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St. Louis

$353+ Cheap flights from Copenhagen (CPH) to St. Louis (STL)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 5/16. Fares are subject to change and may not be available on all flights or dates of travel.
CPH — STL
Mar 23 — Mar 301
Mon 3/23
Mon 3/30
1 adult, Economy
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Cheap flight deals from Copenhagen to St. Louis

Cheapest flights from Copenhagen to St. Louis
Explore the most affordable flight options available from Copenhagen to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on February 21, 2026.

This Travelis deal was found by Cheapflights users on 2/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Travelis is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/36:30 am
CPH
-
STL
1 stop13h 55m
Lufthansa
Wed 4/81:10 pm
STL
-
CPH
2 stops20h 15m
Lufthansa
Deal found 2/17$541
This United Airlines deal was found by Cheapflights users on 2/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/96:10 am
CPH
-
STL
2 stops18h 26m
United Airlines
Mon 4/1310:00 am
STL
-
CPH
2 stops18h 35m
United Airlines
Deal found 2/19$583
This American Airlines deal was found by Cheapflights users on 2/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/268:50 am
CPH
-
STL
2 stops17h 40m
American Airlines
Sun 5/36:55 pm
STL
-
CPH
2 stops15h 25m
American Airlines
Deal found 2/20$588
This Travelis deal was found by Cheapflights users on 2/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Travelis is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/48:50 am
CPH
-
STL
2 stops17h 52m
Finnair
Sat 4/115:21 pm
STL
-
CPH
2 stops15h 54m
Finnair
Deal found 2/18$607
This Finnair deal was found by Cheapflights users on 2/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/268:50 am
CPH
-
STL
2 stops20h 27m
Multiple Airlines
Sun 5/39:40 pm
STL
-
CPH
1 stop18h 00m
Multiple Airlines
Deal found 2/21$622

Find flight deals from Copenhagen to St. Louis

Discover tips and strategies to find the most affordable flight options for your journey from Copenhagen (CPH) to St. Louis (STL). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated February 21, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$541
(Travelis)

One-way from

$353
(Finnair)

Popular in

January

Cheapest in

April

Average price

$585
Provider with most accurate pricing for Kastrup Copenhagen-Lambert-St Louis flight deals.
Search Deals
Provider most trusted by Cheapflights users for Kastrup Copenhagen-Lambert-St Louis flights.
Search Deals
From Kastrup Copenhagen to Lambert-St Louis
Search Deals
One-way flight from Kastrup Copenhagen to Lambert-St Louis
Search Deals
Highest demand for flights based on searches. 3% potential increase in price ($22 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($11 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in February 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Copenhagen to St. Louis 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, Cheapflights users made 2,558,603 searches. Data last updated February 21, 2026.
Use the filters below to find and compare flights from Copenhagen to St. Louis that are best for you.

