelandair
Scandinavian Airlines
United
Lufthansa
Flights from Copenhagen (CPH) to Seattle (SEA)
Origin airport
Kastrup
Destination airport
Seattle - Tacoma Intl.
Airlines serving
Air Canada, Air France, American Airlines, British Airways, Brussels Airlines, Delta, Finnair, Icelandair, KLM, Lufthansa, Scandinavian Airlines, Swiss International Air Lines, Turkish Airlines, United, Virgin Atlantic
Roundtrip price
$492
Distance
4852 mi

Copenhagen to Seattle Flights

The cheapest times to fly from Copenhagen to Seattle

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 Copenhagen to Seattle are during the month of September. You can find some of the cheapest flights from Copenhagen to Seattle with Expedia's search tool and vast selection of airlines.

The best time to book a flight from Copenhagen to Seattle

Sunday is one of the best days to book for cheap flights from Copenhagen to Seattle: 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 Copenhagen to Seattle

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 Copenhagen to Seattle in 2025. You can also book with separate airlines for your outbound and return journeys, from $672 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 Copenhagen to Seattle 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 Copenhagen to Seattle 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

Is it cheaper to buy a plane ticket from CPH to Sea-Tac Airport last minute?
Booking your flight from CPH to Sea-Tac Airport at the last minute could save you a pretty penny if you’re lucky enough to find a real bargain. However, fares usually don’t drop in price as the date of departure nears. If you hold out, flights could also be booked solid or the best seats gone (that could mean the middle seat!). If you don’t want to hedge your bets, book well ahead of your departure date. In fact, Expedia has some of the biggest deals up to a year in advance. If your favorite airline hasn’t released tickets yet, check back regularly as offers are updated on Expedia all the time.
What airports do you fly into for Seattle from Copenhagen?
From Copenhagen, you can reach Seattle through Seattle - Tacoma Intl. Airport (SEA), Renton Municipal Airport (RNT) and Boeing Field Airport (BFI). Check which hub is the best option for you before making your decision. If you choose Seattle - Tacoma Intl. Airport (SEA), it’s around 12 mi south of the downtown area. Use the cash you save when booking your seat with Expedia to tour the city’s popular attractions, such as Space Needle and Pike Place Market.
Can I change the date of my flight from CPH to Seattle - Tacoma Intl. Airport (SEA)?
We know plans can change, so Expedia is here to help make things as simple as possible. To start, find your Kastrup Airport (CPH) to Sea-Tac Airport itinerary through the Expedia Trips portal and look up the ticket rules and conditions to see if you can make changes. If you purchased your airfare in the last 24 hours, some carriers will let you cancel for free and organize new flights. If you booked more than 24 hours ago, contact us via our Customer Service portal to find out what your options are.

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*Available to One Key members.