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St. Louis

$454+ 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 1 — Jan 81
Thu 1/1
Thu 1/8
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

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

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Cheapflights Tip: The best prices from Kastrup Copenhagen to Lambert-St Louis are usually found in April or February, 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 2, 2025.

This United Airlines deal was found by Cheapflights users on 11/30. 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 12/241:05 pmCPH - STL
2 stops35h 49mUnited Airlines
Wed 1/76:40 pmSTL - CPH
2 stops34h 20mUnited Airlines
Deal found 11/30$546
This lastminute.com deal was found by Cheapflights users on 12/2. 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 lastminute.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/248:05 pmCPH - STL
2 stops48h 31mBritish Airways
Tue 1/62:54 pmSTL - CPH
2 stops37h 26mBritish Airways
Deal found 12/2$585
This United Airlines deal was found by Cheapflights users on 11/30. 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 12/246:50 amCPH - STL
1 stop14h 05mUnited Airlines
Tue 1/66:40 pmSTL - CPH
2 stops36h 25mUnited Airlines
Deal found 11/30$635
This United Airlines deal was found by Cheapflights users on 11/30. 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 12/246:50 amCPH - STL
1 stop14h 05mUnited Airlines
Mon 1/53:10 pmSTL - CPH
2 stops38h 15mUnited Airlines
Deal found 11/30$661
This ResecentrumGruppen deal was found by Cheapflights users on 11/30. 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 ResecentrumGruppen is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/246:50 amCPH - STL
1 stop14h 05mLufthansa
Wed 1/73:50 pmSTL - CPH
1 stop12h 55mLufthansa
Deal found 11/30$664
This flygcity.se deal was found by Cheapflights users on 11/30. 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 flygcity.se is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/245:55 pmCPH - STL
2 stops32h 27mBritish Airways
Mon 1/52:50 pmSTL - CPH
2 stops13h 40mBritish Airways
Deal found 11/30$666
This Delta deal was found by Cheapflights users on 12/1. 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 12/249:55 amCPH - STL
2 stops19h 21mDelta
Tue 1/611:23 amSTL - CPH
2 stops18h 47mDelta
Deal found 12/1$688
This Delta deal was found by Cheapflights users on 11/30. 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.
Tue 12/232:15 pmCPH - STL
2 stops37h 26mDelta
Mon 1/56:35 amSTL - CPH
2 stops27h 25mDelta
Deal found 11/30$694
This United Airlines deal was found by Cheapflights users on 11/30. 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 12/232:20 pmCPH - STL
1 stop30h 35mUnited Airlines
Tue 1/66:40 pmSTL - CPH
2 stops36h 25mUnited Airlines
Deal found 11/30$697
This Flightnetwork deal was found by Cheapflights users on 12/1. 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 Flightnetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/248:05 pmCPH - STL
2 stops30h 17mBritish Airways
Sun 1/42:50 pmSTL - CPH
2 stops15h 40mBritish Airways
Deal found 12/1$699

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 2, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$454
(Kiwi.com)

Popular in

July

Cheapest in

April

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. 10% potential increase in price ($70 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($15 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 2, 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

12:44 pm-11:45 am

2 stops16h 01m

$454

CopenhagenSt. Louis

CPH - STL

CPHSTL

Kastrup Copenhagen

Wed 2/4

6:50 am-11:59 pm

2 stops24h 09m

Lambert-St Louis

Sun 2/8

1:15 pm-5:35 pm

2 stops21h 20m

$493

CopenhagenSt. Louis

CPH - STL

CPHSTL

Kastrup Copenhagen

Wed 2/4

1:05 pm-11:59 pm

2 stops17h 54m

Lambert-St Louis

Sun 2/8

6:40 pm-5:35 pm

2 stops15h 55m

$493

CopenhagenSt. Louis

CPH - STL

CPHSTL

Kastrup Copenhagen

Wed 12/24

1:05 pm-5:54 pm

2 stops35h 49m

Lambert-St Louis

Wed 1/7

6:40 pm-12:00 pm

2 stops34h 20m

$546

CopenhagenSt. Louis

CPH - STL

CPHSTL

Kastrup Copenhagen

Wed 12/24

8:05 pm-1:36 pm

2 stops48h 31m

Lambert-St Louis

Tue 1/6

2:54 pm-11:20 am

2 stops37h 26m

$585

CopenhagenSt. Louis

CPH - STL

CPHSTL

Kastrup Copenhagen

Wed 12/24

6:50 am-1:55 pm

1 stop14h 05m

Lambert-St Louis

Tue 1/6

6:40 pm-2:05 pm

2 stops36h 25m

$635

CopenhagenSt. Louis

CPH - STL

CPHSTL

Kastrup Copenhagen

Wed 12/24

6:50 am-1:55 pm

1 stop14h 05m

Lambert-St Louis

Mon 1/5

3:10 pm-12:25 pm

2 stops38h 15m

$661

CopenhagenSt. Louis

CPH - STL

CPHSTL

Kastrup Copenhagen

Wed 12/24

6:50 am-1:55 pm

1 stop14h 05m

Lambert-St Louis

Wed 1/7

3:50 pm-11:45 am

1 stop12h 55m

$664

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/2

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 November 28, 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, May is the cheapest month in which you can book a flight from Copenhagen to St. Louis (average of $387). Flying from Copenhagen to St. Louis in July is currently the most expensive (average of $514). 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 2, 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
9,063 reviews

Entertainment

7.1

Comfort

7.3

Crew

8.1

Food

6.6

Overall

7.4

Boarding

7.7

Reviews

1 / 20
2.0
Mediocre

Sebrena,Oct 2025

IAH - RSW

The worst that I have ever experienced in my life so bad if it was free I'm not ever going to use your Airline again I dont believe ..... very disappointed 😞 😔0000000000000
United Airlines
7.4
Good
9,063 reviews
United Airlines
7.4
Good
9,063 reviews

Entertainment

7.1

Comfort

7.3

Crew

8.1

Food

6.6

Overall

7.4

Boarding

7.7

Reviews

1 / 20
2.0
Mediocre

Sebrena,Oct 2025

IAH - RSW

The worst that I have ever experienced in my life so bad if it was free I'm not ever going to use your Airline again I dont believe ..... very disappointed 😞 😔0000000000000
Air Canada
7.1
Good
10,496 reviews
United Airlines
7.4
Good
9,063 reviews

Entertainment

7.1

Comfort

7.3

Crew

8.1

Food

6.6

Overall

7.4

Boarding

7.7

Reviews

1 / 20
2.0
Mediocre

Sebrena,Oct 2025

IAH - RSW

The worst that I have ever experienced in my life so bad if it was free I'm not ever going to use your Airline again I dont believe ..... very disappointed 😞 😔0000000000000

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 8% 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, May is the cheapest month in which you can book a flight from Copenhagen to St. Louis (average of $387). Flying from Copenhagen to St. Louis in July is currently the most expensive (average of $514). 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

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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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 2, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$528Average$554FlexibilityNo cancel feeOn-time69%
Air CanadaCheapest$567Average$588FlexibilityNo cancel feeOn-time67%

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