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Cheap flights from St. Louis to Copenhagen from $399

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 8/14. 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
1 adult, Economy, 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.
British Airways Logo
9:40 pm - 5:20 pm
STL
-
CPH
12h 40m
1 stop
British Airways Logo
8:50 am - 7:46 pm
CPH
-
STL
17h 56m
2 stops
$746British Airways
Sun, Sep 13 - Sat, Sep 19
Multiple Airlines Logo
9:40 pm - 5:20 pm
STL
-
CPH
12h 40m
1 stop
Multiple Airlines Logo
7:45 am - 7:46 pm
CPH
-
STL
19h 01m
2 stops
$747Multiple Airlines
Sun, Sep 13 - Thu, Sep 17
British Airways Logo
9:40 pm - 5:20 pm
STL
-
CPH
12h 40m
1 stop
British Airways Logo
8:50 am - 7:46 pm
CPH
-
STL
17h 56m
2 stops
$748British Airways
Sun, Sep 13 - Sat, Sep 19
Scandinavian Airlines Logo
3:42 pm - 10:15 am
STL
-
CPH
11h 33m
1 stop
Scandinavian Airlines Logo
1:35 pm - 11:37 pm
CPH
-
STL
17h 02m
1 stop
$760Scandinavian Airlines
Mon, Sep 14 - Mon, Sep 21
Multiple Airlines Logo
1:18 pm - 11:55 am
STL
-
CPH
15h 37m
2 stops
Multiple Airlines Logo
8:50 am - 7:46 pm
CPH
-
STL
17h 56m
2 stops
$762Multiple Airlines
Sun, Sep 13 - Thu, Sep 17
KLM Logo
4:25 pm - 6:45 am
STL
-
CPH
31h 20m
1 stop
KLM Logo
9:00 am - 5:05 pm
CPH
-
STL
15h 05m
1 stop
$763KLM
Tue, May 12 - Tue, May 19
Multiple Airlines Logo
11:25 am - 11:45 am
STL
-
CPH
17h 20m
1 stop
Multiple Airlines Logo
9:00 am - 5:16 pm
CPH
-
STL
15h 16m
2 stops
$764Multiple Airlines
Wed, May 13 - Wed, May 20
Multiple Airlines Logo
4:25 pm - 6:45 am
STL
-
CPH
31h 20m
1 stop
Multiple Airlines Logo
9:00 am - 5:16 pm
CPH
-
STL
15h 16m
2 stops
$765Multiple Airlines
Tue, May 12 - Tue, May 19
Multiple Airlines Logo
5:32 pm - 8:55 am
STL
-
CPH
32h 23m
2 stops
Multiple Airlines Logo
8:50 am - 10:00 pm
CPH
-
STL
20h 10m
2 stops
$768Multiple Airlines
Sat, Sep 5 - Sat, Sep 26
Multiple Airlines Logo
12:10 pm - 9:35 am
STL
-
CPH
14h 25m
2 stops
Multiple Airlines Logo
8:50 am - 10:00 pm
CPH
-
STL
20h 10m
2 stops
$771Multiple Airlines
Sun, Sep 13 - Sat, Sep 19

Delta flights from St. Louis to Copenhagen

Our best Delta deals on St. Louis to Copenhagen flight tickets
Delta
Sep 2
STL9:00 amLambert-St Louis
14h 45m
1 stop
CPH6:45 amKastrup Copenhagen
Sep 24
CPH9:00 amKastrup Copenhagen
18h 50m
1 stop
STL8:50 pmLambert-St Louis
$780
Delta
Aug 31
STL6:45 amLambert-St Louis
17h 00m
2 stops
CPH6:45 amKastrup Copenhagen
Sep 15
CPH9:00 amKastrup Copenhagen
14h 55m
1 stop
STL4:55 pmLambert-St Louis
$785
Delta
Sep 13
STL6:30 amLambert-St Louis
22h 15m
1 stop
CPH11:45 amKastrup Copenhagen
Sep 21
CPH9:00 amKastrup Copenhagen
14h 55m
1 stop
STL4:55 pmLambert-St Louis
$786

