What is the cheapest airline that flies from Lambert-St Louis to Kastrup Copenhagen?

Delta is the most popular carrier operating from Lambert-St Louis to Kastrup Copenhagen

What airlines fly to Copenhagen?

Air Canada, American Airlines and United Airlines are the top three most popular airlines that fly to Copenhagen from St. Louis according to our data. Air Canada is the first choice among our users, with 29% 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.

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

Atlanta (ATL) was the most common stop: 62% 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 Philadelphia (PHL) offer the lowest average round-trip price of $972.

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.

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.

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 September 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.

$323 Cheap Flights from St. Louis to Copenhagen (STL-CPH) in 2025

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Find the cheapest flights from St. Louis to Copenhagen (STL-CPH)

Round-trip

One-way

Last minute

Cheap round-trip flights

1:55 pm - 10:40 amSTL-CPH

13h 45m1 stop

1:15 pm - 9:03 pmCPH-STL

14h 48m1 stop

$589Scandinavian Airlines

Find Deal

Mon, Dec 1 - Thu, Dec 4

1:20 pm - 12:15 pmSTL-CPH

15h 55m2 stops

6:05 am - 7:29 pmCPH-STL

20h 24m2 stops

$594Finnair

Find Deal

Wed, Dec 3 - Wed, Dec 10

4:05 pm - 9:00 amSTL-CPH

33h 55m2 stops

6:50 am - 1:55 pmCPH-STL

14h 05m1 stop

$600

Find Deal

Wed, Dec 3 - Wed, Dec 10

1:35 pm - 5:00 pmSTL-CPH

20h 25m2 stops

2:15 pm - 4:35 pmCPH-STL

33h 20m2 stops

$640Delta

Find Deal

Sun, Nov 23 - Mon, Dec 1

6:43 pm - 11:05 pmSTL-CPH

21h 22m2 stops

6:50 am - 1:55 pmCPH-STL

14h 05m1 stop

$651United Airlines

Find Deal

Fri, Nov 28 - Wed, Dec 3

6:43 pm - 5:35 pmSTL-CPH

15h 52m2 stops

2:20 pm - 3:29 pmCPH-STL

32h 09m2 stops

$658United Airlines

Find Deal

Fri, Nov 28 - Thu, Dec 4

4:05 pm - 9:00 amSTL-CPH

33h 55m2 stops

9:50 am - 3:29 pmCPH-STL

36h 39m2 stops

$665Air Canada

Find Deal

Mon, Dec 1 - Sun, Dec 7

4:05 pm - 9:20 amSTL-CPH

34h 15m2 stops

9:50 am - 3:29 pmCPH-STL

36h 39m2 stops

$671Air Canada

Find Deal

Sun, Nov 30 - Sun, Dec 7

6:00 am - 11:15 amSTL-CPH

22h 15m2 stops

8:40 am - 7:36 pmCPH-STL

17h 56m2 stops

$692American Airlines

Find Deal

Thu, Nov 27 - Sat, Dec 6

4:30 pm - 5:00 pmSTL-CPH

17h 30m2 stops

2:15 pm - 4:33 pmCPH-STL

33h 18m2 stops

$696Delta

Find Deal

Sun, Nov 23 - Sun, Nov 30

Air Canada flights from St. Louis to Copenhagen

Our best Air Canada deals on St. Louis to Copenhagen flight tickets

Air Canada

Dec 1

STL4:05 pmLambert-St Louis

33h 55m

2 stops

CPH9:00 amKastrup Copenhagen

Dec 7

CPH9:50 amKastrup Copenhagen

36h 39m

2 stops

STL3:29 pmLambert-St Louis

$665

Find similar

Air Canada

Nov 30

STL4:05 pmLambert-St Louis

34h 15m

2 stops

CPH9:20 amKastrup Copenhagen

Dec 7

CPH9:50 amKastrup Copenhagen

36h 39m

2 stops

STL3:29 pmLambert-St Louis

$671

Find similar

Air Canada

Dec 1

STL4:05 pmLambert-St Louis

14h 55m

2 stops

CPH2:00 pmKastrup Copenhagen

Dec 5

CPH6:50 amKastrup Copenhagen

39h 39m

2 stops

STL3:29 pmLambert-St Louis

$707

Find similar

United Airlines flights from St. Louis to Copenhagen

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

United Airlines

Nov 28

STL6:43 pmLambert-St Louis

21h 22m

2 stops

CPH11:05 pmKastrup Copenhagen

Dec 3

CPH6:50 amKastrup Copenhagen

14h 05m

1 stop

STL1:55 pmLambert-St Louis

$651

Find similar

United Airlines

Nov 28

STL6:43 pmLambert-St Louis

15h 52m

2 stops

CPH5:35 pmKastrup Copenhagen

Dec 4

CPH2:20 pmKastrup Copenhagen

32h 09m

2 stops

STL3:29 pmLambert-St Louis

$658

Find similar

United Airlines

Nov 28

STL3:50 pmLambert-St Louis

19h 25m

1 stop

CPH6:15 pmKastrup Copenhagen

Dec 5

CPH10:10 amKastrup Copenhagen

19h 35m

2 stops

STL10:45 pmLambert-St Louis

$661

Find similar

Fly from

Fly to

Route

Depart

Return

Price

St. LouisCopenhagen

STL - CPH

STLCPH

Lambert-St Louis

Mon 12/1

1:55 pm-10:40 am

1 stop13h 45m

Kastrup Copenhagen

Thu 12/4

1:15 pm-9:03 pm

