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Cheap flights from St. Louis to Denmark from $345

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 Denmark departing on 1/3. 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 Denmark

Cheap round-trip flights

Enter your travel dates to find the best prices.
Lufthansa Logo
6:50 pm - 5:35 pmSTL  Lambert-St Louis-CPH Kastrup Copenhagen
15h 45m2 stops Chicago O'Hare Intl Munich Franz Josef Strauss
Lufthansa Logo
7:15 am - 1:45 pmCPH  Kastrup Copenhagen-STL Lambert-St Louis
13h 30m1 stop Frankfurt am Main
$796Lufthansa
Mon, Nov 9 - Wed, Nov 18
Lufthansa Logo
6:50 pm - 5:35 pmSTL  Lambert-St Louis-CPH Kastrup Copenhagen
15h 45m2 stops Chicago O'Hare Intl Munich Franz Josef Strauss
Lufthansa Logo
10:05 am - 9:52 pmCPH  Kastrup Copenhagen-STL Lambert-St Louis
18h 47m2 stops Frankfurt am Main Newark
$803Lufthansa
Mon, Nov 9 - Wed, Nov 18
Air Canada Logo
5:34 pm - 10:20 amSTL  Lambert-St Louis-CPH Kastrup Copenhagen
57h 46m2 stops Chicago O'Hare Intl Toronto Pearson Intl
Air Canada Logo
9:50 am - 3:26 pmCPH  Kastrup Copenhagen-STL Lambert-St Louis
36h 36m2 stops Zurich Toronto Pearson Intl
$814Air Canada
Sun, Jan 17 - Thu, Jan 21
United Airlines Logo
1:08 pm - 12:25 pmSTL  Lambert-St Louis-CPH Kastrup Copenhagen
16h 17m2 stops Chicago O'Hare Intl Munich Franz Josef Strauss
United Airlines Logo
7:15 am - 11:09 pmCPH  Kastrup Copenhagen-STL Lambert-St Louis
22h 54m2 stops Frankfurt am Main Chicago O'Hare Intl
$839United Airlines
Sun, Jan 17 - Thu, Jan 21
United Airlines Logo
3:40 pm - 1:30 pmSTL  Lambert-St Louis-CPH Kastrup Copenhagen
14h 50m1 stop Frankfurt am Main
United Airlines Logo
10:05 am - 9:13 pmCPH  Kastrup Copenhagen-STL Lambert-St Louis
18h 08m2 stops Frankfurt am Main Chicago O'Hare Intl
$847United Airlines
Sun, Jan 17 - Thu, Jan 21
Multiple Airlines Logo
12:10 pm - 8:00 pmSTL  Lambert-St Louis-CPH Kastrup Copenhagen
24h 50m3 stops Montreal Pierre Elliott Trudeau Intl Frankfurt am Main Milan Linate
Multiple Airlines Logo
8:30 pm - 6:41 pmCPH  Kastrup Copenhagen-STL Lambert-St Louis
29h 11m3 stops Milan Linate Frankfurt am Main Montreal Pierre Elliott Trudeau Intl
$869Multiple Airlines
Wed, Sep 30 - Tue, Oct 6
Scandinavian Airlines Logo
12:00 pm - 10:15 amSTL  Lambert-St Louis-CPH Kastrup Copenhagen
15h 15m1 stop Atlanta Hartsfield-Jackson
Scandinavian Airlines Logo
1:35 pm - 11:42 pmCPH  Kastrup Copenhagen-STL Lambert-St Louis
17h 07m1 stop Atlanta Hartsfield-Jackson
$892Scandinavian Airlines
Mon, Sep 14 - Mon, Sep 21
Multiple Airlines Logo
8:55 am - 10:50 amSTL  Lambert-St Louis-CPH Kastrup Copenhagen
18h 55m1 stop Toronto Pearson Intl
Multiple Airlines Logo
7:15 am - 7:48 pmCPH  Kastrup Copenhagen-STL Lambert-St Louis
19h 33m2 stops London Heathrow Dallas/Fort Worth
$902Multiple Airlines
Wed, Sep 30 - Tue, Oct 6
Air Canada Logo
12:10 pm - 10:50 amSTL  Lambert-St Louis-CPH Kastrup Copenhagen
15h 40m2 stops Montreal Pierre Elliott Trudeau Intl Toronto Pearson Intl
Air Canada Logo
12:45 pm - 11:57 amCPH  Kastrup Copenhagen-STL Lambert-St Louis
30h 12m2 stops Toronto Pearson Intl Chicago O'Hare Intl
$909Air Canada
Wed, Sep 9 - Tue, Sep 15
Scandinavian Airlines Logo
12:00 pm - 10:15 amSTL  Lambert-St Louis-CPH Kastrup Copenhagen
15h 15m1 stop Atlanta Hartsfield-Jackson
Scandinavian Airlines Logo
1:35 pm - 11:42 pmCPH  Kastrup Copenhagen-STL Lambert-St Louis
17h 07m1 stop Atlanta Hartsfield-Jackson
$920Scandinavian Airlines
Mon, Sep 14 - Mon, Sep 21

