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Cheap flights from Cologne to St. Louis from $810

This is the cheapest round-trip flight price found by a momondo user in the last 72 hours by searching for a flight from Cologne to St. Louis departing on 8/3. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

Find the cheapest flights from Cologne to St. Louis

Cheap round-trip flights

Enter your travel dates to find the best prices.
United Airlines Logo
1:05 pm - 3:46 pm
CGN
-
STL
33h 41m
2 stops
United Airlines Logo
5:30 pm - 5:20 pm
STL
-
CGN
16h 50m
2 stops
$810United Airlines
Mon, Aug 3 - Sun, Aug 23
Multiple Airlines Logo
6:30 am - 11:44 pm
CGN
-
STL
24h 14m
3 stops
Multiple Airlines Logo
1:13 pm - 5:20 pm
STL
-
CGN
21h 07m
3 stops
$1,468Multiple Airlines
Fri, Jul 10 - Tue, Jul 14
Multiple Airlines Logo
8:40 pm - 11:44 pm
CGN
-
STL
34h 04m
2 stops
Multiple Airlines Logo
12:10 pm - 12:25 pm
STL
-
CGN
17h 15m
2 stops
$1,509Multiple Airlines
Fri, Jul 10 - Tue, Jul 14
Air Canada Logo
8:30 am - 9:26 pm
CGN
-
STL
19h 56m
3 stops
Air Canada Logo
1:13 pm - 12:25 pm
STL
-
CGN
16h 12m
2 stops
$1,639Air Canada
Fri, Jul 10 - Tue, Jul 14
Multiple Airlines Logo
1:05 pm - 2:04 pm
CGN
-
STL
31h 59m
3 stops
Multiple Airlines Logo
12:10 pm - 12:25 pm
STL
-
CGN
17h 15m
2 stops
$2,289Multiple Airlines
Mon, Aug 3 - Sun, Aug 23

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Customize your flight search to find flights from Cologne to St. Louis that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated June 28, 2026.
Use the filters below to find and compare flights from Cologne to St. Louis that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

CologneSt. Louis

CGN - STL

CGNSTL

Cologne Köln/Bonn

Mon 8/3

1:05 pm-3:46 pm

2 stops33h 41m

Lambert-St Louis

Sun 8/23

5:30 pm-5:20 pm

2 stops16h 50m

$810

CologneSt. Louis

CGN - STL

CGNSTL

Cologne Köln/Bonn

Fri 7/10

6:30 am-11:44 pm

3 stops24h 14m

Lambert-St Louis

Tue 7/14

1:13 pm-5:20 pm

3 stops21h 07m

$1,468

CologneSt. Louis

CGN - STL

CGNSTL

Cologne Köln/Bonn

Fri 7/10

8:40 pm-11:44 pm

2 stops34h 04m

Lambert-St Louis

Tue 7/14

12:10 pm-12:25 pm

2 stops17h 15m

$1,509
Quickest round-trip

CologneSt. Louis

CGN - STL

CGNSTL

Cologne Köln/Bonn

Fri 7/10

8:30 am-9:26 pm

3 stops19h 56m

Lambert-St Louis

Tue 7/14

1:13 pm-12:25 pm

2 stops16h 12m

$1,639

CologneSt. Louis

CGN - STL

CGNSTL

Cologne Köln/Bonn

Mon 8/3

1:05 pm-2:04 pm

3 stops31h 59m

Lambert-St Louis

Sun 8/23

12:10 pm-12:25 pm

2 stops17h 15m

$2,289

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

When to book flights from Cologne to St. Louis

Are you open to changing your travel dates? Check out the ideal times to fly from Cologne to St. Louis according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Cologne to St. Louis (CGN to STL) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Cologne to St. Louis

Fastest flight time

17h 27m

Direct flights

None
The fastest flight from Cologne to St. Louis takes 17h 27m
There are no direct flights from Cologne to St. Louis. There are no popular flight routes from Cologne to St. Louis.
Search flight deals

Frequently asked questions about flying from Cologne to St. Louis

  • How far is Cologne Köln/Bonn to Lambert-St Louis by plane?

    The straight-line distance from Cologne Köln/Bonn to Lambert-St Louis is 4484.3 mi. A reasonable flight in good conditions will take 17h 27m.

  • When did momondo last update prices for flights from Cologne Köln/Bonn Airport to Lambert-St Louis Airport?

    Prices for flights from Cologne Köln/Bonn Airport to Lambert-St Louis Airport were last updated today.

  • How old do you have to be to fly from Cologne Köln/Bonn Airport to Lambert-St Louis Airport?

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Cologne Köln/Bonn Airport to Lambert-St Louis Airport.

  • What documentation or ID do you need to fly to Lambert-St Louis Airport?

    The travel and health documents required for your trip to Lambert-St Louis Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Lambert-St Louis Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Frequently asked questions about flying from Cologne to St. Louis

  • How do I get Price Alerts for flights from Cologne to St. Louis?

    Price Alerts will notify you by email when the price for flights to St. Louis from Cologne decreases. To activate this, select your desired travel dates and search for offers. While browsing through offers you’ll see the Price Alert widget toggle. Click it to turn on notifications.

  • How can I save money on flights from Cologne to St. Louis with momondo?

    By using tools like our “Price Calendar”, you can see the best day to fly round-trip for your travels. Our “Price Forecast” tool uses AI to predict whether you should purchase or hold off on booking for potentially cheaper prices. Explore shows you all flight options from a city or airport to build your own unique adventure. The Discover blog also provides valuable insights for saving money while booking your experience. After searching you can toggle on “Price Alerts” to track prices for your desired flight and book at the ideal moment.

  • How does momondo find its flight prices?

    We aggregate our prices from over 700+ competitors from airlines to OTAs. We operate in over 30 markets worldwide to show you a wide range of travel options.

Traveling to a place near St. Louis?

Book flights to St. Louis if you plan to visit one of these locations
St. Charles
Chesterfield
Fairview Heights
Hermann
Maryland Heights
Florissant
O'Fallon
Collinsville
St. Peters
Alton
Wentzville
Farmington
Fenton
Clayton
Festus
Eureka
Litchfield
Edwardsville
Grafton
Shrewsbury

Why use momondo?

Why should I use momondo to find a flight deal from Cologne to St. Louis?

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Cologne to St. Louis. Millions of users trust and use momondo every year so you are in good hands.

Can I find flights from Cologne to St. Louis with flexible booking policies on momondo?

All flight searches from Cologne to St. Louis on momondo can be filtered to show those which offer flexible booking policies.

How can momondo help me find flights from Cologne to St. Louis?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to St. Louis from Cologne.

I’m not ready to book a flight from Cologne to St. Louis right now. Can momondo alert me if prices change?

Price alerts on flights to St. Louis from Cologne are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

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