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Cheap flights from St. Louis to Copenhagen from $300

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 5/8. 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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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.
United Airlines Logo
9:14 am - 5:20 pm
STL
-
CPH
25h 06m
2 stops
United Airlines Logo
6:20 am - 1:25 pm
CPH
-
STL
14h 05m
1 stop
$645United Airlines
Wed, May 6 - Wed, May 13
United Airlines Logo
9:14 am - 5:20 pm
STL
-
CPH
25h 06m
2 stops
United Airlines Logo
6:20 am - 8:25 pm
CPH
-
STL
21h 05m
2 stops
$649United Airlines
Wed, May 6 - Wed, May 13
Multiple Airlines Logo
5:00 pm - 11:25 pm
STL
-
CPH
23h 25m
2 stops
Multiple Airlines Logo
5:00 pm - 7:30 pm
CPH
-
STL
33h 30m
2 stops
$656Multiple Airlines
Sat, Aug 1 - Mon, Aug 17
KLM Logo
5:35 pm - 11:30 am
STL
-
CPH
10h 55m
1 stop
KLM Logo
9:00 am - 5:05 pm
CPH
-
STL
15h 05m
1 stop
$659KLM
Wed, May 6 - Wed, May 13
United Airlines Logo
7:00 pm - 12:25 pm
STL
-
CPH
35h 25m
2 stops
United Airlines Logo
10:10 am - 10:12 am
CPH
-
STL
30h 02m
2 stops
$663United Airlines
Tue, Mar 10 - Fri, Mar 13
Multiple Airlines Logo
1:13 pm - 11:55 am
STL
-
CPH
15h 42m
2 stops
Multiple Airlines Logo
7:50 am - 8:23 pm
CPH
-
STL
19h 33m
2 stops
$677Multiple Airlines
Sat, Aug 8 - Sat, Aug 15
Finnair Logo
5:21 pm - 4:15 pm
STL
-
CPH
15h 54m
2 stops
Finnair Logo
7:25 pm - 7:30 pm
CPH
-
STL
31h 05m
2 stops
$715Finnair
Sun, Apr 19 - Sat, Apr 25
Air Canada Logo
2:40 pm - 8:55 am
STL
-
CPH
35h 15m
2 stops
Air Canada Logo
12:15 pm - 6:27 pm
CPH
-
STL
13h 12m
1 stop
$721Air Canada
Sat, Aug 1 - Mon, Aug 17
United Airlines Logo
7:05 am - 9:25 am
STL
-
CPH
19h 20m
2 stops
United Airlines Logo
6:30 am - 1:25 pm
CPH
-
STL
13h 55m
1 stop
$726United Airlines
Tue, May 19 - Fri, May 29
United Airlines Logo
6:15 am - 2:25 pm
STL
-
CPH
25h 10m
3 stops
United Airlines Logo
12:40 pm - 3:24 pm
CPH
-
STL
57h 44m
2 stops
$727United Airlines
Sun, Apr 19 - Sat, Apr 25

United Airlines flights from St. Louis to Copenhagen

Our best United Airlines deals on St. Louis to Copenhagen flight tickets
United Airlines
May 6
STL9:14 amLambert-St Louis
25h 06m
2 stops
CPH5:20 pmKastrup Copenhagen
May 13
CPH6:20 amKastrup Copenhagen
14h 05m
1 stop
STL1:25 pmLambert-St Louis
$645
United Airlines
May 6
STL9:14 amLambert-St Louis
25h 06m
2 stops
CPH5:20 pmKastrup Copenhagen
May 13
CPH6:20 amKastrup Copenhagen
21h 05m
2 stops
STL8:25 pmLambert-St Louis
$649
United Airlines
Mar 10
STL7:00 pmLambert-St Louis
35h 25m
2 stops
CPH12:25 pmKastrup Copenhagen
Mar 13
CPH10:10 amKastrup Copenhagen
30h 02m
2 stops
STL10:12 amLambert-St Louis
$663

