$415 Cheap Flights from St. Louis (STL) to Copenhagen (CPH)

View $415 flight on Sun, Oct 19, 2025Opens in a new window

Popular airlines from St. Louis Lambert Intl. Airport (STL) to Copenhagen Airport, Kastrup (CPH)

Cheap Flights from St. Louis to Copenhagen (STL-CPH)

Prices were available within the past 7 days and start at $415 for one-way flights and $576 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Air Canada
Mon, Apr 27 - Thu, May 7
STL
St. Louis
CPH
Copenhagen
$576 Roundtrip, found 4 days ago
$576
Roundtrip
found 4 days ago
Select Air Canada flight, departing Mon, Apr 27 from St. Louis to Copenhagen, returning Thu, May 7, priced at $576 found 4 days ago
United
Wed, Oct 22 - Fri, Nov 21
STL
St. Louis
CPH
Copenhagen
$581 Roundtrip, found 2 days ago
$581
Roundtrip
found 2 days ago
Select United flight, departing Wed, Oct 22 from St. Louis to Copenhagen, returning Fri, Nov 21, priced at $581 found 2 days ago
Delta
Mon, Apr 27 - Thu, May 7
STL
St. Louis
CPH
Copenhagen
$582 Roundtrip, found 4 days ago
$582
Roundtrip
found 4 days ago
Select Delta flight, departing Mon, Apr 27 from St. Louis to Copenhagen, returning Thu, May 7, priced at $582 found 4 days ago
Scandinavian Airlines
Mon, Oct 20 - Tue, Oct 28
STL
St. Louis
CPH
Copenhagen
$586 Roundtrip, found 1 day ago
$586
Roundtrip
found 1 day ago
Select Scandinavian Airlines flight, departing Mon, Oct 20 from St. Louis to Copenhagen, returning Tue, Oct 28, priced at $586 found 1 day ago
Scandinavian Airlines
Sat, Nov 15 - Sat, Nov 22
STL
St. Louis
CPH
Copenhagen
$586 Roundtrip, found 21 hours ago
$586
Roundtrip
found 21 hours ago
Select Scandinavian Airlines flight, departing Sat, Nov 15 from St. Louis to Copenhagen, returning Sat, Nov 22, priced at $586 found 21 hours ago
Scandinavian Airlines
Thu, Jan 29 - Mon, Feb 9
STL
St. Louis
CPH
Copenhagen
$587 Roundtrip, found 3 days ago
$587
Roundtrip
found 3 days ago
Select Scandinavian Airlines flight, departing Thu, Jan 29 from St. Louis to Copenhagen, returning Mon, Feb 9, priced at $587 found 3 days ago
United
Wed, Oct 22 - Tue, Nov 25
STL
St. Louis
CPH
Copenhagen
$591 Roundtrip, found 2 days ago
$591
Roundtrip
found 2 days ago
Select United flight, departing Wed, Oct 22 from St. Louis to Copenhagen, returning Tue, Nov 25, priced at $591 found 2 days ago
British Airways
Wed, Apr 22 - Tue, Apr 28
STL
St. Louis
CPH
Copenhagen
$591 Roundtrip, found 3 days ago
$591
Roundtrip
found 3 days ago
Select British Airways flight, departing Wed, Apr 22 from St. Louis to Copenhagen, returning Tue, Apr 28, priced at $591 found 3 days ago
United
Mon, Apr 27 - Thu, May 7
STL
St. Louis
CPH
Copenhagen
$593 Roundtrip, found 4 days ago
$593
Roundtrip
found 4 days ago
Select United flight, departing Mon, Apr 27 from St. Louis to Copenhagen, returning Thu, May 7, priced at $593 found 4 days ago
United
Mon, Apr 27 - Thu, May 7
STL
St. Louis
CPH
Copenhagen
$594 Roundtrip, found 4 days ago
$594
Roundtrip
found 4 days ago
Select United flight, departing Mon, Apr 27 from St. Louis to Copenhagen, returning Thu, May 7, priced at $594 found 4 days ago

Find the cheapest month to fly from St. Louis (STL) to Copenhagen (CPH)

February is typically the cheapest month to fly

From $558 - $1,362 per traveler.

Frequently asked questions

How much does a flight from Lambert-St. Louis Intl. Airport (STL) to Kastrup Airport (CPH) cost?
Grab a cheap one-way flight from $415 or cheap return flight from $576 from Lambert-St. Louis Intl. Airport (STL) to Kastrup Airport (CPH) 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 Lambert-St. Louis Intl. Airport (STL) to Kastrup Airport (CPH)?
Planning your getaway for April may help you find better deals, as it's the cheapest month for flights between STL and CPH. You'll usually find the lowest fares during off-peak months.
What is the cheapest airline that flies from Lambert-St. Louis Intl. Airport (STL) to Kastrup Airport (CPH)?
Expedia's filter tool lets you easily compare different airlines, departure times and fares all in one place. Select your preferences, then sort by "Price (lowest to highest)" to find the carrier with the cheapest STL to CPH flight.
How many flights per day from Lambert-St. Louis Intl. Airport (STL) to Kastrup Airport (CPH)?
Nonstop flights from Lambert-St. Louis Intl. Airport (STL) to Kastrup Airport (CPH) aren't available daily, so you'll need to take a flight with a layover. Explore your options with Expedia's filters. Enter your travel details and select either "1 Stop" or "2+ Stops."
What day of the week has the most flights from STL to CPH?
You'll usually find Tuesday the quietest day for flights, while Fridays tend to be the busiest.* However this can vary from season to season and during public holidays or peak travel times.*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 Kastrup Airport (CPH)?
To avoid possible delays on the Lambert-St. Louis Intl. Airport (STL) to Kastrup Airport (CPH) route, aim to fly before 3 PM. Later flights have a 22% higher chance of being canceled.**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 Kastrup Airport (CPH) last-minute?
Booking your plane ticket from STL to CPH shortly before your journey is typically more expensive. However, if you're flexible with your travel dates and times, you could snag a cheap last-minute fare.
Is it cheaper to book a STL to CPH flight and hotel package?
Booking a STL to CPH flight and hotel package is usually cheaper than booking separately. With Expedia, you can enjoy the convenience of organizing your travels all in one place. Choose from our impressive range of hotels and then add flights, activities and car rentals to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Lambert-St. Louis Intl. Airport (STL) to Kastrup Airport (CPH)?
Usually, it's possible to cancel or reschedule your STL to CPH flight. However, if it's been more than 24 hours since booking, 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 more details on our Customer Service portal.

Travel information

Travel information

Origin airport
Lambert-St. Louis Intl.
Destination airport
Kastrup
Airlines serving
Air Canada, Air France, American Airlines, Austrian Airlines, British Airways, Brussels Airlines, Delta, Finnair, Iberia, KLM, Lufthansa, Scandinavian Airlines, United, Virgin Atlantic
Roundtrip price
$576
Distance
4513 mi

Book with confidence

Book with confidence

St. Louis to Copenhagen Flights

The cheapest times to fly from St. Louis to Copenhagen

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

 

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

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

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 Copenhagen in 2025. You can also book with separate airlines for your outbound and return journeys, from $415 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 Copenhagen 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 Copenhagen 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 Copenhagen Flights

Explore a world of travel with Expedia

Explore a world of travel with Expedia

*Available to One Key members.