Which layover airport has the shortest travel time from St. Louis to Copenhagen?

Flights connecting via Montreal (YUL) have the shortest average one-way travel time: 10h 40m.

Which airport is the most popular layover for flights between St. Louis and Copenhagen?

Atlanta (ATL) was the most common stop: 60% of momondo users choosing 1-stop flights on this route connected there.

Which layover airport offers the lowest fares from St. Louis to Copenhagen?

Flights via London (LHR) offer the lowest average round-trip price of $655.

Which layover airport has the shortest connection time from St. Louis to Copenhagen?

Philadelphia (PHL) has the shortest average layover time for this route: 1h 48m.

What airlines fly to Copenhagen?

American Airlines, United Airlines and Air Canada are the top three most popular airlines that fly to Copenhagen from St. Louis according to our data. American Airlines is the first choice among our users, with 27% of people opting to fly with this airline when traveling to Copenhagen. Keep in mind that there are 8 different airlines that fly to Copenhagen on a routine basis, so you have a few additional options to choose from.

When did momondo last update prices for flights from Lambert-St Louis Airport to Kastrup Copenhagen Airport?

Prices for flights from Lambert-St Louis Airport to Kastrup Copenhagen Airport are refreshed on a daily basis.

How many operators does momondo search for flights from Lambert-St Louis Airport to Kastrup Copenhagen Airport?

As of November 2025, there are 8 operators available to choose from for flights from Lambert-St Louis Airport to Kastrup Copenhagen Airport.

How old do you have to be to fly from Lambert-St Louis Airport to Kastrup Copenhagen 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 Lambert-St Louis Airport to Kastrup Copenhagen Airport.

What documentation or ID do you need to fly to Kastrup Copenhagen Airport?

The travel and health documents required for your trip to Kastrup Copenhagen 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 Kastrup Copenhagen Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

