$398 Cheap Flights from Seattle (SEA) to Cologne (CGN)

View $398 flight on Sun, Nov 16, 2025Opens in a new window

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

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Cheap Flights from Seattle to Cologne (SEA-CGN)

Prices were available within the past 7 days and start at $398 for one-way flights and $538 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

British Airways
Tue, Dec 2 - Tue, Dec 9
SEA
Seattle
CGN
Cologne
$538 Roundtrip, found 2 hours ago
$538
Roundtrip
found 2 hours ago
Select British Airways flight, departing Tue, Dec 2 from Seattle to Cologne, returning Tue, Dec 9, priced at $538 found 2 hours ago
British Airways
Sun, Jan 11 - Mon, Jan 19
SEA
Seattle
CGN
Cologne
$555 Roundtrip, found 4 hours ago
$555
Roundtrip
found 4 hours ago
Select British Airways flight, departing Sun, Jan 11 from Seattle to Cologne, returning Mon, Jan 19, priced at $555 found 4 hours ago
Air Canada
Sun, Nov 9 - Tue, Nov 18
SEA
Seattle
CGN
Cologne
$570 Roundtrip, found 3 days ago
$570
Roundtrip
found 3 days ago
Select Air Canada flight, departing Sun, Nov 9 from Seattle to Cologne, returning Tue, Nov 18, priced at $570 found 3 days ago
Lufthansa
Wed, Nov 26 - Wed, Dec 3
SEA
Seattle
CGN
Cologne
$571 Roundtrip, found 1 day ago
$571
Roundtrip
found 1 day ago
Select Lufthansa flight, departing Wed, Nov 26 from Seattle to Cologne, returning Wed, Dec 3, priced at $571 found 1 day ago
Air Canada
Tue, Dec 2 - Tue, Dec 9
SEA
Seattle
CGN
Cologne
$571 Roundtrip, found 2 hours ago
$571
Roundtrip
found 2 hours ago
Select Air Canada flight, departing Tue, Dec 2 from Seattle to Cologne, returning Tue, Dec 9, priced at $571 found 2 hours ago
Air Canada
Sun, Nov 16 - Tue, Nov 25
SEA
Seattle
CGN
Cologne
$573 Roundtrip, found 7 hours ago
$573
Roundtrip
found 7 hours ago
Select Air Canada flight, departing Sun, Nov 16 from Seattle to Cologne, returning Tue, Nov 25, priced at $573 found 7 hours ago
Air Canada
Tue, Dec 2 - Tue, Dec 9
SEA
Seattle
CGN
Cologne
$575 Roundtrip, found 2 hours ago
$575
Roundtrip
found 2 hours ago
Select Air Canada flight, departing Tue, Dec 2 from Seattle to Cologne, returning Tue, Dec 9, priced at $575 found 2 hours ago
Air Canada
Wed, Dec 3 - Thu, Dec 11
SEA
Seattle
CGN
Cologne
$577 Roundtrip, found 4 days ago
$577
Roundtrip
found 4 days ago
Select Air Canada flight, departing Wed, Dec 3 from Seattle to Cologne, returning Thu, Dec 11, priced at $577 found 4 days ago
Austrian Airlines
Mon, Apr 20 - Mon, May 4
SEA
Seattle
CGN
Cologne
$724 Roundtrip, just found
$724
Roundtrip
just found
Select Austrian Airlines flight, departing Mon, Apr 20 from Seattle to Cologne, returning Mon, May 4, priced at $724 just found
American Airlines
Tue, Dec 2 - Tue, Dec 9
SEA
Seattle
CGN
Cologne
$725 Roundtrip, found 2 hours ago
$725
Roundtrip
found 2 hours ago
Select American Airlines flight, departing Tue, Dec 2 from Seattle to Cologne, returning Tue, Dec 9, priced at $725 found 2 hours ago

Alternative airports near Cologne

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Cologne - Bonn CGN. Cheapest and Closest option available. Average driving time to city center is 14 minutes. Flights from $560
CGN
Cologne - Bonn
CheapestClosest
Average driving time to city center14 min
Flights from $560

Frequently asked questions

How much does a flight from Seattle - Tacoma Intl. Airport (SEA) to Cologne - Bonn Airport (CGN) cost?
Grab a cheap one-way flight from $398 or cheap return flight from $538 from Seattle - Tacoma Intl. Airport (SEA) to Cologne - Bonn Airport (CGN) 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 Seattle - Tacoma Intl. Airport (SEA) to Cologne - Bonn Airport (CGN)?
Flying in December is a great way to save, as it's the cheapest month for flights between SEA and CGN. You'll often find the lowest fares during off-peak months.
What is the cheapest airline that flies from Seattle - Tacoma Intl. Airport (SEA) to Cologne - Bonn Airport (CGN)?
Use the filter tool on Expedia to compare airlines and find the cheapest carrier that'll take you from SEA to CGN. Then, sort your results by "Price (lowest to highest)" to pick up a good deal.
How many flights per day from Seattle - Tacoma Intl. Airport (SEA) to Cologne - Bonn Airport (CGN)?
You'll need to catch a flight with a layover if you're traveling from Seattle - Tacoma Intl. Airport (SEA) to Cologne - Bonn Airport (CGN). Direct flights don't operate daily on this route. However, just filter your search to include one or more stops to find an option that works for you.
What day of the week has the most flights from SEA to CGN?
Friday is typically the busiest day for flights, while Tuesday tends to be the quietest.* Keep in mind that flight schedules can vary based on a range of factors, such as the time of year and carrier.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Seattle - Tacoma Intl. Airport (SEA) to Cologne - Bonn Airport (CGN)?
To touch down at Cologne - Bonn Airport (CGN) on schedule, book a flight that leaves from Seattle - Tacoma Intl. Airport (SEA) before 3 PM. The likelihood of cancellations is 22% higher, on average, for departures after this hour.**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 Seattle - Tacoma Intl. Airport (SEA) to Cologne - Bonn Airport (CGN) last-minute?
Booking your flight from SEA to CGN just before your journey is usually more expensive. However, if you're flexible with your departure times and dates, you could snag a cheap last-minute fare.
Is it cheaper to book a SEA to CGN flight and hotel package?
You can save money by securing a SEA to CGN flight and hotel package compared to booking separately. In fact, travelers could save hundreds of dollars by bundling with Expedia. And it's simple to manage it all in one convenient place. After choosing your preferred flights and accommodations, you can add extras such as car rentals, activities and tours.
Can I cancel or change the date of my flight from Seattle - Tacoma Intl. Airport (SEA) to Cologne - Bonn Airport (CGN)?
Typically, you can modify or cancel your SEA to CGN flight. However, there may be additional charges, especially if you booked over 24 hours ago. Check your itinerary for the airline's fees and policies on flight changes, or if you need more information, head to our Customer Service portal.

Travel information

Origin airport
Seattle - Tacoma Intl.
Destination airport
Cologne - Bonn
Airlines serving
Air Canada, American Airlines, Austrian Airlines, British Airways, Lufthansa, Swiss International Air Lines, Turkish Airlines, United
Roundtrip price
$537
Distance
5009 mi

Book with confidence

Seattle to Cologne Flights

The cheapest times to fly from Seattle to Cologne

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

 

The best time to book a flight from Seattle to Cologne

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

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 Seattle to Cologne in 2025. You can also book with separate airlines for your outbound and return journeys, from $398 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 Seattle to Cologne 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 Seattle to Cologne 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.

 

Seattle to Cologne Flights

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*Available to One Key members.