Cheap flights from St. Louis to Copenhagen from $324

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 9/29. 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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Cheap round-trip flights

Scandinavian Airlines Logo
4:00 pm - 10:40 amSTL-CPH
11h 40m1 stop
Scandinavian Airlines Logo
1:15 pm - 11:40 pmCPH-STL
17h 25m1 stop
$563Scandinavian Airlines
Find Deal
Mon, Jan 12 - Sat, Jan 17
Delta Logo
6:40 am - 6:30 amSTL-CPH
16h 50m2 stops
Delta Logo
9:00 am - 8:23 pmCPH-STL
18h 23m2 stops
$616Delta
Find Deal
Wed, Oct 15 - Wed, Oct 22
Lufthansa Logo
6:43 pm - 5:35 pmSTL-CPH
16h 52m2 stops
Lufthansa Logo
6:50 am - 1:55 pmCPH-STL
14h 05m1 stop
$637Lufthansa
Find Deal
Mon, Oct 27 - Sun, Nov 9
Lufthansa Logo
3:50 pm - 1:45 pmSTL-CPH
14h 55m1 stop
Lufthansa Logo
6:50 am - 2:55 pmCPH-STL
14h 05m1 stop
$651Lufthansa
Find Deal
Fri, Mar 6 - Fri, Mar 13
United Airlines Logo
1:00 pm - 11:45 amSTL-CPH
15h 45m2 stops
United Airlines Logo
6:50 am - 1:55 pmCPH-STL
14h 05m1 stop
$656United Airlines
Find Deal
Wed, Dec 3 - Sun, Dec 7
United Airlines Logo
3:50 pm - 6:15 pmSTL-CPH
19h 25m1 stop
United Airlines Logo
6:50 am - 3:29 pmCPH-STL
38h 39m2 stops
$660United Airlines
Find Deal
Fri, Mar 6 - Fri, Mar 13
Air Canada Logo
4:05 pm - 1:45 pmSTL-CPH
14h 40m2 stops
Air Canada Logo
2:30 pm - 3:29 pmCPH-STL
30h 59m2 stops
$667Air Canada
Find Deal
Fri, Mar 6 - Fri, Mar 13
Air Canada Logo
6:30 am - 10:50 amSTL-CPH
21h 20m2 stops
Air Canada Logo
2:30 pm - 3:29 pmCPH-STL
31h 59m2 stops
$673Air Canada
Find Deal
Wed, Oct 1 - Sun, Nov 23
American Airlines Logo
12:46 pm - 2:20 pmSTL-CPH
18h 34m2 stops
American Airlines Logo
6:25 am - 7:07 pmCPH-STL
19h 42m2 stops
$1,263American Airlines
Find Deal
Sat, Dec 20 - Tue, Jan 6
American Airlines Logo
10:01 am - 11:45 amSTL-CPH
18h 44m2 stops
American Airlines Logo
6:25 am - 7:07 pmCPH-STL
19h 42m2 stops
$1,267American Airlines
Find Deal
Sat, Dec 20 - Tue, Jan 6

Scandinavian Airlines flights from St. Louis to Copenhagen

Our best Scandinavian Airlines deals on St. Louis to Copenhagen flight tickets
Scandinavian Airlines
Jan 12
STL4:00 pmLambert-St Louis
11h 40m
1 stop
CPH10:40 amKastrup Copenhagen
Jan 17
CPH1:15 pmKastrup Copenhagen
17h 25m
1 stop
STL11:40 pmLambert-St Louis
Scandinavian Airlines
Dec 1
STL1:55 pmLambert-St Louis
13h 45m
1 stop
CPH10:40 amKastrup Copenhagen
Dec 5
CPH1:15 pmKastrup Copenhagen
17h 26m
1 stop
STL11:41 pmLambert-St Louis
Scandinavian Airlines
Nov 1
STL5:15 pmLambert-St Louis
11h 25m
1 stop
CPH10:40 amKastrup Copenhagen
Nov 8
CPH1:15 pmKastrup Copenhagen
15h 49m
1 stop
STL10:04 pmLambert-St Louis