KLM flights from St. Louis to Copenhagen

Our best KLM deals on St. Louis to Copenhagen flight tickets
KLM
May 12
STL4:25 pmLambert-St Louis
31h 20m
1 stop
CPH6:45 amKastrup Copenhagen
May 19
CPH9:00 amKastrup Copenhagen
15h 05m
1 stop
STL5:05 pmLambert-St Louis
$763
KLM
Sep 10
STL4:13 pmLambert-St Louis
31h 32m
1 stop
CPH6:45 amKastrup Copenhagen
Sep 30
CPH9:00 amKastrup Copenhagen
14h 55m
1 stop
STL4:55 pmLambert-St Louis
$840

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 2, 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-5:20 pm

1 stop12h 40m

Kastrup Copenhagen

Sat 9/19

8:50 am-7:46 pm

2 stops17h 56m

$746

St. LouisCopenhagen

STL - CPH

STLCPH

Lambert-St Louis

Sun 9/13

9:40 pm-5:20 pm

1 stop12h 40m

Kastrup Copenhagen

Thu 9/17

7:45 am-7:46 pm

2 stops19h 01m

$747

St. LouisCopenhagen

STL - CPH

STLCPH

Lambert-St Louis

Sun 9/13

9:40 pm-5:20 pm

1 stop12h 40m

Kastrup Copenhagen

Sat 9/19

8:50 am-7:46 pm

2 stops17h 56m

$748
Quickest round-trip

St. LouisCopenhagen

STL - CPH

STLCPH

Lambert-St Louis

Mon 9/14

3:42 pm-10:15 am

1 stop11h 33m

Kastrup Copenhagen

Mon 9/21

1:35 pm-11:37 pm

1 stop17h 02m

$760

St. LouisCopenhagen

STL - CPH

STLCPH

Lambert-St Louis

Sun 9/13

1:18 pm-11:55 am

2 stops15h 37m

Kastrup Copenhagen

Thu 9/17

8:50 am-7:46 pm

2 stops17h 56m

$762

St. LouisCopenhagen

STL - CPH

STLCPH

Lambert-St Louis

Tue 5/12

4:25 pm-6:45 am

1 stop31h 20m

Kastrup Copenhagen

Tue 5/19

9:00 am-5:05 pm

1 stop15h 05m

$763

St. LouisCopenhagen

STL - CPH

STLCPH

Lambert-St Louis

Wed 5/13

11:25 am-11:45 am

1 stop17h 20m

Kastrup Copenhagen

Wed 5/20

9:00 am-5:16 pm

2 stops15h 16m

$764

St. LouisCopenhagen

STL - CPH

STLCPH

Lambert-St Louis

Tue 5/12

4:25 pm-6:45 am

1 stop31h 20m

Kastrup Copenhagen

Tue 5/19

9:00 am-5:16 pm

2 stops15h 16m

$765

St. LouisCopenhagen

STL - CPH

STLCPH

Lambert-St Louis

Sat 9/5

5:32 pm-8:55 am

2 stops32h 23m

Kastrup Copenhagen

Sat 9/26

8:50 am-10:00 pm

2 stops20h 10m

$768

St. LouisCopenhagen

STL - CPH

STLCPH

Lambert-St Louis

Sun 9/13

12:10 pm-9:35 am

2 stops14h 25m

Kastrup Copenhagen

Sat 9/19

8:50 am-10:00 pm

2 stops20h 10m

$771

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 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 April is also cheap. Prices for this month can be found on momondo for an average of $640.

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 $778 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 $601 on momondo.

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

You could potentially save up to 25% 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 35m

Direct flights

None
The fastest flight from St. Louis to Copenhagen takes 11h 35m
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 35m.

  • 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
7,841 reviews
Search British Airways flights
United AirlinesPriceFrom $592Free CancellationRating
7.4
9,535 reviews
Search United Airlines flights
American AirlinesPriceFrom $635Free CancellationRating
7.1
11,549 reviews
Search American Airlines flights
DeltaPriceFrom $643Free CancellationRating
7.9
8,372 reviews
Search Delta flights
Air CanadaPriceFrom $659Free CancellationRating
7.1
10,884 reviews
Search Air Canada flights
Scandinavian AirlinesPriceFrom $661Free CancellationRating
7.3
1,737 reviews
Search Scandinavian Airlines flights
LufthansaPriceFrom $690Free CancellationRating
6.8
7,885 reviews
Search Lufthansa 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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