Latest deals
Insights
When to book
FAQs
Reviews
Price Alerts

Cheap flights from St. Louis to Copenhagen from $421

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 8/17. 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

Discover deals from 900+ travel sites with momondo.

Save money when you book flights with momondo

Big names and deals

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

Find the cheapest flights from St. Louis to Copenhagen

Cheap round-trip flights

Enter your travel dates to find the best prices.
Lufthansa Logo
1:27 pm - 12:00 pm
STL
-
CPH
15h 33m
2 stops
Lufthansa Logo
7:10 am - 1:45 pm
CPH
-
STL
13h 35m
1 stop
$780Lufthansa
Mon, Nov 23 - Wed, Nov 25
Air Canada Logo
4:15 pm - 2:10 pm
STL
-
CPH
14h 55m
2 stops
Air Canada Logo
11:35 am - 12:20 pm
CPH
-
STL
31h 45m
2 stops
$787Air Canada
Mon, Nov 23 - Wed, Nov 25
United Airlines Logo
6:30 am - 12:00 pm
STL
-
CPH
22h 30m
3 stops
United Airlines Logo
11:35 am - 11:25 pm
CPH
-
STL
18h 50m
2 stops
$801United Airlines
Mon, Nov 23 - Wed, Nov 25
United Airlines Logo
6:54 pm - 8:55 am
STL
-
CPH
31h 01m
2 stops
United Airlines Logo
12:45 pm - 11:57 am
CPH
-
STL
30h 12m
2 stops
$829United Airlines
Mon, Aug 31 - Tue, Sep 15
United Airlines Logo
6:54 pm - 8:55 am
STL
-
CPH
31h 01m
2 stops
United Airlines Logo
12:45 pm - 8:00 pm
CPH
-
STL
14h 15m
1 stop
$843United Airlines
Mon, Aug 31 - Tue, Sep 15
Air Canada Logo
2:40 pm - 10:50 am
STL
-
CPH
13h 10m
1 stop
Air Canada Logo
12:45 pm - 8:00 pm
CPH
-
STL
14h 15m
1 stop
$859Air Canada
Mon, Aug 31 - Tue, Sep 15
Multiple Airlines Logo
2:40 pm - 10:50 am
STL
-
CPH
13h 10m
1 stop
Multiple Airlines Logo
9:40 am - 3:38 pm
CPH
-
STL
36h 58m
2 stops
$865Multiple Airlines
Mon, Sep 14 - Mon, Sep 21
Lufthansa Logo
12:59 pm - 4:25 pm
STL
-
CPH
20h 26m
2 stops
Lufthansa Logo
7:25 pm - 11:38 pm
CPH
-
STL
35h 13m
2 stops
$869Lufthansa
Sun, Sep 13 - Mon, Sep 21
Multiple Airlines Logo
5:30 pm - 10:50 am
STL
-
CPH
34h 20m
1 stop
Multiple Airlines Logo
9:40 am - 3:38 pm
CPH
-
STL
36h 58m
2 stops
$871Multiple Airlines
Sun, Sep 13 - Mon, Sep 21
Lufthansa Logo
6:45 pm - 11:05 pm
STL
-
CPH
21h 20m
2 stops
Lufthansa Logo
10:05 am - 11:25 pm
CPH
-
STL
20h 20m
2 stops
$874Lufthansa
Sun, Nov 8 - Sat, Nov 14

Air Canada flights from St. Louis to Copenhagen

Our best Air Canada deals on St. Louis to Copenhagen flight tickets
Air Canada
Nov 23
STL4:15 pmLambert-St Louis
14h 55m
2 stops
CPH2:10 pmKastrup Copenhagen
Nov 25
CPH11:35 amKastrup Copenhagen
31h 45m
2 stops
STL12:20 pmLambert-St Louis
$787
Air Canada
Aug 31
STL2:40 pmLambert-St Louis
13h 10m
1 stop
CPH10:50 amKastrup Copenhagen
Sep 15
CPH12:45 pmKastrup Copenhagen
14h 15m
1 stop
STL8:00 pmLambert-St Louis
$859
Air Canada
Jun 1
STL8:40 amLambert-St Louis
19h 10m
1 stop
CPH10:50 amKastrup Copenhagen
Jun 17
CPH12:15 pmKastrup Copenhagen
34h 31m
2 stops
STL3:46 pmLambert-St Louis
$899

