$442 Cheap Flights from St. Louis (STL) to Cologne (CGN)

View $442 flight on Tue, Nov 11, 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 $442 for one-way flights and $571 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

British Airways
Mon, Feb 23 - Mon, Mar 2
STL
St. Louis
CGN
Cologne
$571 Roundtrip, found 1 day ago
$571
Roundtrip
found 1 day ago
Select British Airways flight, departing Mon, Feb 23 from St. Louis to Cologne, returning Mon, Mar 2, priced at $571 found 1 day ago
British Airways
Sun, Dec 7 - Wed, Dec 24
STL
St. Louis
CGN
Cologne
$576 Roundtrip, found 1 day ago
$576
Roundtrip
found 1 day ago
Select British Airways flight, departing Sun, Dec 7 from St. Louis to Cologne, returning Wed, Dec 24, priced at $576 found 1 day ago
British Airways
Tue, Dec 2 - Tue, Dec 9
STL
St. Louis
CGN
Cologne
$576 Roundtrip, found 4 days ago
$576
Roundtrip
found 4 days ago
Select British Airways flight, departing Tue, Dec 2 from St. Louis to Cologne, returning Tue, Dec 9, priced at $576 found 4 days ago
British Airways
Sun, Feb 1 - Sun, Feb 8
STL
St. Louis
CGN
Cologne
$593 Roundtrip, found 1 day ago
$593
Roundtrip
found 1 day ago
Select British Airways flight, departing Sun, Feb 1 from St. Louis to Cologne, returning Sun, Feb 8, priced at $593 found 1 day ago
British Airways
Sun, Feb 1 - Sun, Feb 8
STL
St. Louis
CGN
Cologne
$598 Roundtrip, found 1 day ago
$598
Roundtrip
found 1 day ago
Select British Airways flight, departing Sun, Feb 1 from St. Louis to Cologne, returning Sun, Feb 8, priced at $598 found 1 day ago
British Airways
Mon, Feb 23 - Sun, Mar 1
STL
St. Louis
CGN
Cologne
$598 Roundtrip, found 1 day ago
$598
Roundtrip
found 1 day ago
Select British Airways flight, departing Mon, Feb 23 from St. Louis to Cologne, returning Sun, Mar 1, priced at $598 found 1 day ago
Air Canada
Sun, Feb 1 - Sun, Feb 8
STL
St. Louis
CGN
Cologne
$626 Roundtrip, found 1 day ago
$626
Roundtrip
found 1 day ago
Select Air Canada flight, departing Sun, Feb 1 from St. Louis to Cologne, returning Sun, Feb 8, priced at $626 found 1 day ago
Lufthansa
Sat, Dec 6 - Sat, Dec 13
STL
St. Louis
CGN
Cologne
$632 Roundtrip, found 1 day ago
$632
Roundtrip
found 1 day ago
Select Lufthansa flight, departing Sat, Dec 6 from St. Louis to Cologne, returning Sat, Dec 13, priced at $632 found 1 day ago
United
Sun, Feb 1 - Sun, Feb 8
STL
St. Louis
CGN
Cologne
$633 Roundtrip, found 1 day ago
$633
Roundtrip
found 1 day ago
Select United flight, departing Sun, Feb 1 from St. Louis to Cologne, returning Sun, Feb 8, priced at $633 found 1 day ago
American Airlines
Sun, Feb 1 - Sun, Feb 8
STL
St. Louis
CGN
Cologne
$649 Roundtrip, found 1 day ago
$649
Roundtrip
found 1 day ago
Select American Airlines flight, departing Sun, Feb 1 from St. Louis to Cologne, returning Sun, Feb 8, priced at $649 found 1 day 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 $721
CGN
Cologne - Bonn
CheapestClosest
Average driving time to city center14 min
Flights from $721

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 $442 or cheap return flight from $571 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)?
February 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

Origin airport
Lambert-St. Louis Intl.
Destination airport
Cologne - Bonn
Airlines serving
Air Canada, Austrian Airlines, British Airways, Lufthansa, United
Roundtrip price
$570
Distance
4495 mi

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 February. 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 $442 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.