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Cheap flights from St. Louis to Copenhagen from $618

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 5/20. 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
0 bags

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Find the cheapest flights from St. Louis to Copenhagen

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
9:40 pm - 8:50 pm
STL
-
CPH
16h 10m
1 stop
Multiple Airlines Logo
7:25 pm - 7:46 pm
CPH
-
STL
31h 21m
2 stops
$769Multiple Airlines
Sun, Sep 13 - Mon, Sep 21
Multiple Airlines Logo
12:10 pm - 8:55 am
STL
-
CPH
13h 45m
1 stop
Multiple Airlines Logo
8:50 am - 7:46 pm
CPH
-
STL
17h 56m
2 stops
$776Multiple Airlines
Tue, Sep 1 - Wed, Sep 30
Multiple Airlines Logo
11:18 am - 3:55 pm
STL
-
CPH
21h 37m
2 stops
Multiple Airlines Logo
7:25 pm - 7:46 pm
CPH
-
STL
31h 21m
2 stops
$783Multiple Airlines
Sun, Sep 13 - Mon, Sep 21
British Airways Logo
8:02 pm - 11:10 pm
STL
-
CPH
20h 08m
2 stops
British Airways Logo
8:50 am - 7:46 pm
CPH
-
STL
17h 56m
2 stops
$789British Airways
Tue, Sep 1 - Wed, Sep 30
United Airlines Logo
8:30 pm - 8:55 am
STL
-
CPH
29h 25m
2 stops
United Airlines Logo
12:45 pm - 12:13 pm
CPH
-
STL
30h 28m
2 stops
$830United Airlines
Mon, Aug 31 - Tue, Sep 15
Multiple Airlines Logo
12:10 pm - 8:55 am
STL
-
CPH
13h 45m
1 stop
Multiple Airlines Logo
6:20 am - 1:25 pm
CPH
-
STL
14h 05m
1 stop
$836Multiple Airlines
Tue, Sep 1 - Wed, Sep 30
Lufthansa Logo
6:55 pm - 4:35 pm
STL
-
CPH
14h 40m
2 stops
Lufthansa Logo
6:45 pm - 1:25 pm
CPH
-
STL
25h 40m
1 stop
$843Lufthansa
Mon, Aug 17 - Mon, Aug 24
Air Canada Logo
6:55 pm - 8:55 am
STL
-
CPH
31h 00m
2 stops
Air Canada Logo
12:45 pm - 2:00 pm
CPH
-
STL
32h 15m
1 stop
$844Air Canada
Mon, Aug 31 - Tue, Sep 15
United Airlines Logo
2:40 pm - 10:50 am
STL
-
CPH
13h 10m
1 stop
United Airlines Logo
12:35 pm - 1:25 pm
CPH
-
STL
31h 50m
1 stop
$846United Airlines
Mon, Aug 17 - Mon, Aug 24
Multiple Airlines Logo
8:55 am - 10:50 am
STL
-
CPH
18h 55m
1 stop
Multiple Airlines Logo
3:10 pm - 1:25 pm
CPH
-
STL
29h 15m
1 stop
$847Multiple Airlines
Mon, Aug 17 - Mon, Aug 24

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United Airlines flights from St. Louis to Copenhagen

Our best United Airlines deals on St. Louis to Copenhagen flight tickets
United Airlines
Aug 31
STL6:55 pmLambert-St Louis
31h 00m
2 stops
CPH8:55 amKastrup Copenhagen
Sep 15
CPH12:45 pmKastrup Copenhagen
30h 28m
2 stops
STL12:13 pmLambert-St Louis
$830
United Airlines
Aug 17
STL2:40 pmLambert-St Louis
13h 10m
1 stop
CPH10:50 amKastrup Copenhagen
Aug 24
CPH12:35 pmKastrup Copenhagen
31h 50m
1 stop
STL1:25 pmLambert-St Louis
$846
United Airlines
Aug 17
STL8:30 pmLambert-St Louis
29h 25m
2 stops
CPH8:55 amKastrup Copenhagen
Aug 24
CPH12:35 pmKastrup Copenhagen
37h 07m
2 stops
STL6:42 pmLambert-St Louis
$849

Air Canada flights from St. Louis to Copenhagen

Our best Air Canada deals on St. Louis to Copenhagen flight tickets
Air Canada
Aug 31
STL6:55 pmLambert-St Louis
31h 00m
2 stops
CPH8:55 amKastrup Copenhagen
Sep 15
CPH12:45 pmKastrup Copenhagen
32h 15m
1 stop
STL2:00 pmLambert-St Louis
$844
Air Canada
Aug 31
STL12:10 pmLambert-St Louis
15h 40m
2 stops
CPH10:50 amKastrup Copenhagen
Sep 15
CPH12:45 pmKastrup Copenhagen
36h 56m
2 stops
STL6:41 pmLambert-St Louis
$867
Air Canada
Jun 7
STL1:05 pmLambert-St Louis
12h 50m
1 stop
CPH8:55 amKastrup Copenhagen
Jun 10
CPH12:15 pmKastrup Copenhagen
15h 10m
1 stop
STL8:25 pmLambert-St Louis
$906

momondo Fare Finder

 
Customize your flight search to find flights from St. Louis to Copenhagen 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 April 28, 2026.
Use the filters below to find and compare flights from St. Louis to Copenhagen that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

