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St. Louis

$533+ Cheap flights from Copenhagen (CPH) to St. Louis (STL)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 1/23. Fares are subject to change and may not be available on all flights or dates of travel.
CPH — STL
Jan 8 — Jan 151
Thu 1/8
Thu 1/15
1 adult, Economy
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Find cheap flights from Copenhagen to St. Louis with Cheapflights

1. Tell us where you want to go

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Cheapflights Tip: The best prices from Kastrup Copenhagen to Lambert-St Louis are usually found in February or April, booked 82 days in advance, depart on a Saturday or Thursday and return on a Tuesday

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 December 9, 2025.

This United Airlines deal was found by Cheapflights users on 12/7. 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.
Wed 12/176:55 amCPH - STL
2 stops15h 45mUnited Airlines
Thu 1/18:15 amSTL - CPH
2 stops20h 10mUnited Airlines
Deal found 12/7$807
This United Airlines deal was found by Cheapflights users on 12/7. 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 12/196:55 amCPH - STL
2 stops17h 59mUnited Airlines
Fri 1/98:30 amSTL - CPH
2 stops22h 35mUnited Airlines
Deal found 12/7$909
This United Airlines deal was found by Cheapflights users on 12/8. 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.
Wed 12/176:55 amCPH - STL
2 stops15h 45mUnited Airlines
Sat 1/36:35 pmSTL - CPH
2 stops39h 55mUnited Airlines
Deal found 12/8$994
This Expedia deal was found by Cheapflights users on 12/7. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/196:20 pmCPH - STL
2 stops32h 02mMultiple Airlines
Fri 1/93:50 pmSTL - CPH
1 stop13h 10mMultiple Airlines
Deal found 12/7$1,268
This Gurufare deal was found by Cheapflights users on 12/7. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/2112:45 pmCPH - STL
2 stops34h 42mLufthansa
Sat 1/31:05 pmSTL - CPH
2 stops16h 20mLufthansa
Deal found 12/7$1,346
This Cheapflightsfares deal was found by Cheapflights users on 12/8. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/176:50 amCPH - STL
1 stop14h 05mLufthansa
Thu 1/16:35 pmSTL - CPH
2 stops21h 50mLufthansa
Deal found 12/8$1,477
This Delta deal was found by Cheapflights users on 12/7. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/176:45 amCPH - STL
2 stops23h 44mDelta
Sat 1/312:55 pmSTL - CPH
1 stop14h 45mDelta
Deal found 12/7$1,647

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 December 9, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$533
(ResecentrumGruppen)

Popular in

July

Cheapest in

February

Average price

$623
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
Highest demand for flights based on searches. 9% potential increase in price ($59 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($14 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
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 December 9, 2025.
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 1/23

