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St. Louis

$354+ 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 5/29. Fares are subject to change and may not be available on all flights or dates of travel.
CPH — STL
Mar 16 — Mar 231
Mon 3/16
Mon 3/23
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 14, 2026.

This United Airlines deal was found by Cheapflights users on 2/13. 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.
Sun 3/16:50 am
CPH
-
STL
1 stop14h 05m
United Airlines
Wed 3/411:25 am
STL
-
CPH
2 stops19h 40m
United Airlines
Deal found 2/13$575
This United Airlines deal was found by Cheapflights users on 2/14. 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.
Sat 2/2810:05 am
CPH
-
STL
2 stops18h 00m
United Airlines
Tue 3/37:41 am
STL
-
CPH
2 stops23h 29m
United Airlines
Deal found 2/14$580
This United Airlines deal was found by Cheapflights users on 2/13. 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.
Sat 2/2810:05 am
CPH
-
STL
2 stops17h 18m
United Airlines
Wed 3/411:25 am
STL
-
CPH
2 stops19h 40m
United Airlines
Deal found 2/13$581
This United Airlines deal was found by Cheapflights users on 2/13. 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.
Sat 2/2810:05 am
CPH
-
STL
2 stops17h 18m
United Airlines
Sun 3/14:49 pm
STL
-
CPH
2 stops17h 46m
United Airlines
Deal found 2/13$584
This United Airlines deal was found by Cheapflights users on 2/12. 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 4/910:10 am
CPH
-
STL
2 stops18h 37m
United Airlines
Mon 4/1311:15 am
STL
-
CPH
2 stops15h 15m
United Airlines
Deal found 2/12$587
This United Airlines deal was found by Cheapflights users on 2/13. 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.
Sun 4/266:20 am
CPH
-
STL
1 stop14h 05m
United Airlines
Sun 5/39:14 am
STL
-
CPH
2 stops17h 21m
United Airlines
Deal found 2/13$588
This United Airlines deal was found by Cheapflights users on 2/11. 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.
Fri 4/310:10 am
CPH
-
STL
2 stops17h 58m
United Airlines
Tue 4/711:15 am
STL
-
CPH
2 stops15h 10m
United Airlines
Deal found 2/11$589
This American Airlines deal was found by Cheapflights users on 2/14. 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 5/38:03 pm
STL
-
CPH
2 stops17h 47m
American Airlines
Deal found 2/14$590
This United Airlines deal was found by Cheapflights users on 2/14. 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.
Tue 3/3112:45 pm
CPH
-
STL
1 stop33h 39m
United Airlines
Tue 4/71:10 pm
STL
-
CPH
2 stops17h 45m
United Airlines
Deal found 2/14$595

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 14, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$575
(United Airlines)

One-way from

$354
(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 14, 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

Sun 3/1

6:50 am-1:55 pm

1 stop14h 05m

Lambert-St Louis

Wed 3/4

11:25 am-2:05 pm

2 stops19h 40m

$575

CopenhagenSt. Louis

CPH - STL

CPHSTL

Kastrup Copenhagen

Sat 2/28

10:05 am-9:05 pm

2 stops18h 00m

Lambert-St Louis

Tue 3/3

7:41 am-2:10 pm

2 stops23h 29m

$580

CopenhagenSt. Louis

CPH - STL

CPHSTL

Kastrup Copenhagen

Sun 3/1

6:50 am-1:55 pm

1 stop14h 05m

Lambert-St Louis

Wed 3/4

3:50 pm-1:35 pm

1 stop14h 45m

$581

CopenhagenSt. Louis

CPH - STL

CPHSTL

Kastrup Copenhagen

Sat 2/28

10:05 am-8:23 pm

2 stops17h 18m

Lambert-St Louis

Sun 3/1

4:49 pm-5:35 pm

2 stops17h 46m

$584

CopenhagenSt. Louis

CPH - STL

CPHSTL

Kastrup Copenhagen

Thu 4/9

10:10 am-9:47 pm

2 stops18h 37m

Lambert-St Louis

Mon 4/13

11:15 am-9:30 am

2 stops15h 15m

$587

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

10:00 am-9:35 am

2 stops16h 35m

$587

CopenhagenSt. Louis

CPH - STL

CPHSTL

Kastrup Copenhagen

Sun 4/26

12:25 pm-11:46 pm

2 stops18h 21m

Lambert-St Louis

Sun 5/3

8:03 pm-8:50 pm

2 stops17h 47m

$589

CopenhagenSt. Louis

CPH - STL

CPHSTL

Kastrup Copenhagen

Fri 5/29

6:45 am-6:29 pm

2 stops18h 44m

$354

CopenhagenSt. Louis

CPH - STL

CPHSTL

Kastrup Copenhagen

Fri 5/29

3:20 pm-11:34 pm

1 stop15h 14m

$356

CopenhagenSt. Louis

CPH - STL

CPHSTL

Kastrup Copenhagen

Sun 6/28

3:20 pm-10:37 am

1 stop26h 17m

$449

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/11

Showing 1-10 of 15 results
1
2
  • 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 13, 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.

How much does it cost to fly round-trip from Copenhagen to St. Louis?

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 14, 2026.
See what other customers who have flown with United Airlines and Air Canada 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
9,296 reviews

Food

6.6

Entertainment

7.1

Boarding

7.7

Overall

7.4

Comfort

7.3

Crew

8.1

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
9,296 reviews
United Airlines
7.4
Good
9,296 reviews

Food

6.6

Entertainment

7.1

Boarding

7.7

Overall

7.4

Comfort

7.3

Crew

8.1

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
Air Canada
7.1
Good
10,718 reviews
United Airlines
7.4
Good
9,296 reviews

Food

6.6

Entertainment

7.1

Boarding

7.7

Overall

7.4

Comfort

7.3

Crew

8.1

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 14h 05m. The distance from Copenhagen to St. Louis is about 4511 mi.

  • What are the cheapest airlines flying from Copenhagen to St. Louis round-trip?

    United Airlines, at $528, was found to be the cheapest airline from Copenhagen to St. Louis. An alternate airline flying to your destination would be Air Canada. 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
O'Fallon
Swansea
Fairview Heights
Maryland Heights
Collinsville
Eureka
Glencoe
Chesterfield
Alton
Farmington
Festus

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Copenhagen to St. Louis

See prices for flight routes from nearby airports that may be better suited for you.
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Billund to St. Louis flights

Top 2 airlines flying from Copenhagen to St. Louis

Discover the top 2 airlines 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 14, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$528Average$602FlexibilityNo cancel feeOn-time69%
Air CanadaCheapest$567Average$588FlexibilityNo cancel feeOn-time67%

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