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St. Louis

$451+ 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 6/12. Fares are subject to change and may not be available on all flights or dates of travel.
CPH — STL
May 4 — May 111
Sun 5/4
Sun 5/11
1 adult, Economy
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Cheapflights Tip: The best prices from Kastrup Copenhagen to Lambert-St Louis are usually found in September or October, booked 49 days in advance, depart on a Saturday or Thursday and return on a Tuesday

Cheap 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 April 29, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$451
(Ticket)

Popular in

December

Cheapest in

September

Average price

$484
Provider with most accurate pricing for Kastrup Copenhagen-Lambert-St Louis flight deals.
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Provider most trusted by Cheapflights users for Kastrup Copenhagen-Lambert-St Louis flights.
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From Kastrup Copenhagen to Lambert-St Louis
Search Deals
Highest demand for flights based on searches. 5% potential increase in price ($30 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($16 potential savings vs. average RT price).
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Average for round-trip flights in April 2025
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Find 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 April 29, 2025.

This Ticket deal was found by Cheapflights users on 4/29. 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.
Thu 6/127:25 pmCPH - STL
2 stops35h 29mFinnair
Sat 8/234:18 pmSTL - CPH
2 stops19h 22mFinnair
Deal found 4/29$451
This Ticket deal was found by Cheapflights users on 4/29. 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.
Thu 6/122:00 pmCPH - STL
1 stop13h 19mBritish Airways
Thu 6/198:35 amSTL - CPH
2 stops25h 20mBritish Airways
Deal found 4/29$454
This Flightsearch deal was found by Cheapflights users on 4/29. 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 Flightsearch is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/128:50 amCPH - STL
2 stops16h 41mMultiple Airlines
Thu 6/194:23 pmSTL - CPH
2 stops17h 32mMultiple Airlines
Deal found 4/29$458
This American Airlines deal was found by Cheapflights users on 4/29. 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.
Fri 6/132:00 pmCPH - STL
1 stop34h 07mAmerican Airlines
Sat 8/234:18 pmSTL - CPH
2 stops16h 57mAmerican Airlines
Deal found 4/29$484
This ResecentrumGruppen deal was found by Cheapflights users on 4/29. 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.
Fri 6/1312:25 pmCPH - STL
1 stop14h 33mAir Canada
Sat 8/231:30 pmSTL - CPH
1 stop10h 40mAir Canada
Deal found 4/29$487

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 April 29, 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

Thu 6/12

7:25 pm-11:54 pm

2 stops35h 29m

Lambert-St Louis

Sat 8/23

4:18 pm-6:40 pm

2 stops19h 22m

$451

CopenhagenSt. Louis

CPH - STL

CPHSTL

Kastrup Copenhagen

Thu 6/12

2:00 pm-8:19 pm

1 stop13h 19m

Lambert-St Louis

Thu 6/19

8:35 am-4:55 pm

2 stops25h 20m

$454

CopenhagenSt. Louis

CPH - STL

CPHSTL

Kastrup Copenhagen

Thu 6/12

8:50 am-6:31 pm

2 stops16h 41m

Lambert-St Louis

Thu 6/19

4:23 pm-4:55 pm

2 stops17h 32m

$458

CopenhagenSt. Louis

CPH - STL

CPHSTL

Kastrup Copenhagen

Fri 6/13

2:00 pm-5:07 pm

1 stop34h 07m

Lambert-St Louis

Sat 8/23

4:18 pm-4:15 pm

2 stops16h 57m

$484

CopenhagenSt. Louis

CPH - STL

CPHSTL

Kastrup Copenhagen

Fri 6/13

12:25 pm-7:58 pm

1 stop14h 33m

Lambert-St Louis

Sat 8/23

1:30 pm-7:10 am

1 stop10h 40m

$487

CopenhagenSt. Louis

CPH - STL

CPHSTL

Kastrup Copenhagen

Wed 10/1

7:20 am-8:21 pm

2 stops20h 01m

$1,178

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/29

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 April.
ProviderPrice AccuracyTrust Score*
eDreamsPrice Accuracy3 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*2 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 April 25, 2025.