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Air Canada flights from St. Louis to Denmark

Our best Air Canada deals on St. Louis to Denmark flight tickets
Air Canada
Jan 17
STL5:34 pmLambert-St Louis
57h 46m
2 stops
CPH10:20 amKastrup Copenhagen
Jan 21
CPH9:50 amKastrup Copenhagen
36h 36m
2 stops
STL3:26 pmLambert-St Louis
$814
Air Canada
Sep 9
STL12:10 pmLambert-St Louis
15h 40m
2 stops
CPH10:50 amKastrup Copenhagen
Sep 15
CPH12:45 pmKastrup Copenhagen
30h 12m
2 stops
STL11:57 amLambert-St Louis
$909
Air Canada
Aug 17
STL8:55 amLambert-St Louis
18h 55m
1 stop
CPH10:50 amKastrup Copenhagen
Aug 24
CPH10:30 amKastrup Copenhagen
39h 12m
2 stops
STL6:42 pmLambert-St Louis
$924

Scandinavian Airlines flights from St. Louis to Denmark

Our best Scandinavian Airlines deals on St. Louis to Denmark flight tickets
Scandinavian Airlines
Sep 14
STL12:00 pmLambert-St Louis
15h 15m
1 stop
CPH10:15 amKastrup Copenhagen
Sep 21
CPH1:35 pmKastrup Copenhagen
17h 07m
1 stop
STL11:42 pmLambert-St Louis
$892
Scandinavian Airlines
Sep 14
STL12:00 pmLambert-St Louis
15h 15m
1 stop
CPH10:15 amKastrup Copenhagen
Sep 21
CPH1:35 pmKastrup Copenhagen
17h 07m
1 stop
STL11:42 pmLambert-St Louis
$920

momondo Fare Finder

 
Customize your flight search to find flights from St. Louis to Denmark 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 August 9, 2026.
Use the filters below to find and compare flights from St. Louis to Denmark that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip
Quickest round-trip