$499 Cheap Flights from St. Louis to Copenhagen in 2025/26

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Cheap round-trip flights

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5:13 pm - 7:50 pmSTL-CPH

19h 37m2 stops

8:10 am - 8:45 pmCPH-STL

19h 35m2 stops

$543Delta

Find Deal

Wed, Dec 24 - Tue, Jan 13

2:07 pm - 2:40 pmSTL-CPH

17h 33m2 stops

6:00 am - 8:47 pmCPH-STL

21h 47m2 stops

$549Delta

Find Deal

Wed, Dec 3 - Sun, Dec 7

5:02 pm - 12:15 pmSTL-CPH

36h 13m2 stops

6:50 am - 9:13 pmCPH-STL

21h 23m2 stops

$562United Airlines

Find Deal

Mon, Dec 29 - Sun, Jan 11

6:35 pm - 11:05 pmSTL-CPH

21h 30m2 stops

12:40 pm - 9:13 pmCPH-STL

39h 33m2 stops

$570United Airlines

Find Deal

Wed, Dec 31 - Sat, Jan 10

6:35 pm - 11:15 pmSTL-CPH

21h 40m2 stops

10:10 am - 1:55 pmCPH-STL

34h 45m1 stop

$578Lufthansa

Find Deal

Mon, Dec 29 - Tue, Jan 13

6:35 pm - 12:15 pmSTL-CPH

34h 40m2 stops

12:40 pm - 10:58 pmCPH-STL

41h 18m2 stops

$582United Airlines

Find Deal

Mon, Dec 29 - Sat, Jan 10

4:05 pm - 6:15 pmSTL-CPH

43h 10m2 stops

12:40 pm - 9:13 pmCPH-STL

39h 33m2 stops

$583United Airlines

Find Deal

Sun, Dec 28 - Sat, Jan 10

3:15 pm - 10:40 amSTL-CPH

12h 25m1 stop

1:15 pm - 11:42 pmCPH-STL

17h 27m1 stop

$592Scandinavian Airlines

Find Deal

Thu, Nov 27 - Thu, Dec 4

6:30 pm - 3:25 pmSTL-CPH

14h 55m2 stops

6:40 am - 1:30 pmCPH-STL

13h 50m1 stop

$711Lufthansa

Find Deal

Sat, Mar 28 - Wed, Apr 1

5:40 pm - 4:55 pmSTL-CPH

16h 15m2 stops

6:25 am - 7:30 pmCPH-STL

20h 05m2 stops

$881American Airlines

Find Deal

Tue, Dec 16 - Tue, Dec 23

Delta flights from St. Louis to Copenhagen

Our best Delta deals on St. Louis to Copenhagen flight tickets

Delta

Dec 24

STL5:13 pmLambert-St Louis

19h 37m

2 stops

CPH7:50 pmKastrup Copenhagen

Jan 13

CPH8:10 amKastrup Copenhagen

19h 35m

2 stops

STL8:45 pmLambert-St Louis

$543

Find similar

Delta

Dec 3

STL2:07 pmLambert-St Louis

17h 33m

2 stops

CPH2:40 pmKastrup Copenhagen

Dec 7

CPH6:00 amKastrup Copenhagen

21h 47m

2 stops

STL8:47 pmLambert-St Louis

$549

Find similar

Delta

Dec 24

STL5:13 pmLambert-St Louis

19h 37m

2 stops

CPH7:50 pmKastrup Copenhagen

Jan 7

CPH6:45 amKastrup Copenhagen

23h 54m

2 stops

STL11:39 pmLambert-St Louis

$640

Find similar

United Airlines flights from St. Louis to Copenhagen

Our best United Airlines deals on St. Louis to Copenhagen flight tickets

United Airlines

Dec 29

STL5:02 pmLambert-St Louis

36h 13m

2 stops

CPH12:15 pmKastrup Copenhagen

Jan 11

CPH6:50 amKastrup Copenhagen

21h 23m

2 stops

STL9:13 pmLambert-St Louis

$562

Find similar

United Airlines

Dec 31

STL6:35 pmLambert-St Louis

21h 30m

2 stops

CPH11:05 pmKastrup Copenhagen

Jan 10

CPH12:40 pmKastrup Copenhagen

39h 33m

2 stops

STL9:13 pmLambert-St Louis

$570

Find similar

United Airlines

Dec 29

STL6:35 pmLambert-St Louis

34h 40m

2 stops

CPH12:15 pmKastrup Copenhagen

Jan 10

CPH12:40 pmKastrup Copenhagen

41h 18m

2 stops

STL10:58 pmLambert-St Louis

$582

Find similar

Fly from

Fly to

Route

Depart

Return

Price

St. LouisCopenhagen

STL - CPH

STLCPH

Lambert-St Louis

Wed 12/24

5:13 pm-7:50 pm

2 stops19h 37m

Kastrup Copenhagen

Tue 1/13

8:10 am-8:45 pm

2 stops19h 35m

$543

St. LouisCopenhagen

STL - CPH

STLCPH

Lambert-St Louis

Wed 12/3

2:07 pm-2:40 pm

2 stops17h 33m

Kastrup Copenhagen

Sun 12/7

6:00 am-8:47 pm

2 stops21h 47m

$549

St. LouisCopenhagen

STL - CPH

STLCPH

Lambert-St Louis

Mon 12/29

5:02 pm-12:15 pm

2 stops36h 13m

Kastrup Copenhagen

Sun 1/11

6:50 am-9:13 pm

2 stops21h 23m

$562

St. LouisCopenhagen

STL - CPH

STLCPH

Lambert-St Louis

Wed 12/31

6:35 pm-11:05 pm

2 stops21h 30m

Kastrup Copenhagen

Sat 1/10

12:40 pm-9:13 pm

2 stops39h 33m

$570

St. LouisCopenhagen

STL - CPH

STLCPH

Lambert-St Louis

Mon 12/29

6:35 pm-11:15 pm

2 stops21h 40m

Kastrup Copenhagen

Tue 1/13

10:10 am-1:55 pm

1 stop34h 45m

$578

St. LouisCopenhagen

STL - CPH

STLCPH

Lambert-St Louis

Mon 12/29

6:35 pm-12:15 pm

2 stops34h 40m

Kastrup Copenhagen

Sat 1/10

12:40 pm-10:58 pm

2 stops41h 18m

$582

St. LouisCopenhagen

STL - CPH

STLCPH

Lambert-St Louis

Sun 12/28

4:05 pm-6:15 pm

2 stops43h 10m

Kastrup Copenhagen

Sat 1/10

12:40 pm-9:13 pm

2 stops39h 33m

$583

St. LouisCopenhagen

