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Cheap flights from St. Louis to Denmark from $333

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 8/26. 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.
Multiple Airlines Logo
6:29 am - 10:10 amSTL  Lambert-St Louis-CPH Kastrup Copenhagen
20h 41m1 stop Seattle/Tacoma Intl
Multiple Airlines Logo
1:05 pm - 11:59 pmCPH  Kastrup Copenhagen-STL Lambert-St Louis
17h 54m1 stop Seattle/Tacoma Intl
$784Multiple Airlines
Tue, Sep 22 - Tue, Oct 6
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
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
11:25 am - 11:25 amSTL  Lambert-St Louis-CPH Kastrup Copenhagen
17h 00m2 stops Chicago O'Hare Intl Brussels Bruxelles-National
United Airlines Logo
10:05 am - 7:29 pmCPH  Kastrup Copenhagen-STL Lambert-St Louis
16h 24m2 stops Frankfurt am Main Chicago O'Hare Intl
$840United Airlines
Sun, Jan 17 - Thu, Jan 21
Multiple Airlines Logo
4:05 pm - 10:20 amSTL  Lambert-St Louis-CPH Kastrup Copenhagen
11h 15m1 stop Toronto Pearson Intl
Multiple Airlines Logo
9:50 am - 3:26 pmCPH  Kastrup Copenhagen-STL Lambert-St Louis
36h 36m2 stops Zurich Toronto Pearson Intl
$859Multiple Airlines
Thu, Jan 14 - Tue, Jan 19
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
Air Canada Logo
12:10 pm - 10:50 amSTL  Lambert-St Louis-CPH Kastrup Copenhagen
39h 40m2 stops Montreal Pierre Elliott Trudeau Intl Toronto Pearson Intl
Air Canada Logo
9:40 am - 6:41 pmCPH  Kastrup Copenhagen-STL Lambert-St Louis
16h 01m2 stops Zurich Montreal Pierre Elliott Trudeau Intl
$913Air Canada
Sun, Sep 6 - Wed, Sep 9
Scandinavian Airlines Logo
2:30 pm - 10:15 amSTL  Lambert-St Louis-CPH Kastrup Copenhagen
12h 45m1 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
Scandinavian Airlines Logo
2:30 pm - 10:15 amSTL  Lambert-St Louis-CPH Kastrup Copenhagen
12h 45m1 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
$921Scandinavian Airlines
Mon, Sep 14 - Mon, Sep 21

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United Airlines flights from St. Louis to Denmark

Our best United Airlines deals on St. Louis to Denmark flight tickets
United Airlines
Jan 17
STL11:25 amLambert-St Louis
17h 00m
2 stops
CPH11:25 amKastrup Copenhagen
Jan 21
CPH10:05 amKastrup Copenhagen
16h 24m
2 stops
STL7:29 pmLambert-St Louis
$840
United Airlines
Jan 17
STL3:40 pmLambert-St Louis
14h 50m
1 stop
CPH1:30 pmKastrup Copenhagen
Jan 21
CPH10:05 amKastrup Copenhagen
18h 08m
2 stops
STL9:13 pmLambert-St Louis
$847
United Airlines
Nov 9
STL6:50 pmLambert-St Louis
32h 15m
2 stops
CPH10:05 amKastrup Copenhagen
Nov 18
CPH11:35 amKastrup Copenhagen
31h 35m
2 stops
STL12:10 pmLambert-St Louis
$850

Lufthansa flights from St. Louis to Denmark

Our best Lufthansa deals on St. Louis to Denmark flight tickets
Lufthansa
Nov 9
STL6:50 pmLambert-St Louis
15h 45m
2 stops
CPH5:35 pmKastrup Copenhagen
Nov 18
CPH7:15 amKastrup Copenhagen
13h 30m
1 stop
STL1:45 pmLambert-St Louis
$796
Lufthansa
Nov 9
STL6:50 pmLambert-St Louis
15h 45m
2 stops
CPH5:35 pmKastrup Copenhagen
Nov 18
CPH10:05 amKastrup Copenhagen
18h 47m
2 stops
STL9:52 pmLambert-St Louis
$803
Lufthansa
Nov 9
STL6:50 pmLambert-St Louis
15h 45m
2 stops
CPH5:35 pmKastrup Copenhagen
Nov 18
CPH7:15 amKastrup Copenhagen
13h 30m
1 stop
STL1:45 pmLambert-St Louis
$805

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 15, 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

St. LouisCopenhagen

STL Lambert-St Louis - CPH Kastrup Copenhagen

STLCPH

Lambert-St Louis

Tue 9/22

6:29 am-10:10 am

1 stop20h 41m

Kastrup Copenhagen

Tue 10/6

1:05 pm-11:59 pm

1 stop17h 54m

$784
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

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

11:25 am-11:25 am

2 stops17h 00m

Kastrup Copenhagen

Thu 1/21

10:05 am-7:29 pm

2 stops16h 24m

$840

St. LouisCopenhagen

STL Lambert-St Louis - CPH Kastrup Copenhagen

STLCPH

Lambert-St Louis

Thu 1/14

4:05 pm-10:20 am

1 stop11h 15m

Kastrup Copenhagen

Tue 1/19

9:50 am-3:26 pm

2 stops36h 36m

$859

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

Sun 9/6

12:10 pm-10:50 am

2 stops39h 40m

Kastrup Copenhagen

Wed 9/9

9:40 am-6:41 pm

2 stops16h 01m

$913

St. LouisCopenhagen

STL Lambert-St Louis - CPH Kastrup Copenhagen

STLCPH

Lambert-St Louis

Mon 9/14

2:30 pm-10:15 am

1 stop12h 45m

Kastrup Copenhagen

Mon 9/21

1:35 pm-11:42 pm

1 stop17h 07m

$920

St. LouisCopenhagen

STL Lambert-St Louis - CPH Kastrup Copenhagen

STLCPH

Lambert-St Louis

Mon 9/14

2:30 pm-10:15 am

1 stop12h 45m

Kastrup Copenhagen

Mon 9/21

1:35 pm-11:42 pm

1 stop17h 07m

$921

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
8,508 reviews
Search Delta flights
United AirlinesPriceFrom $592Free CancellationRating
7.4
10,110 reviews
Search United Airlines flights
LufthansaPriceFrom $690Free CancellationRating
6.8
8,195 reviews
Search Lufthansa flights
American AirlinesPriceFrom $693Free CancellationRating
7.1
11,941 reviews
Search American Airlines flights
Air CanadaPriceFrom $734Free CancellationRating
7.1
11,479 reviews
Search Air Canada flights
Scandinavian AirlinesPriceFrom $769Free CancellationRating
7.4
1,951 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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