American Airlines flights from St. Louis to Copenhagen

Our best American Airlines deals on St. Louis to Copenhagen flight tickets
American Airlines
Dec 20
STL12:46 pmLambert-St Louis
18h 34m
2 stops
CPH2:20 pmKastrup Copenhagen
Jan 6
CPH6:25 amKastrup Copenhagen
19h 42m
2 stops
STL7:07 pmLambert-St Louis
American Airlines
Dec 20
STL10:01 amLambert-St Louis
18h 44m
2 stops
CPH11:45 amKastrup Copenhagen
Jan 6
CPH6:25 amKastrup Copenhagen
19h 42m
2 stops
STL7:07 pmLambert-St Louis

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 September 18, 2025.
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

St. LouisCopenhagen

STL - CPH

STLCPH

Lambert-St Louis

Mon 1/12

4:00 pm-10:40 am

1 stop11h 40m

Kastrup Copenhagen

Sat 1/17

1:15 pm-11:40 pm

1 stop17h 25m

$563

St. LouisCopenhagen

STL - CPH

STLCPH

Lambert-St Louis

Wed 10/15

6:40 am-6:30 am

2 stops16h 50m

Kastrup Copenhagen

Wed 10/22

9:00 am-8:23 pm

2 stops18h 23m

$616

St. LouisCopenhagen

STL - CPH

STLCPH

Lambert-St Louis

Mon 10/27

6:43 pm-5:35 pm

2 stops16h 52m

Kastrup Copenhagen

Sun 11/9

6:50 am-1:55 pm

1 stop14h 05m

$637

St. LouisCopenhagen

STL - CPH

STLCPH

Lambert-St Louis

Fri 3/6

3:50 pm-1:45 pm

1 stop14h 55m

Kastrup Copenhagen

Fri 3/13

6:50 am-2:55 pm

1 stop14h 05m

$651

St. LouisCopenhagen

STL - CPH

STLCPH

Lambert-St Louis

Wed 12/3

1:00 pm-11:45 am

2 stops15h 45m

Kastrup Copenhagen

Sun 12/7

6:50 am-1:55 pm

1 stop14h 05m

$656

St. LouisCopenhagen

STL - CPH

STLCPH

Lambert-St Louis

Fri 3/6

3:50 pm-6:15 pm

1 stop19h 25m

Kastrup Copenhagen

Fri 3/13

6:50 am-3:29 pm

2 stops38h 39m

$660

St. LouisCopenhagen

STL - CPH

STLCPH

Lambert-St Louis

Fri 3/6

4:05 pm-1:45 pm

2 stops14h 40m

Kastrup Copenhagen

Fri 3/13

2:30 pm-3:29 pm

2 stops30h 59m

$667

St. LouisCopenhagen

STL - CPH

STLCPH

Lambert-St Louis

Wed 10/1

6:30 am-10:50 am

2 stops21h 20m

Kastrup Copenhagen

Sun 11/23

2:30 pm-3:29 pm

2 stops31h 59m

$673

St. LouisCopenhagen

STL - CPH

STLCPH

Lambert-St Louis

Sat 12/20

12:46 pm-2:20 pm

2 stops18h 34m

Kastrup Copenhagen

Tue 1/6

6:25 am-7:07 pm

2 stops19h 42m

$1,263

St. LouisCopenhagen

STL - CPH

STLCPH

Lambert-St Louis

Sat 12/20

10:01 am-11:45 am

2 stops18h 44m

Kastrup Copenhagen

Tue 1/6

6:25 am-7:07 pm

2 stops19h 42m

$1,267

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 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 $867 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.
  • 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 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?

  • 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
DeltaPriceFrom $609Free CancellationRating
7.9
7,964 reviews
Search Delta flights
KLMPriceFrom $625Free CancellationRating
7.8
1,386 reviews
Search KLM flights
United AirlinesPriceFrom $653Free CancellationRating
7.4
8,926 reviews
Search United Airlines flights
Scandinavian AirlinesPriceFrom $655Free CancellationRating
7.4
1,487 reviews
Search Scandinavian Airlines flights
Air CanadaPriceFrom $659Free CancellationRating
7.1
10,000 reviews
Search Air Canada flights
British AirwaysPriceFrom $663Free CancellationRating
6.7
7,373 reviews
Search British Airways flights
LufthansaPriceFrom $709Free CancellationRating
6.8
7,415 reviews
Search Lufthansa flights
American AirlinesPriceFrom $733Free CancellationRating
7.2
10,000 reviews
Search American Airlines 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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1 adult
Sat 10/18
Sat 10/25

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