STL - CPH

STLCPH

Lambert-St Louis

Thu 11/27

3:15 pm-10:40 am

1 stop12h 25m

Kastrup Copenhagen

Thu 12/4

1:15 pm-11:42 pm

1 stop17h 27m

$592

St. LouisCopenhagen

STL - CPH

STLCPH

Lambert-St Louis

Sat 3/28

6:30 pm-3:25 pm

2 stops14h 55m

Kastrup Copenhagen

Wed 4/1

6:40 am-1:30 pm

1 stop13h 50m

$711

St. LouisCopenhagen

STL - CPH

STLCPH

Lambert-St Louis

Tue 12/16

5:40 pm-4:55 pm

2 stops16h 15m

Kastrup Copenhagen

Tue 12/23

6:25 am-7:30 pm

2 stops20h 05m

$881

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

How to get the cheapest flight ticket from St. Louis to Copenhagen

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

Layovers

What is the cheapest month to fly to Copenhagen?

The cheapest month to fly to Copenhagen from St. Louis is in January. Flight prices, which tend to average around $654, are often lower during this time because this is during the off-season. If you aren’t able to travel to Copenhagen during the month of January, then flying in October is also cheap. Prices for this month can be found on momondo for an average of $715.

What is the cheapest day to depart on your flight to Copenhagen?

The cheapest day to depart from St. Louis to Copenhagen is on a Tuesday when prices can be found for as low as $727. When flying out on a Thursday, the most expensive travel day of the week, you can expect to see flight prices from St. Louis to Copenhagen for around $1,340.

What is the cheapest time of day to depart on your flight to Copenhagen?

Flying to Copenhagen from St. Louis in the morning is the least expensive time of day to depart. momondo users have found prices as low as $839 when looking at flights departing in the morning. Try not to purchase tickets at noon because they tend to be around $1,047. Of course, these prices can vary depending on the time of year and what airport you fly to.

How far in advance should I book a flight to Copenhagen?

You are more likely to see cheaper flights to Copenhagen from St. Louis when booking weeks ahead of your departure date. In general, you can expect to find flights to Copenhagen for around $842 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Copenhagen from St. Louis for as low as $743 on momondo.

Can stopping save me money on St. Louis to Copenhagen flights?

You could potentially save up to 8% on your flight if you consider stops on a St. Louis to Copenhagen flight.

When to book flights from St. Louis to Copenhagen

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

Estimated round-trip price

Cheap St. Louis to Copenhagen (STL to CPH) flight deals and tips

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

Direct flights	None

There are no direct flights from St. Louis to Copenhagen. There are no popular flight routes from St. Louis to Copenhagen.

Search flight deals

How far is Lambert-St Louis to Kastrup Copenhagen by plane?
The straight-line distance from Lambert-St Louis to Kastrup Copenhagen is 4507.7 mi. In terms of flight time, this usually takes a little over 12h 25m.
When did momondo last update prices for flights from Lambert-St Louis Airport to Kastrup Copenhagen Airport?
Prices for flights from Lambert-St Louis Airport to Kastrup Copenhagen Airport are refreshed on a daily basis.
How many operators does momondo search for flights from Lambert-St Louis Airport to Kastrup Copenhagen Airport?
As of November 2025, there are 8 operators available to choose from for flights from Lambert-St Louis Airport to Kastrup Copenhagen Airport.
How old do you have to be to fly from Lambert-St Louis Airport to Kastrup Copenhagen 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 Lambert-St Louis Airport to Kastrup Copenhagen Airport.
What documentation or ID do you need to fly to Kastrup Copenhagen Airport?
The travel and health documents required for your trip to Kastrup Copenhagen 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 Kastrup Copenhagen Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.
What is the most popular airline from St. Louis to Copenhagen?
Based on momondo bookings for flights between St. Louis and Copenhagen, the leading airline is United Airlines, making up 18% of the total bookings. Other popular airlines include American Airlines with 18%, Air Canada with 17%, and Delta with 14%.

