$462 Cheap Flights from St. Louis (STL) to Cologne (CGN)

View $462 flight on Wed, Mar 18, 2026Opens 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 $462 for one-way flights and $705 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

British Airways
Tue, Mar 3 - Tue, Mar 17
STL
St. Louis
CGN
Cologne
$705 Roundtrip, found 4 days ago
$705
Roundtrip
found 4 days ago
Select British Airways flight, departing Tue, Mar 3 from St. Louis to Cologne, returning Tue, Mar 17, priced at $705 found 4 days ago
British Airways
Tue, Mar 3 - Tue, Mar 17
STL
St. Louis
CGN
Cologne
$711 Roundtrip, found 4 days ago
$711
Roundtrip
found 4 days ago
Select British Airways flight, departing Tue, Mar 3 from St. Louis to Cologne, returning Tue, Mar 17, priced at $711 found 4 days ago
British Airways
Fri, Oct 31 - Thu, Nov 13
STL
St. Louis
CGN
Cologne
$755 Roundtrip, found 6 days ago
$755
Roundtrip
found 6 days ago
Select British Airways flight, departing Fri, Oct 31 from St. Louis to Cologne, returning Thu, Nov 13, priced at $755 found 6 days ago
British Airways
Fri, Apr 3 - Thu, Apr 9
STL
St. Louis
CGN
Cologne
$756 Roundtrip, found 3 days ago
$756
Roundtrip
found 3 days ago
Select British Airways flight, departing Fri, Apr 3 from St. Louis to Cologne, returning Thu, Apr 9, priced at $756 found 3 days ago
British Airways
Fri, Oct 31 - Thu, Nov 13
STL
St. Louis
CGN
Cologne
$783 Roundtrip, found 6 days ago
$783
Roundtrip
found 6 days ago
Select British Airways flight, departing Fri, Oct 31 from St. Louis to Cologne, returning Thu, Nov 13, priced at $783 found 6 days ago
British Airways
Tue, Mar 3 - Tue, Mar 17
STL
St. Louis
CGN
Cologne
$785 Roundtrip, found 4 days ago
$785
Roundtrip
found 4 days ago
Select British Airways flight, departing Tue, Mar 3 from St. Louis to Cologne, returning Tue, Mar 17, priced at $785 found 4 days ago
United
Tue, Mar 3 - Tue, Mar 17
STL
St. Louis
CGN
Cologne
$878 Roundtrip, found 4 days ago
$878
Roundtrip
found 4 days ago
Select United flight, departing Tue, Mar 3 from St. Louis to Cologne, returning Tue, Mar 17, priced at $878 found 4 days ago
Lufthansa
Tue, Mar 3 - Tue, Mar 17
STL
St. Louis
CGN
Cologne
$902 Roundtrip, found 4 days ago
$902
Roundtrip
found 4 days ago
Select Lufthansa flight, departing Tue, Mar 3 from St. Louis to Cologne, returning Tue, Mar 17, priced at $902 found 4 days ago
American Airlines
Tue, Mar 3 - Tue, Mar 17
STL
St. Louis
CGN
Cologne
$904 Roundtrip, found 4 days ago
$904
Roundtrip
found 4 days ago
Select American Airlines flight, departing Tue, Mar 3 from St. Louis to Cologne, returning Tue, Mar 17, priced at $904 found 4 days ago
Air Canada
Fri, Oct 31 - Thu, Nov 13
STL
St. Louis
CGN
Cologne
$922 Roundtrip, found 6 days ago
$922
Roundtrip
found 6 days ago
Select Air Canada flight, departing Fri, Oct 31 from St. Louis to Cologne, returning Thu, Nov 13, priced at $922 found 6 days ago
Flights from St. Louis (STL) to Cologne (CGN)
Origin airport
Lambert-St. Louis Intl.
Destination airport
Cologne - Bonn
Airlines serving
American Airlines, British Airways, Lufthansa, United
Roundtrip price
$705
Distance
4495 mi

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 March. 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 $462 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.

 

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 $462 or cheap return flight from $705 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)?
March 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.

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*Available to One Key members.