KLM flights from St. Louis to Copenhagen

Our best KLM deals on St. Louis to Copenhagen flight tickets
KLM
May 6
STL5:35 pmLambert-St Louis
10h 55m
1 stop
CPH11:30 amKastrup Copenhagen
May 13
CPH9:00 amKastrup Copenhagen
15h 05m
1 stop
STL5:05 pmLambert-St Louis
$659
KLM
May 26
STL4:20 pmLambert-St Louis
31h 25m
1 stop
CPH6:45 amKastrup Copenhagen
Jun 11
CPH9:00 amKastrup Copenhagen
14h 55m
1 stop
STL4:55 pmLambert-St Louis
$855
KLM
May 19
STL4:20 pmLambert-St Louis
31h 25m
1 stop
CPH6:45 amKastrup Copenhagen
May 29
CPH9:00 amKastrup Copenhagen
15h 05m
1 stop
STL5:05 pmLambert-St Louis
$971

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 March 1, 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

St. LouisCopenhagen

STL - CPH

STLCPH

Lambert-St Louis

Wed 5/6

9:14 am-5:20 pm

2 stops25h 06m

Kastrup Copenhagen

Wed 5/13

6:20 am-1:25 pm

1 stop14h 05m

$645

St. LouisCopenhagen

STL - CPH

STLCPH

Lambert-St Louis

Wed 5/6

9:14 am-5:20 pm

2 stops25h 06m

Kastrup Copenhagen

Wed 5/13

6:20 am-8:25 pm

2 stops21h 05m

$649

St. LouisCopenhagen

STL - CPH

STLCPH

Lambert-St Louis

Sat 8/1

5:00 pm-11:25 pm

2 stops23h 25m

Kastrup Copenhagen

Mon 8/17

5:00 pm-7:30 pm

2 stops33h 30m

$656

St. LouisCopenhagen

STL - CPH

STLCPH

Lambert-St Louis

Wed 5/6

5:35 pm-11:30 am

1 stop10h 55m

Kastrup Copenhagen

Wed 5/13

9:00 am-5:05 pm

1 stop15h 05m

$659

St. LouisCopenhagen

STL - CPH

STLCPH

Lambert-St Louis

Tue 3/10

7:00 pm-12:25 pm

2 stops35h 25m

Kastrup Copenhagen

Fri 3/13

10:10 am-10:12 am

2 stops30h 02m

$663

St. LouisCopenhagen

STL - CPH

STLCPH

Lambert-St Louis

Sat 8/8

1:13 pm-11:55 am

2 stops15h 42m

Kastrup Copenhagen

Sat 8/15

7:50 am-8:23 pm

2 stops19h 33m

$677

St. LouisCopenhagen

STL - CPH

STLCPH

Lambert-St Louis

Sun 4/19

5:21 pm-4:15 pm

2 stops15h 54m

Kastrup Copenhagen

Sat 4/25

7:25 pm-7:30 pm

2 stops31h 05m

$715

St. LouisCopenhagen

STL - CPH

STLCPH

Lambert-St Louis

Sat 8/1

2:40 pm-8:55 am

2 stops35h 15m

Kastrup Copenhagen

Mon 8/17

12:15 pm-6:27 pm

1 stop13h 12m

$721

St. LouisCopenhagen

STL - CPH

STLCPH

Lambert-St Louis

Tue 5/19

7:05 am-9:25 am

2 stops19h 20m

Kastrup Copenhagen

Fri 5/29

6:30 am-1:25 pm

1 stop13h 55m

$726

St. LouisCopenhagen

STL - CPH

STLCPH

Lambert-St Louis

Sun 4/19

6:15 am-2:25 pm

3 stops25h 10m

Kastrup Copenhagen

Sat 4/25

12:40 pm-3:24 pm

2 stops57h 44m

$727

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
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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 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 $787 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 5% 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 15m

Direct flights

None
The fastest flight from St. Louis to Copenhagen takes 11h 15m
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 11h 15m.

  • 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
7,773 reviews
Search British Airways flights
United AirlinesPriceFrom $592Free CancellationRating
7.4
9,372 reviews
Search United Airlines flights
DeltaPriceFrom $593Free CancellationRating
7.9
8,239 reviews
Search Delta flights
KLMPriceFrom $625Free CancellationRating
7.7
1,461 reviews
Search KLM flights
Scandinavian AirlinesPriceFrom $655Free CancellationRating
7.3
1,701 reviews
Search Scandinavian Airlines flights
Air CanadaPriceFrom $659Free CancellationRating
7.1
10,762 reviews
Search Air Canada flights
LufthansaPriceFrom $662Free CancellationRating
6.8
7,820 reviews
Search Lufthansa flights
American AirlinesPriceFrom $684Free CancellationRating
7.1
11,373 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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