Booking 49 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, August is the cheapest month in which you can book a flight from Copenhagen to St. Louis (average of $311). Flying from Copenhagen to St. Louis in March is currently the most expensive (average of $356). 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.

What is the cheapest time of day to fly from CPH to STL?

Find hourly flight availability from Copenhagen to St. Louis. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated April 29, 2025.

It’s optimal to fly from Copenhagen to St. Louis in the morning. By choosing this option you can save up to 4% on the cost of your flight, compared to a flight at noon.

Rainfall in St. Louis by month

Plan your trip to St. Louis by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in St. Louis ranges from 2.2 - 4.7 inches per month. May is typically the wettest month, when rainfall can reach 4.7 in. February is typically the driest time to visit St. Louis when rainfall is around 2.2 in.

Temperature in St. Louis by month

Plan your trip to St. Louis by taking into account the average temperature totals by month.

If weather is an important factor for your trip to St. Louis, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 80.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 32.0 F).

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 April 29, 2025.
Finnair
7.6
Good
1,275 reviews

Boarding

7.6

Crew

8.1

Entertainment

6.9

Overall

7.6

Food

6.7

Comfort

7.4

Reviews

1 / 20
4.0
Okay

Julia,Feb 2024

JFK - HEL

The bathroom was broken, AC wasn’t working, tv wasn’t working for half the flight
Finnair
7.6
Good
1,275 reviews
Finnair
7.6
Good
1,275 reviews

Boarding

7.6

Crew

8.1

Entertainment

6.9

Overall

7.6

Food

6.7

Comfort

7.4

Reviews

1 / 20
4.0
Okay

Julia,Feb 2024

JFK - HEL

The bathroom was broken, AC wasn’t working, tv wasn’t working for half the flight
American Airlines
7.2
Good
10,000 reviews
Finnair
7.6
Good
1,275 reviews

Boarding

7.6

Crew

8.1

Entertainment

6.9

Overall

7.6

Food

6.7

Comfort

7.4

Reviews

1 / 20
4.0
Okay

Julia,Feb 2024

JFK - HEL

The bathroom was broken, AC wasn’t working, tv wasn’t working for half the flight
Air Canada
7.0
Good
9,244 reviews
Finnair
7.6
Good
1,275 reviews

Boarding

7.6

Crew

8.1

Entertainment

6.9

Overall

7.6

Food

6.7

Comfort

7.4

Reviews

1 / 20
4.0
Okay

Julia,Feb 2024

JFK - HEL

The bathroom was broken, AC wasn’t working, tv wasn’t working for half the flight
British Airways
6.6
Okay
6,835 reviews
Finnair
7.6
Good
1,275 reviews

Boarding

7.6

Crew

8.1

Entertainment

6.9

Overall

7.6

Food

6.7

Comfort

7.4

Reviews

1 / 20
4.0
Okay

Julia,Feb 2024

JFK - HEL

The bathroom was broken, AC wasn’t working, tv wasn’t working for half the flight

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.

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

    Finnair, at $451, was found to be the cheapest airline from Copenhagen to St. Louis.Alternate airlines to your destination round-trip include British Airways and American Airlines. Users have found that Finnair is 17% 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, August is the cheapest month in which you can book a flight from Copenhagen to St. Louis (average of $311). Flying from Copenhagen to St. Louis in March is currently the most expensive (average of $356). 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 Copenhagen?

Book flights to Copenhagen if you plan to visit one of these locations
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Top 5 airlines flying from Copenhagen to St. Louis

Discover the top 5 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 April 29, 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapest$322Average$588FlexibilityNo cancel feeOn-time67%
DeltaCheapest$348Average$607FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$431Average$655FlexibilityNo cancel feeOn-time69%
British AirwaysCheapest$481Average$652FlexibilityNo cancel feeOn-time70%
American AirlinesCheapest$557Average$601FlexibilityNo cancel feeOn-time71%

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