$373 Cheap Flights from Cologne (CGN) to Seattle (SEA)

View $373 flight on Sun, Apr 12, 2026Opens in a new window

Popular airlines from Cologne - Bonn Airport (CGN) to Seattle-Tacoma International Airport (SEA)

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Cheap Flights from Cologne to Seattle (CGN-SEA)

Prices were available within the past 7 days and start at $373 for one-way flights and $550 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

British Airways
Sat, Jan 10 - Sat, Jan 17
CGN
Cologne
SEA
Seattle
$550 Roundtrip, found 2 days ago
$550
Roundtrip
found 2 days ago
Select British Airways flight, departing Sat, Jan 10 from Cologne to Seattle, returning Sat, Jan 17, priced at $550 found 2 days ago
British Airways
Sat, Jan 10 - Sat, Jan 17
CGN
Cologne
SEA
Seattle
$554 Roundtrip, found 2 days ago
$554
Roundtrip
found 2 days ago
Select British Airways flight, departing Sat, Jan 10 from Cologne to Seattle, returning Sat, Jan 17, priced at $554 found 2 days ago
British Airways
Fri, Nov 28 - Tue, Dec 2
CGN
Cologne
SEA
Seattle
$562 Roundtrip, found 1 day ago
$562
Roundtrip
found 1 day ago
Select British Airways flight, departing Fri, Nov 28 from Cologne to Seattle, returning Tue, Dec 2, priced at $562 found 1 day ago
British Airways
Fri, May 15 - Tue, Jun 9
CGN
Cologne
SEA
Seattle
$604 Roundtrip, found 5 days ago
$604
Roundtrip
found 5 days ago
Select British Airways flight, departing Fri, May 15 from Cologne to Seattle, returning Tue, Jun 9, priced at $604 found 5 days ago
Lufthansa
Wed, Apr 8 - Thu, Apr 30
CGN
Cologne
SEA
Seattle
$617 Roundtrip, found 2 days ago
$617
Roundtrip
found 2 days ago
Select Lufthansa flight, departing Wed, Apr 8 from Cologne to Seattle, returning Thu, Apr 30, priced at $617 found 2 days ago
Air Canada
Wed, Apr 8 - Thu, Apr 30
CGN
Cologne
SEA
Seattle
$618 Roundtrip, found 2 days ago
$618
Roundtrip
found 2 days ago
Select Air Canada flight, departing Wed, Apr 8 from Cologne to Seattle, returning Thu, Apr 30, priced at $618 found 2 days ago
Lufthansa
Thu, Nov 6 - Fri, Nov 14
CGN
Cologne
SEA
Seattle
$620 Roundtrip, found 2 days ago
$620
Roundtrip
found 2 days ago
Select Lufthansa flight, departing Thu, Nov 6 from Cologne to Seattle, returning Fri, Nov 14, priced at $620 found 2 days ago
Lufthansa
Thu, Nov 6 - Fri, Nov 14
CGN
Cologne
SEA
Seattle
$620 Roundtrip, found 2 days ago
$620
Roundtrip
found 2 days ago
Select Lufthansa flight, departing Thu, Nov 6 from Cologne to Seattle, returning Fri, Nov 14, priced at $620 found 2 days ago
Austrian Airlines
Fri, Nov 14 - Fri, Feb 20
CGN
Cologne
SEA
Seattle
$622 Roundtrip, found 1 day ago
$622
Roundtrip
found 1 day ago
Select Austrian Airlines flight, departing Fri, Nov 14 from Cologne to Seattle, returning Fri, Feb 20, priced at $622 found 1 day ago
United
Thu, Nov 6 - Fri, Nov 14
CGN
Cologne
SEA
Seattle
$643 Roundtrip, found 2 days ago
$643
Roundtrip
found 2 days ago
Select United flight, departing Thu, Nov 6 from Cologne to Seattle, returning Fri, Nov 14, priced at $643 found 2 days ago

Frequently asked questions

How much does a flight from Cologne - Bonn Airport (CGN) to Seattle - Tacoma Intl. Airport (SEA) cost?
Secure a cheap one-way flight from $373 or cheap return flight from $550 from Cologne - Bonn Airport (CGN) to Seattle - Tacoma Intl. Airport (SEA) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight offers on this route.
What is the cheapest month to fly from Cologne - Bonn Airport (CGN) to Seattle - Tacoma Intl. Airport (SEA)?
The cheapest month to fly from CGN to SEA is January, when demand is low. Off-peak months are often when you'll find lower airfares between these airports.
What is the cheapest airline that flies from Cologne - Bonn Airport (CGN) to Seattle - Tacoma Intl. Airport (SEA)?
Use the filter tool on Expedia to compare different airlines and find the cheapest carrier that'll fly you from CGN to SEA. Then, sort your results by "Price (lowest to highest)" to snap up a great deal.
How many flights per day from Cologne - Bonn Airport (CGN) to Seattle - Tacoma Intl. Airport (SEA)?
Direct flights from Cologne - Bonn Airport (CGN) to Seattle - Tacoma Intl. Airport (SEA) aren't available daily, so you'll need to take a flight with a layover. Explore your options with Expedia's filter tool. Enter your travel dates and click on either "1 Stop" or "2+ Stops."
What day of the week has the most flights from CGN to SEA?
You'll typically find Tuesday the quietest day for flights, while Fridays tend to be the busiest.* However this can change from season to season and during peak travel times or public holidays.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Cologne - Bonn Airport (CGN) to Seattle - Tacoma Intl. Airport (SEA)?
Select a flight from Cologne - Bonn Airport (CGN) to Seattle - Tacoma Intl. Airport (SEA) that leaves before 3 PM to reduce the risk of delays and cancellations. Later departures are on average 22% more likely to be canceled.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from Cologne - Bonn Airport (CGN) to Seattle - Tacoma Intl. Airport (SEA) last-minute?
Last-minute fares from CGN to SEA are usually more expensive. To secure the best rates, start searching for flights ahead of time. That being said, if you can play around with your travel dates, it's possible to score a cheap ticket right before your journey.
Is it cheaper to book a CGN to SEA flight and hotel package?
You'll typically save money by booking a CGN to SEA flight and hotel package compared to booking separately. In fact, travelers could save hundreds of dollars by bundling with Expedia. And it's easy to manage it all in one convenient place. After selecting your ideal accommodations and flights, consider other add-ons like car rentals, activities and tours.
Can I cancel or change the date of my flight from Cologne - Bonn Airport (CGN) to Seattle - Tacoma Intl. Airport (SEA)?
Generally, it's possible to cancel or reschedule your CGN to SEA flight. However, if the booking was made more than 24 hours ago, additional fees may apply. Check your airline's policies in your itinerary to see what changes are possible and whether any costs are involved. You'll also find more information on our Customer Service portal.

Travel information

Origin airport
Cologne - Bonn
Destination airport
Seattle - Tacoma Intl.
Airlines serving
Air Canada, British Airways, Lufthansa, Swiss International Air Lines
Roundtrip price
$549
Distance
5009 mi

Book with confidence

Cologne to Seattle Flights

The cheapest times to fly from Cologne 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 Cologne to Seattle are during the month of January. You can find some of the cheapest flights from Cologne to Seattle with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Cologne to Seattle

Sunday is one of the best days to book for cheap flights from Cologne 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 Cologne 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 Cologne to Seattle in 2025. You can also book with separate airlines for your outbound and return journeys, from $373 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 Cologne 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 Cologne 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.

 

Cologne to Seattle Flights

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*Available to One Key members.