$384 Cheap Flights from Cologne (CGN) to St. Louis (STL)

View $384 flight on Fri, May 8, 2026Opens in a new window

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

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

Prices were available within the past 7 days and start at $384 for one-way flights and for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Frequently asked questions

How much does a flight from Cologne - Bonn Airport (CGN) to Lambert-St. Louis Intl. Airport (STL) cost?
Grab a cheap one-way flight from $384 or cheap return flight from Cologne - Bonn Airport (CGN) to Lambert-St. Louis Intl. Airport (STL) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight deals on this route.
What is the cheapest month to fly from Cologne - Bonn Airport (CGN) to Lambert-St. Louis Intl. Airport (STL)?
is the cheapest month to fly from CGN to STL. Timing your trip outside of the busy season is often the key to finding a great deal.
What is the cheapest airline that flies from Cologne - Bonn Airport (CGN) to Lambert-St. Louis Intl. Airport (STL)?
To find the cheapest airline flying from CGN to STL, use Expedia's filter tool. Customize your search based on what's important to you, such as preferred carriers and ideal departure window. You can then sort your results by "Price (lowest to highest)" to see the cheapest flights first.
How many flights per day from Cologne - Bonn Airport (CGN) to Lambert-St. Louis Intl. Airport (STL)?
You'll need to catch a flight with a layover if you're traveling from Cologne - Bonn Airport (CGN) to Lambert-St. Louis Intl. Airport (STL). There are no daily direct flights on this route. However, just filter your search to include one or two stops to discover the best option for your trip.
What day of the week has the most flights from CGN to STL?
Friday is typically the busiest day for flights, while Tuesday tends to be the quietest.* Just remember that flight schedules can change depending on a number of factors, including the time of year and airline.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Cologne - Bonn Airport (CGN) to Lambert-St. Louis Intl. Airport (STL)?
To arrive at Lambert-St. Louis Intl. Airport (STL) without delays, choose a flight that takes off from Cologne - Bonn Airport (CGN) before 3 PM. The chance 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 Cologne - Bonn Airport (CGN) to Lambert-St. Louis Intl. Airport (STL) last-minute?
Holding off until just before your departure to book a flight from CGN to STL generally means paying more. Although you may find some last-minute offers, there's no guarantee. Allow some flexibility in your schedule for the best chance of getting a bargain.
Is it cheaper to book a CGN to STL flight and hotel package?
You can save money by securing a CGN to STL flight and hotel package compared to booking separately. In fact, travelers could save hundreds of dollars by bundling with Expedia. And it's easy to manage everything in one place. Once you've selected your ideal flights and accommodations, consider adding extras like activities, tours and car rentals.
Can I cancel or change the date of my flight from Cologne - Bonn Airport (CGN) to Lambert-St. Louis Intl. Airport (STL)?
Typically, you're able to cancel or reschedule your CGN to STL flight. However, there may be additional fees, especially if you booked more than 24 hours ago. Check your itinerary for the airline's fees and guidelines on flight changes, or if you'd like more information, visit our Customer Service portal.

Travel information

Origin airport
Cologne - Bonn
Destination airport
Lambert-St. Louis Intl.
Distance
4495 mi

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Cologne to St. Louis Flights

The cheapest times to fly from Cologne to St. Louis

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

 

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

Sunday is one of the best days to book for cheap flights from Cologne to St. Louis: 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 Cologne to St. Louis

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 Cologne to St. Louis in 2025. You can also book with separate airlines for your outbound and return journeys, from $384 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 Cologne to St. Louis 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 Cologne to St. Louis 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.

 

Cologne to St. Louis Flights

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