Fly from

Copenhagen

Fly to

St. Louis

Route

Depart

Return

Price

CopenhagenSt. Louis

CPH - STL

CPHSTL

Kastrup Copenhagen

Fri 4/3

6:30 am-1:25 pm

1 stop13h 55m

Lambert-St Louis

Wed 4/8

1:10 pm-4:25 pm

2 stops20h 15m

$541

CopenhagenSt. Louis

CPH - STL

CPHSTL

Kastrup Copenhagen

Thu 4/9

6:10 am-5:36 pm

2 stops18h 26m

Lambert-St Louis

Mon 4/13

10:00 am-11:35 am

2 stops18h 35m

$583

CopenhagenSt. Louis

CPH - STL

CPHSTL

Kastrup Copenhagen

Sun 4/26

6:20 am-1:25 pm

1 stop14h 05m

Lambert-St Louis

Sun 5/3

6:30 am-9:35 am

2 stops20h 05m

$585

CopenhagenSt. Louis

CPH - STL

CPHSTL

Kastrup Copenhagen

Sun 4/26

8:50 am-7:30 pm

2 stops17h 40m

Lambert-St Louis

Sun 5/3

8:03 pm-8:50 pm

2 stops17h 47m

$589

CopenhagenSt. Louis

CPH - STL

CPHSTL

Kastrup Copenhagen

Mon 4/6

8:50 am-7:29 pm

2 stops17h 39m

Lambert-St Louis

Mon 4/13

5:21 pm-4:50 pm

2 stops16h 29m

$589

CopenhagenSt. Louis

CPH - STL

CPHSTL

Kastrup Copenhagen

Sat 5/16

12:25 pm-10:19 pm

2 stops16h 54m

$353

CopenhagenSt. Louis

CPH - STL

CPHSTL

Kastrup Copenhagen

Sat 5/16

7:55 am-10:30 am

3 stops33h 35m

$530

CopenhagenSt. Louis

CPH - STL

CPHSTL

Kastrup Copenhagen

Sat 5/16

7:50 pm-7:30 pm

1 stop30h 40m

$680

CopenhagenSt. Louis

CPH - STL

CPHSTL

Kastrup Copenhagen

Thu 4/30

12:25 pm-10:17 pm

2 stops16h 52m

$1,849

CopenhagenSt. Louis

CPH - STL

CPHSTL

Kastrup Copenhagen

Thu 4/30

2:00 pm-9:42 am

3 stops26h 42m

$2,030

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/17

  • Most accurate provider: When it comes to deals on Copenhagen-St. Louis flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Copenhagen-St. Louis flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Copenhagen-St. Louis flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Copenhagen-St. Louis flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Copenhagen-St. Louis flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Copenhagen to St. Louis

Have a flexible travel schedule? Discover the best time to fly to St. Louis from Copenhagen with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Copenhagen to St. Louis

How far ahead should I book a flight from Copenhagen to St. Louis?

Use this chart to determine the optimal time to book a round-trip flight from Copenhagen to St. Louis. Price data was last updated on February 18, 2026.

Booking 82 days in advance of your planned departure date is, on average, the best time to get cheap flights from Copenhagen to St. Louis. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

What is the cheapest month to book a flight from Copenhagen to St. Louis?

Currently, April is the cheapest month in which you can book a flight from Copenhagen to St. Louis (average of $453). Flying from Copenhagen to St. Louis in July is currently the most expensive (average of $576). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

Reviews of airlines servicing St. Louis

Get insights into the airlines that provide service to St. Louis. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to St. Louis. Reviews last updated February 21, 2026.
See what other customers who have flown with United Airlines from Copenhagen to St. Louis have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
9,335 reviews

Overall

7.4

Entertainment

7.1

Comfort

7.3

Food

6.6

Crew

8.1

Boarding

7.7

Reviews

1 / 20
6.0
Good

Gerry,Jan 2026

YVR - DEN

Seats were uncomfortable. Second leg of my flight on United had much more comfortable seats
United Airlines
7.4
Good
9,335 reviews
United Airlines
7.4
Good
9,335 reviews

Overall

7.4

Entertainment

7.1

Comfort

7.3

Food

6.6

Crew

8.1

Boarding

7.7

Reviews

1 / 20
6.0
Good

Gerry,Jan 2026

YVR - DEN

Seats were uncomfortable. Second leg of my flight on United had much more comfortable seats

Related info for your journey

Find useful and relevant information for your journey from Copenhagen to St. Louis. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Copenhagen to St. Louis?

    Departing from Copenhagen to St. Louis will take you 13h 55m. The distance from Copenhagen to St. Louis is about 4511 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • What is the cheapest airline to fly from Copenhagen to St. Louis round-trip?

    United Airlines, at $528, was found to be the cheapest airline from Copenhagen to St. Louis.. Users have found that United Airlines is 15% cheaper than the other options available to this destination.

  • Can I find deals for flights from Copenhagen to St. Louis that include hotel bookings?

    Yes. In addition to deals on Copenhagen to St. Louis flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Copenhagen to St. Louis?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Copenhagen to St. Louis.

  • Can I find deals for business class flights from Copenhagen to St. Louis?

    Yes. Cheapflights offers flight deals from Copenhagen to St. Louis by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Copenhagen to St. Louis?

    Currently, April is the cheapest month in which you can book a flight from Copenhagen to St. Louis (average of $453). Flying from Copenhagen to St. Louis in July is currently the most expensive (average of $576). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near St. Louis?

Book flights to St. Louis if you plan to visit one of these locations
Edwardsville
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Fairview Heights
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Glencoe
Chesterfield
Alton
Farmington
Festus

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Top airline flying from Copenhagen to St. Louis

Discover the top airline that operate flights from Copenhagen to St. Louis. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated February 21, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$528Average$623FlexibilityNo cancel feeOn-time69%

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