Lufthansa flights from St. Louis to Copenhagen

Our best Lufthansa deals on St. Louis to Copenhagen flight tickets
Lufthansa
Nov 23
STL1:27 pmLambert-St Louis
15h 33m
2 stops
CPH12:00 pmKastrup Copenhagen
Nov 25
CPH7:10 amKastrup Copenhagen
13h 35m
1 stop
STL1:45 pmLambert-St Louis
$780
Lufthansa
Sep 13
STL12:59 pmLambert-St Louis
20h 26m
2 stops
CPH4:25 pmKastrup Copenhagen
Sep 21
CPH7:25 pmKastrup Copenhagen
35h 13m
2 stops
STL11:38 pmLambert-St Louis
$869
Lufthansa
Nov 8
STL6:45 pmLambert-St Louis
21h 20m
2 stops
CPH11:05 pmKastrup Copenhagen
Nov 14
CPH10:05 amKastrup Copenhagen
20h 20m
2 stops
STL11:25 pmLambert-St Louis
$874

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 May 30, 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

Mon 11/23

1:27 pm-12:00 pm

2 stops15h 33m

Kastrup Copenhagen

Wed 11/25

7:10 am-1:45 pm

1 stop13h 35m

$780

St. LouisCopenhagen

STL - CPH

STLCPH

Lambert-St Louis

Mon 11/23

4:15 pm-2:10 pm

2 stops14h 55m

Kastrup Copenhagen

Wed 11/25

11:35 am-12:20 pm

2 stops31h 45m

$787

St. LouisCopenhagen

STL - CPH

STLCPH

Lambert-St Louis

Mon 11/23

6:30 am-12:00 pm

3 stops22h 30m

Kastrup Copenhagen

Wed 11/25

11:35 am-11:25 pm

2 stops18h 50m

$801

St. LouisCopenhagen

STL - CPH

STLCPH

Lambert-St Louis

Mon 8/31

6:54 pm-8:55 am

2 stops31h 01m

Kastrup Copenhagen

Tue 9/15

12:45 pm-11:57 am

2 stops30h 12m

$829

St. LouisCopenhagen

STL - CPH

STLCPH

Lambert-St Louis

Mon 8/31

6:54 pm-8:55 am

2 stops31h 01m

Kastrup Copenhagen

Tue 9/15

12:45 pm-8:00 pm

1 stop14h 15m

$843
Quickest round-trip

St. LouisCopenhagen

STL - CPH

STLCPH

Lambert-St Louis

Mon 8/31

2:40 pm-10:50 am

1 stop13h 10m

Kastrup Copenhagen

Tue 9/15

12:45 pm-8:00 pm

1 stop14h 15m

$859

St. LouisCopenhagen

STL - CPH

STLCPH

Lambert-St Louis

Mon 9/14

2:40 pm-10:50 am

1 stop13h 10m

Kastrup Copenhagen

Mon 9/21

9:40 am-3:38 pm

2 stops36h 58m

$865

St. LouisCopenhagen

STL - CPH

STLCPH

Lambert-St Louis

Sun 9/13

12:59 pm-4:25 pm

2 stops20h 26m

Kastrup Copenhagen

Mon 9/21

7:25 pm-11:38 pm

2 stops35h 13m

$869

St. LouisCopenhagen

STL - CPH

STLCPH

Lambert-St Louis

Sun 9/13

5:30 pm-10:50 am

1 stop34h 20m

Kastrup Copenhagen

Mon 9/21

9:40 am-3:38 pm

2 stops36h 58m

$871

St. LouisCopenhagen

STL - CPH

STLCPH

Lambert-St Louis

Sun 11/8

6:45 pm-11:05 pm

2 stops21h 20m

Kastrup Copenhagen

Sat 11/14

10:05 am-11:25 pm

2 stops20h 20m

$874

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

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 $834 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 1% 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

12h 50m

Direct flights

None
The fastest flight from St. Louis to Copenhagen takes 12h 50m
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 12h 50m.

  • 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
8,010 reviews
Search British Airways flights
United AirlinesPriceFrom $592Free CancellationRating
7.4
9,766 reviews
Search United Airlines flights
DeltaPriceFrom $643Free CancellationRating
7.9
8,416 reviews
Search Delta flights
Scandinavian AirlinesPriceFrom $655Free CancellationRating
7.4
1,802 reviews
Search Scandinavian Airlines flights
American AirlinesPriceFrom $684Free CancellationRating
7.1
11,640 reviews
Search American Airlines flights
LufthansaPriceFrom $690Free CancellationRating
6.8
8,031 reviews
Search Lufthansa flights
Air CanadaPriceFrom $761Free CancellationRating
7.1
11,105 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.

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.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Mon 6/29
Mon 7/6
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to Denmark