6:50 am-1:55 pm

1 stop14h 05m

Lambert-St Louis

Wed 1/28

3:50 pm-1:35 pm

1 stop14h 45m

$533

CopenhagenSt. Louis

CPH - STL

CPHSTL

Kastrup Copenhagen

Thu 1/22

7:05 am-10:58 pm

2 stops22h 53m

Lambert-St Louis

Mon 1/26

3:11 pm-2:00 pm

2 stops15h 49m

$570

CopenhagenSt. Louis

CPH - STL

CPHSTL

Kastrup Copenhagen

Thu 1/8

6:45 am-9:51 pm

2 stops22h 06m

Lambert-St Louis

Thu 1/15

11:27 am-2:25 pm

2 stops19h 58m

$573

CopenhagenSt. Louis

CPH - STL

CPHSTL

Kastrup Copenhagen

Sun 1/11

11:50 am-10:51 am

2 stops30h 01m

Lambert-St Louis

Mon 1/19

1:35 pm-5:25 pm

2 stops20h 50m

$573

CopenhagenSt. Louis

CPH - STL

CPHSTL

Kastrup Copenhagen

Tue 1/13

6:50 am-10:58 pm

2 stops23h 08m

Lambert-St Louis

Fri 1/16

3:50 pm-6:15 pm

1 stop19h 25m

$575

CopenhagenSt. Louis

CPH - STL

CPHSTL

Kastrup Copenhagen

Sun 1/11

12:45 pm-10:51 am

2 stops29h 06m

Lambert-St Louis

Sun 1/18

1:35 pm-7:30 pm

2 stops22h 55m

$612

CopenhagenSt. Louis

CPH - STL

CPHSTL

Kastrup Copenhagen

Sun 1/11

2:30 pm-2:30 pm

2 stops31h 00m

Lambert-St Louis

Thu 1/15

9:57 am-12:00 pm

2 stops19h 03m

$638

CopenhagenSt. Louis

CPH - STL

CPHSTL

Kastrup Copenhagen

Sun 1/11

2:30 pm-2:30 pm

2 stops31h 00m

Lambert-St Louis

Sat 1/17

1:15 pm-1:45 pm

2 stops17h 30m

$638

CopenhagenSt. Louis

CPH - STL

CPHSTL

Kastrup Copenhagen

Sun 1/11

2:30 pm-2:30 pm

2 stops31h 00m

Lambert-St Louis

Fri 1/16

3:50 pm-6:15 pm

1 stop19h 25m

$638

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/8

Compare providers for flights from Copenhagen to St. Louis

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Copenhagen to St. Louis in December.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Copenhagen-St. Louis flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Copenhagen-St. Louis flight deals on Cheapflights vs. eDreams >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 eDreams the most. eDreams 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 December 5, 2025.

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, February is the cheapest month in which you can book a flight from Copenhagen to St. Louis (average of $417). Flying from Copenhagen to St. Louis in July is currently the most expensive (average of $515). 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 December 9, 2025.
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
9,089 reviews

Entertainment

7.1

Crew

8.1

Comfort

7.3

Overall

7.4

Food

6.6

Boarding

7.7

Reviews

1 / 20
8.0
Excellent

Anonymous,Dec 2025

AMS - EWR

It was good! The first 3/4 of the trip was uncomfortably cold. Only one option for lunch that I didn’t enjoy (vegetarian).
United Airlines
7.4
Good
9,089 reviews
United Airlines
7.4
Good
9,089 reviews

Entertainment

7.1

Crew

8.1

Comfort

7.3

Overall

7.4

Food

6.6

Boarding

7.7

Reviews

1 / 20
8.0
Excellent

Anonymous,Dec 2025

AMS - EWR

It was good! The first 3/4 of the trip was uncomfortably cold. Only one option for lunch that I didn’t enjoy (vegetarian).
Air Canada
7.1
Good
10,514 reviews
United Airlines
7.4
Good
9,089 reviews

Entertainment

7.1

Crew

8.1

Comfort

7.3

Overall

7.4

Food

6.6

Boarding

7.7

Reviews

1 / 20
8.0
Excellent

Anonymous,Dec 2025

AMS - EWR

It was good! The first 3/4 of the trip was uncomfortably cold. Only one option for lunch that I didn’t enjoy (vegetarian).

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. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • 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 10% cheaper than the other options available to this destination.

  • What are the cheapest airlines to fly from Copenhagen to St. Louis one-way?

    The cheapest airlines for a one-way flight from Copenhagen to St. Louis are Lufthansa ($455), British Airways ($519), and Delta ($650).

  • 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, February is the cheapest month in which you can book a flight from Copenhagen to St. Louis (average of $417). Flying from Copenhagen to St. Louis in July is currently the most expensive (average of $515). 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
Fairview Heights
Maryland Heights
Collinsville
Swansea
Eureka
Glencoe
St. Peters
Chesterfield
Alton
Farmington
Festus

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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 December 9, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$528Average$554FlexibilityNo cancel feeOn-time69%
Air CanadaCheapest$567Average$588FlexibilityNo cancel feeOn-time67%

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