St. LouisCopenhagen

STL Lambert-St Louis - CPH Kastrup Copenhagen

STLCPH

Lambert-St Louis

Mon 11/9

6:50 pm-5:35 pm

2 stops15h 45m

Kastrup Copenhagen

Wed 11/18

7:15 am-1:45 pm

1 stop13h 30m

$796

St. LouisCopenhagen

STL Lambert-St Louis - CPH Kastrup Copenhagen

STLCPH

Lambert-St Louis

Mon 11/9

6:50 pm-5:35 pm

2 stops15h 45m

Kastrup Copenhagen

Wed 11/18

10:05 am-9:52 pm

2 stops18h 47m

$803

St. LouisCopenhagen

STL Lambert-St Louis - CPH Kastrup Copenhagen

STLCPH

Lambert-St Louis

Sun 1/17

5:34 pm-10:20 am

2 stops57h 46m

Kastrup Copenhagen

Thu 1/21

9:50 am-3:26 pm

2 stops36h 36m

$814

St. LouisCopenhagen

STL Lambert-St Louis - CPH Kastrup Copenhagen

STLCPH

Lambert-St Louis

Sun 1/17

1:08 pm-12:25 pm

2 stops16h 17m

Kastrup Copenhagen

Thu 1/21

7:15 am-11:09 pm

2 stops22h 54m

$839

St. LouisCopenhagen

STL Lambert-St Louis - CPH Kastrup Copenhagen

STLCPH

Lambert-St Louis

Sun 1/17

3:40 pm-1:30 pm

1 stop14h 50m

Kastrup Copenhagen

Thu 1/21

10:05 am-9:13 pm

2 stops18h 08m

$847

St. LouisCopenhagen

STL Lambert-St Louis - CPH Kastrup Copenhagen

STLCPH

Lambert-St Louis

Wed 9/30

12:10 pm-8:00 pm

3 stops24h 50m

Kastrup Copenhagen

Tue 10/6

8:30 pm-6:41 pm

3 stops29h 11m

$869

St. LouisCopenhagen

STL Lambert-St Louis - CPH Kastrup Copenhagen

STLCPH

Lambert-St Louis

Mon 9/14

12:00 pm-10:15 am

1 stop15h 15m

Kastrup Copenhagen

Mon 9/21

1:35 pm-11:42 pm

1 stop17h 07m

$892

St. LouisCopenhagen

STL Lambert-St Louis - CPH Kastrup Copenhagen

STLCPH

Lambert-St Louis

Wed 9/30

8:55 am-10:50 am

1 stop18h 55m

Kastrup Copenhagen

Tue 10/6

7:15 am-7:48 pm

2 stops19h 33m

$902

St. LouisCopenhagen

STL Lambert-St Louis - CPH Kastrup Copenhagen

STLCPH

Lambert-St Louis

Wed 9/9

12:10 pm-10:50 am

2 stops15h 40m

Kastrup Copenhagen

Tue 9/15

12:45 pm-11:57 am

2 stops30h 12m

$909

St. LouisCopenhagen

STL Lambert-St Louis - CPH Kastrup Copenhagen

STLCPH

Lambert-St Louis

Mon 9/14

12:00 pm-10:15 am

1 stop15h 15m

Kastrup Copenhagen

Mon 9/21

1:35 pm-11:42 pm

1 stop17h 07m

$920

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 Denmark from

How to get the cheapest flight ticket from St. Louis to Denmark

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 Denmark?

In general, February is the cheapest month to fly from St. Louis to Denmark. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $523. If you aren’t able to travel to Denmark 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 $680.

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

You could potentially save up to 24% on your flight if you consider stops on a St. Louis to Denmark flight.

Cheap St. Louis to Denmark flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from St. Louis to Denmark

Fastest flight time

14h 41m

Direct flights

None
The fastest flight from St. Louis to Denmark takes 14h 41m
There are no direct flights from St. Louis to Denmark. There are no popular flight routes from St. Louis to Denmark.
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Frequently asked questions about flying from St. Louis to Denmark

  • When did momondo last update prices for flights from Lambert-St Louis Airport to Denmark?

    Prices for flights from Lambert-St Louis Airport to Denmark were last updated today.

  • How many operators does momondo search for flights from Lambert-St Louis Airport to Denmark?

  • How old do you have to be to fly from Lambert-St Louis Airport to Denmark?

    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 Denmark.

  • What documentation or ID do you need to fly to Denmark?

    The necessary travel and health documents for your Denmark trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

Best airlines flying from St. Louis to Denmark

Compare and see reviews for airlines that fly from St. Louis to Denmark with momondo
Airline
Rating
Free Cancellation
Price
DeltaPriceFrom $406Free CancellationRating
7.8
8,497 reviews
Search Delta flights
United AirlinesPriceFrom $592Free CancellationRating
7.4
10,089 reviews
Search United Airlines flights
LufthansaPriceFrom $690Free CancellationRating
6.8
8,175 reviews
Search Lufthansa flights
American AirlinesPriceFrom $693Free CancellationRating
7.1
11,892 reviews
Search American Airlines flights
Air CanadaPriceFrom $734Free CancellationRating
7.1
11,455 reviews
Search Air Canada flights
Scandinavian AirlinesPriceFrom $769Free CancellationRating
7.4
1,932 reviews
Search Scandinavian Airlines flights

Why use momondo?

Why should I use momondo to find a flight deal from St. Louis to Denmark?

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from St. Louis to Denmark for you.

Can I find flights from St. Louis to Denmark with flexible booking policies on momondo?

Yes. momondo allows you to filter the results for St. Louis to Denmark flights to just show those with flexible booking policies.

How can momondo help me find flights from St. Louis to Denmark?

Once you have performed a search for St. Louis to Denmark flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

I’m not ready to book a flight from St. Louis to Denmark right now. Can momondo alert me if prices change?

Yes momondo offers price alerts on flights to Denmark from St. Louis. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

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