$452 Cheap Flights from St. Louis (STL) to Cologne (CGN)

View $452 flight on Tue, Nov 4, 2025Opens in a new window

Popular airlines from St. Louis Lambert Intl. Airport (STL) to Cologne - Bonn Airport (CGN)

Cheap Flights from St. Louis to Cologne (STL-CGN)

Prices were available within the past 7 days and start at $452 for one-way flights and $629 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Air Canada
Wed, Dec 3 - Tue, Dec 16
STL
St. Louis
CGN
Cologne
$629 Roundtrip, found 5 hours ago
$629
Roundtrip
found 5 hours ago
Select Air Canada flight, departing Wed, Dec 3 from St. Louis to Cologne, returning Tue, Dec 16, priced at $629 found 5 hours ago
Air Canada
Wed, Feb 11 - Fri, Feb 27
STL
St. Louis
CGN
Cologne
$630 Roundtrip, found 23 hours ago
$630
Roundtrip
found 23 hours ago
Select Air Canada flight, departing Wed, Feb 11 from St. Louis to Cologne, returning Fri, Feb 27, priced at $630 found 23 hours ago
Air Canada
Wed, Feb 11 - Wed, Feb 25
STL
St. Louis
CGN
Cologne
$632 Roundtrip, found 23 hours ago
$632
Roundtrip
found 23 hours ago
Select Air Canada flight, departing Wed, Feb 11 from St. Louis to Cologne, returning Wed, Feb 25, priced at $632 found 23 hours ago
Air Canada
Mon, Jan 12 - Tue, Jan 27
STL
St. Louis
CGN
Cologne
$632 Roundtrip, found 5 hours ago
$632
Roundtrip
found 5 hours ago
Select Air Canada flight, departing Mon, Jan 12 from St. Louis to Cologne, returning Tue, Jan 27, priced at $632 found 5 hours ago
United
Tue, Jan 6 - Mon, Jan 26
STL
St. Louis
CGN
Cologne
$634 Roundtrip, found 5 hours ago
$634
Roundtrip
found 5 hours ago
Select United flight, departing Tue, Jan 6 from St. Louis to Cologne, returning Mon, Jan 26, priced at $634 found 5 hours ago
United
Tue, Dec 2 - Sun, Dec 14
STL
St. Louis
CGN
Cologne
$636 Roundtrip, found 2 days ago
$636
Roundtrip
found 2 days ago
Select United flight, departing Tue, Dec 2 from St. Louis to Cologne, returning Sun, Dec 14, priced at $636 found 2 days ago
United
Wed, Feb 4 - Mon, Feb 16
STL
St. Louis
CGN
Cologne
$638 Roundtrip, found 23 hours ago
$638
Roundtrip
found 23 hours ago
Select United flight, departing Wed, Feb 4 from St. Louis to Cologne, returning Mon, Feb 16, priced at $638 found 23 hours ago
British Airways
Thu, Jan 8 - Mon, Jan 26
STL
St. Louis
CGN
Cologne
$670 Roundtrip, found 1 day ago
$670
Roundtrip
found 1 day ago
Select British Airways flight, departing Thu, Jan 8 from St. Louis to Cologne, returning Mon, Jan 26, priced at $670 found 1 day ago
Lufthansa
Sat, Dec 6 - Sun, Dec 14
STL
St. Louis
CGN
Cologne
$746 Roundtrip, found 17 hours ago
$746
Roundtrip
found 17 hours ago
Select Lufthansa flight, departing Sat, Dec 6 from St. Louis to Cologne, returning Sun, Dec 14, priced at $746 found 17 hours ago
American Airlines
Sun, Nov 30 - Wed, Dec 10
STL
St. Louis
CGN
Cologne
$866 Roundtrip, found 6 days ago
$866
Roundtrip
found 6 days ago
Select American Airlines flight, departing Sun, Nov 30 from St. Louis to Cologne, returning Wed, Dec 10, priced at $866 found 6 days 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 $1,446
CGN
Cologne - Bonn
CheapestClosest
Average driving time to city center14 min
Flights from $1,446

Frequently asked questions

How much does a flight from Lambert-St. Louis Intl. Airport (STL) to Cologne - Bonn Airport (CGN) cost?
Grab a cheap one-way flight from $452 or cheap return flight from $629 from Lambert-St. Louis Intl. Airport (STL) to Cologne - Bonn Airport (CGN) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight offers on this route.
What is the cheapest month to fly from Lambert-St. Louis Intl. Airport (STL) to Cologne - Bonn Airport (CGN)?
December is the cheapest month to fly from STL to CGN. Traveling during an off-peak travel window is often the key to finding better fares.
What is the cheapest airline that flies from Lambert-St. Louis Intl. Airport (STL) to Cologne - Bonn Airport (CGN)?
Expedia's filter tool lets you easily compare different airlines, departure times and fares all in one place. Choose your preferences, then sort by "Price (lowest to highest)" to find out which carrier offers the cheapest STL to CGN flight.
How many flights per day from Lambert-St. Louis Intl. Airport (STL) to Cologne - Bonn Airport (CGN)?
Nonstop flights from Lambert-St. Louis Intl. Airport (STL) to Cologne - Bonn Airport (CGN) aren't available daily, so you'll have to take a flight with a layover. Explore your options with Expedia's filter tool. Enter your dates and click on either "1 Stop" or "2+ Stops."
What day of the week has the most flights from STL to CGN?
Friday is generally the busiest day for flights, while Tuesday tends to be the quietest.* Just remember that flight schedules can change depending on various factors, such as the airline and season.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Lambert-St. Louis Intl. Airport (STL) to Cologne - Bonn Airport (CGN)?
To arrive at Cologne - Bonn Airport (CGN) without delays, choose a flight that leaves from Lambert-St. Louis Intl. Airport (STL) 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 Lambert-St. Louis Intl. Airport (STL) to Cologne - Bonn Airport (CGN) last-minute?
Holding off until right before your break to book your flight from STL to CGN generally means paying more. While it's possible to find some last-minute deals, they're not always guaranteed. Be flexible with your itinerary for the best chance of scoring a bargain.
Is it cheaper to book a STL to CGN flight and hotel package?
Compared with arranging hotels and flights separately, booking a STL to CGN flight and hotel package with Expedia could lead to significant savings. What's more, having everything in one convenient place will take the stress out of travel planning. Just pick your flights and choose from our wide range of hotels, then customize your trip with other add-ons like tours and car rentals.
Can I cancel or change the date of my flight from Lambert-St. Louis Intl. Airport (STL) to Cologne - Bonn Airport (CGN)?
Usually, it's possible to reschedule or cancel your STL to CGN flight. However, for bookings made more than 24 hours ago, additional charges may apply. Refer to your airline's policies in your itinerary to see what changes are possible and if any costs are involved. You'll also find further details on our Customer Service portal.

Travel information

Travel information

Origin airport
Lambert-St. Louis Intl.
Destination airport
Cologne - Bonn
Airlines serving
Air Canada, American Airlines, Austrian Airlines, British Airways, Lufthansa, Turkish Airlines, United
Roundtrip price
$628
Distance
4495 mi

Book with confidence

Book with confidence

St. Louis to Cologne Flights

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

 

The best time to book a flight from St. Louis to Cologne

Sunday is one of the best days to book for cheap flights from St. Louis 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 St. Louis 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 St. Louis to Cologne in 2025. You can also book with separate airlines for your outbound and return journeys, from $452 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 St. Louis 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 St. Louis 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.

 

St. Louis to Cologne Flights

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*Available to One Key members.