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St. Louis

$346+ 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 5/10. Fares are subject to change and may not be available on all flights or dates of travel.
CPH — STL
Jan 22 — Jan 291
Thu 1/22
Thu 1/29
1 adult, Economy
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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

Best flights from Copenhagen to St. Louis
Discover carefully curated flight deals from Copenhagen to St. Louis that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated December 23, 2025.

This Travelis deal was found by Cheapflights users on 12/22. 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 1/236:05 amCPH - STL
2 stops20h 24mFinnair
Wed 1/2811:55 amSTL - CPH
2 stops23h 40mFinnair
Deal found 12/22$488
This Ticket deal was found by Cheapflights users on 12/22. 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 Ticket is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 1/236:50 amCPH - STL
1 stop14h 05mLufthansa
Wed 1/283:50 pmSTL - CPH
1 stop14h 45mLufthansa
Deal found 12/22$532
This British Airways deal was found by Cheapflights users on 12/20. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 1/156:45 amCPH - STL
2 stops19h 44mBritish Airways
Mon 1/192:54 pmSTL - CPH
2 stops16h 56mBritish Airways
Deal found 12/20$562
This Scandinavian Airlines deal was found by Cheapflights users on 12/22. 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 Scandinavian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 1/151:15 pmCPH - STL
1 stop17h 24mScandinavian Airlines
Mon 1/193:45 pmSTL - CPH
1 stop11h 55mScandinavian Airlines
Deal found 12/22$1,227
This Mytrip deal was found by Cheapflights users on 12/22. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 1/2311:10 pmCPH - STL
3 stops27h 41mMultiple Airlines
Wed 1/283:50 pmSTL - CPH
2 stops23h 20mMultiple Airlines
Deal found 12/22$1,253

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 23, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$488
(Travelis)

One-way from

$346
(Finnair)

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
One-way flight from Kastrup Copenhagen to Lambert-St Louis
Search Deals
Highest demand for flights based on searches. 8% potential increase in price ($58 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 23, 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

6:05 am-7:29 pm

2 stops20h 24m

Lambert-St Louis

Wed 1/28

11:55 am-6:35 pm

2 stops23h 40m

$488

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

$532

CopenhagenSt. Louis

CPH - STL

CPHSTL

Kastrup Copenhagen

Thu 1/15

6:45 am-7:29 pm

2 stops19h 44m

Lambert-St Louis

Mon 1/19

2:54 pm-2:50 pm

2 stops16h 56m

$562

CopenhagenSt. Louis

CPH - STL

CPHSTL

Kastrup Copenhagen

Thu 1/15

1:15 pm-11:39 pm

1 stop17h 24m

Lambert-St Louis

Mon 1/19

3:45 pm-10:40 am

1 stop11h 55m

$1,227

CopenhagenSt. Louis

CPH - STL

CPHSTL

Kastrup Copenhagen

Fri 1/23

11:10 pm-7:51 pm

3 stops27h 41m

Lambert-St Louis

Wed 1/28

3:50 pm-10:10 pm

2 stops23h 20m

$1,253

CopenhagenSt. Louis

CPH - STL

CPHSTL

Kastrup Copenhagen

Sun 5/10

8:50 am-6:17 pm

2 stops16h 27m

$346

CopenhagenSt. Louis

CPH - STL

CPHSTL

Kastrup Copenhagen

Sun 5/10

7:00 am-7:30 pm

1 stop19h 30m

$346

CopenhagenSt. Louis

CPH - STL

CPHSTL

Kastrup Copenhagen

Wed 6/10

10:20 am-7:30 pm

1 stop16h 10m

$408

CopenhagenSt. Louis

CPH - STL

CPHSTL

Kastrup Copenhagen

Mon 1/5

9:50 pm-10:33 pm

3 stops55h 43m

$869

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/21

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 19, 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.

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 December 23, 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
9,106 reviews

Overall

7.4

Boarding

7.7

Comfort

7.3

Crew

8.1

Entertainment

7.1

Food

6.6

Reviews

1 / 20
10.0
Excellent

Michelle,Dec 2025

DEN - MKE

I liked that the plane waited 5 minutes for a family whose incoming plane was late. This was the last flight of the day to MKE. Flight attendants actually checked in throughout the flight. Although, not really friendly. Happy to see screens on seat backs again. This is my first time not flying first class in over 10 years. It was economy plus.
United Airlines
7.4
Good
9,106 reviews
United Airlines
7.4
Good
9,106 reviews

Overall

7.4

Boarding

7.7

Comfort

7.3

Crew

8.1

Entertainment

7.1

Food

6.6

Reviews

1 / 20
10.0
Excellent

Michelle,Dec 2025

DEN - MKE

I liked that the plane waited 5 minutes for a family whose incoming plane was late. This was the last flight of the day to MKE. Flight attendants actually checked in throughout the flight. Although, not really friendly. Happy to see screens on seat backs again. This is my first time not flying first class in over 10 years. It was economy plus.
Air Canada
7.1
Good
10,551 reviews
United Airlines
7.4
Good
9,106 reviews

Overall

7.4

Boarding

7.7

Comfort

7.3

Crew

8.1

Entertainment

7.1

Food

6.6

Reviews

1 / 20
10.0
Excellent

Michelle,Dec 2025

DEN - MKE

I liked that the plane waited 5 minutes for a family whose incoming plane was late. This was the last flight of the day to MKE. Flight attendants actually checked in throughout the flight. Although, not really friendly. Happy to see screens on seat backs again. This is my first time not flying first class in over 10 years. It was economy plus.

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
Swansea
Fairview Heights
Maryland Heights
Collinsville
Eureka
Glencoe
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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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 23, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$528Average$554FlexibilityNo cancel feeOn-time69%
Air CanadaCheapest$567Average$588FlexibilityNo cancel feeOn-time67%

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