St. LouisCopenhagen

STL - CPH

STLCPH

Lambert-St Louis

Sun 9/13

9:40 pm-8:50 pm

1 stop16h 10m

Kastrup Copenhagen

Mon 9/21

7:25 pm-7:46 pm

2 stops31h 21m

$769

St. LouisCopenhagen

STL - CPH

STLCPH

Lambert-St Louis

Tue 9/1

12:10 pm-8:55 am

1 stop13h 45m

Kastrup Copenhagen

Wed 9/30

8:50 am-7:46 pm

2 stops17h 56m

$776

St. LouisCopenhagen

STL - CPH

STLCPH

Lambert-St Louis

Sun 9/13

11:18 am-3:55 pm

2 stops21h 37m

Kastrup Copenhagen

Mon 9/21

7:25 pm-7:46 pm

2 stops31h 21m

$783

St. LouisCopenhagen

STL - CPH

STLCPH

Lambert-St Louis

Tue 9/1

8:02 pm-11:10 pm

2 stops20h 08m

Kastrup Copenhagen

Wed 9/30

8:50 am-7:46 pm

2 stops17h 56m

$789

St. LouisCopenhagen

STL - CPH

STLCPH

Lambert-St Louis

Mon 8/31

8:30 pm-8:55 am

2 stops29h 25m

Kastrup Copenhagen

Tue 9/15

12:45 pm-12:13 pm

2 stops30h 28m

$830
Quickest round-trip

St. LouisCopenhagen

STL - CPH

STLCPH

Lambert-St Louis

Tue 9/1

12:10 pm-8:55 am

1 stop13h 45m

Kastrup Copenhagen

Wed 9/30

6:20 am-1:25 pm

1 stop14h 05m

$836

St. LouisCopenhagen

STL - CPH

STLCPH

Lambert-St Louis

Mon 8/17

6:55 pm-4:35 pm

2 stops14h 40m

Kastrup Copenhagen

Mon 8/24

6:45 pm-1:25 pm

1 stop25h 40m

$843

St. LouisCopenhagen

STL - CPH

STLCPH

Lambert-St Louis

Mon 8/31

6:55 pm-8:55 am

2 stops31h 00m

Kastrup Copenhagen

Tue 9/15

12:45 pm-2:00 pm

1 stop32h 15m

$844

St. LouisCopenhagen

STL - CPH

STLCPH

Lambert-St Louis

Mon 8/17

2:40 pm-10:50 am

1 stop13h 10m

Kastrup Copenhagen

Mon 8/24

12:35 pm-1:25 pm

1 stop31h 50m

$846

St. LouisCopenhagen

STL - CPH

STLCPH

Lambert-St Louis

Mon 8/17

8:55 am-10:50 am

1 stop18h 55m

Kastrup Copenhagen

Mon 8/24

3:10 pm-1:25 pm

1 stop29h 15m

$847

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 18 resultsSorted by cheapest first
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See travel insights to Copenhagen from

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 typical price of a round-trip flight between St. Louis and Copenhagen?

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 $523, 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 $667.

How far in advance should I book a flight from St. Louis 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 $815 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 $711 on momondo.

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

You could potentially save up to 19% 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

Fastest flight time

11h 09m

Direct flights

None
The fastest flight from St. Louis to Copenhagen takes 11h 09m
There are no direct flights from St. Louis to Copenhagen. There are no popular flight routes from St. Louis to Copenhagen.
Search flight deals

Frequently asked questions about flying from St. Louis to Copenhagen

  • 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 11h 09m.

  • 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?

  • 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?

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
British AirwaysPriceFrom $523Free CancellationRating
6.7
7,931 reviews
Search British Airways flights
United AirlinesPriceFrom $592Free CancellationRating
7.4
9,675 reviews
Search United Airlines flights
DeltaPriceFrom $643Free CancellationRating
7.9
8,466 reviews
Search Delta flights
Scandinavian AirlinesPriceFrom $661Free CancellationRating
7.4
1,762 reviews
Search Scandinavian Airlines flights
LufthansaPriceFrom $662Free CancellationRating
6.8
7,959 reviews
Search Lufthansa flights
American AirlinesPriceFrom $684Free CancellationRating
7.1
11,676 reviews
Search American Airlines flights
Air CanadaPriceFrom $734Free CancellationRating
7.1
10,976 reviews
Search Air Canada flights

Traveling to a place near Copenhagen?

Book flights to Copenhagen if you plan to visit one of these locations
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.

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