Best airlines flying from St. Louis to Copenhagen

Compare and see reviews for airlines that fly from St. Louis to Copenhagen with momondo

Airline	Rating	Free Cancellation	Price
United Airlines	PriceFrom $598	Free Cancellation	Rating 7.4 8,997 reviews	Search United Airlines flights
KLM	PriceFrom $625	Free Cancellation	Rating 7.7 1,405 reviews	Search KLM flights
Delta	PriceFrom $643	Free Cancellation	Rating 7.9 8,002 reviews	Search Delta flights
Scandinavian Airlines	PriceFrom $655	Free Cancellation	Rating 7.4 1,556 reviews	Search Scandinavian Airlines flights
British Airways	PriceFrom $655	Free Cancellation	Rating 6.7 7,494 reviews	Search British Airways flights
Air Canada	PriceFrom $659	Free Cancellation	Rating 7.1 10,398 reviews	Search Air Canada flights
Lufthansa	PriceFrom $690	Free Cancellation	Rating 6.8 7,545 reviews	Search Lufthansa flights
American Airlines	PriceFrom $733	Free Cancellation	Rating 7.2 11,038 reviews	Search American Airlines flights

Kastrup

Roskilde

Why use momondo?

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

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

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

Flights from St. Louis to Copenhagen with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

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

Once all potential St. Louis to Copenhagen flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

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

Yes. momondo can track prices for St. Louis to Copenhagen flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

An easier way to manage your Copenhagen trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

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Cheap flights from St. Louis to Copenhagen from $543

This is the cheapest round-trip flight price found by a momondo user in the last 72 hours by searching for a flight from St. Louis to Copenhagen departing on 12/24. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

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Delta flights from St. Louis to Copenhagen

Our best Delta deals on St. Louis to Copenhagen flight tickets

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Our best United Airlines deals on St. Louis to Copenhagen flight tickets

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How to get the cheapest flight ticket from St. Louis to Copenhagen

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Copenhagen?

What is the cheapest day to depart on your flight to Copenhagen?

The cheapest day to depart from St. Louis to Copenhagen is on a Tuesday when prices can be found for as low as $727. When flying out on a Thursday, the most expensive travel day of the week, you can expect to see flight prices from St. Louis to Copenhagen for around $1,340.

What is the cheapest time of day to depart on your flight to Copenhagen?

How far in advance should I book a flight to Copenhagen?

Can stopping save me money on St. Louis to Copenhagen flights?

You could potentially save up to 8% on your flight if you consider stops on a St. Louis to Copenhagen flight.

What airlines fly to Copenhagen?

Which airport is the most popular layover for flights between St. Louis and Copenhagen?

Atlanta (ATL) was the most common stop: 60% of momondo users choosing 1-stop flights on this route connected there.

Which layover airport offers the lowest fares from St. Louis to Copenhagen?

Flights via London (LHR) offer the lowest average round-trip price of $655.

Which layover airport has the shortest travel time from St. Louis to Copenhagen?

Flights connecting via Montreal (YUL) have the shortest average one-way travel time: 10h 40m.

Which layover airport has the shortest connection time from St. Louis to Copenhagen?

Philadelphia (PHL) has the shortest average layover time for this route: 1h 48m.

When to book flights from St. Louis to Copenhagen

Cheap St. Louis to Copenhagen (STL to CPH) flight deals and tips

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

Direct flights

How far is Lambert-St Louis to Kastrup Copenhagen by plane?

When did momondo last update prices for flights from Lambert-St Louis Airport to Kastrup Copenhagen Airport?

How many operators does momondo search for flights from Lambert-St Louis Airport to Kastrup Copenhagen Airport?

How old do you have to be to fly from Lambert-St Louis Airport to Kastrup Copenhagen Airport?

What documentation or ID do you need to fly to Kastrup Copenhagen Airport?

What is the most popular airline from St. Louis to Copenhagen?

Best airlines flying from St. Louis to Copenhagen

Compare and see reviews for airlines that fly from St. Louis to Copenhagen with momondo

Traveling to a place near Copenhagen?

Why use momondo?

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

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

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

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

An easier way to manage your Copenhagen trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to Denmark

Airports servicing Denmark