1 stop14h 48m

$589

St. LouisCopenhagen

STL - CPH

STLCPH

Lambert-St Louis

Wed 12/3

1:20 pm-12:15 pm

2 stops15h 55m

Kastrup Copenhagen

Wed 12/10

6:05 am-7:29 pm

2 stops20h 24m

$594

St. LouisCopenhagen

STL - CPH

STLCPH

Lambert-St Louis

Wed 12/3

4:05 pm-9:00 am

2 stops33h 55m

Kastrup Copenhagen

Wed 12/10

6:50 am-1:55 pm

1 stop14h 05m

$600

St. LouisCopenhagen

STL - CPH

STLCPH

Lambert-St Louis

Sun 11/23

1:35 pm-5:00 pm

2 stops20h 25m

Kastrup Copenhagen

Mon 12/1

2:15 pm-4:35 pm

2 stops33h 20m

$640

St. LouisCopenhagen

STL - CPH

STLCPH

Lambert-St Louis

Fri 11/28

6:43 pm-11:05 pm

2 stops21h 22m

Kastrup Copenhagen

Wed 12/3

6:50 am-1:55 pm

1 stop14h 05m

$651

St. LouisCopenhagen

STL - CPH

STLCPH

Lambert-St Louis

Fri 11/28

6:43 pm-5:35 pm

2 stops15h 52m

Kastrup Copenhagen

Thu 12/4

2:20 pm-3:29 pm

2 stops32h 09m

$658

St. LouisCopenhagen

STL - CPH

STLCPH

Lambert-St Louis

Mon 12/1

4:05 pm-9:00 am

2 stops33h 55m

Kastrup Copenhagen

Sun 12/7

9:50 am-3:29 pm

2 stops36h 39m

$665

St. LouisCopenhagen

STL - CPH

STLCPH

Lambert-St Louis

Sun 11/30

4:05 pm-9:20 am

2 stops34h 15m

Kastrup Copenhagen

Sun 12/7

9:50 am-3:29 pm

2 stops36h 39m

$671

St. LouisCopenhagen

STL - CPH

STLCPH

Lambert-St Louis

Thu 11/27

6:00 am-11:15 am

2 stops22h 15m

Kastrup Copenhagen

Sat 12/6

8:40 am-7:36 pm

2 stops17h 56m

$692

St. LouisCopenhagen

STL - CPH

STLCPH

Lambert-St Louis

Sun 11/23

4:30 pm-5:00 pm

2 stops17h 30m

Kastrup Copenhagen

Sun 11/30

2:15 pm-4:33 pm

2 stops33h 18m

$696

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 13 resultsSorted 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 February. Flight prices, which tend to average around $659, 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 February, then flying in January is also cheap. Prices for this month can be found on momondo for an average of $683.

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 $863 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 $749 on momondo.

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 September 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 Air Canada, making up 21% of the total bookings. Other popular airlines include American Airlines with 19%, United Airlines with 16%, and Scandinavian Airlines with 16%.

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
Delta	PriceFrom $593	Free Cancellation	Rating 7.9 7,977 reviews	Search Delta flights
KLM	PriceFrom $625	Free Cancellation	Rating 7.8 1,383 reviews	Search KLM flights
Lufthansa	PriceFrom $626	Free Cancellation	Rating 6.8 7,390 reviews	Search Lufthansa flights
United Airlines	PriceFrom $654	Free Cancellation	Rating 7.4 8,937 reviews	Search United Airlines flights
Scandinavian Airlines	PriceFrom $655	Free Cancellation	Rating 7.4 1,482 reviews	Search Scandinavian Airlines flights
Air Canada	PriceFrom $659	Free Cancellation	Rating 7.1 10,000 reviews	Search Air Canada flights
British Airways	PriceFrom $663	Free Cancellation	Rating 6.7 7,345 reviews	Search British Airways flights
American Airlines	PriceFrom $821	Free Cancellation	Rating 7.2 10,000 reviews	Search American Airlines flights

Kastrup

Roskilde

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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.

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Cheap flights from St. Louis to Copenhagen from $323

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from St. Louis to Copenhagen departing on 11/18. 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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Air Canada flights from St. Louis to Copenhagen

Our best Air Canada 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?

What is the cheapest airline that flies from Lambert-St Louis to Kastrup Copenhagen?

Delta is the most popular carrier operating from Lambert-St Louis to Kastrup Copenhagen

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: 62% 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 Philadelphia (PHL) offer the lowest average round-trip price of $972.

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