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St. Louis

$404+ 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 10/7. Fares are subject to change and may not be available on all flights or dates of travel.
CPH — STL
août 23 — août 301
sam. 8/23
sam. 8/30
1 adult, Economy
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Cheapflights Tip: The best prices from Kastrup Copenhagen to Lambert-St Louis are usually found in April or January, 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 août 18, 2025.

Round-trip from

$448
(Gotogate)

One-way from

$404
(Kiwi.com)

Popular in

July

Cheapest in

April

Average price

$558
From Kastrup Copenhagen to Lambert-St Louis
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One-way flight from Kastrup Copenhagen to Lambert-St Louis
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Highest demand for flights based on searches. 11% potential increase in price ($69 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($15 potential savings vs. average RT price).
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Average for round-trip flights in August 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 août 18, 2025.

This Gotogate deal was found by Cheapflights users on 8/18. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 9/86:10 amCPH - STL
2 stops20h 47mAir Canada
dim. 9/141:30 pmSTL - CPH
1 stop10h 40mAir Canada
Deal found 8/18$448
This Mytrip deal was found by Cheapflights users on 8/17. 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.
dim. 8/3112:25 pmCPH - STL
1 stop14h 35mAir Canada
sam. 9/61:30 pmSTL - CPH
1 stop10h 40mAir Canada
Deal found 8/17$457
This FlightHub deal was found by Cheapflights users on 8/18. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jeu. 9/186:10 amCPH - STL
2 stops20h 47mAir Canada
lun. 9/294:05 pmSTL - CPH
1 stop11h 45mAir Canada
Deal found 8/18$512
This United Airlines deal was found by Cheapflights users on 8/17. 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.
jeu. 9/1812:35 pmCPH - STL
2 stops35h 05mUnited Airlines
lun. 9/294:05 pmSTL - CPH
1 stop11h 45mUnited Airlines
Deal found 8/17$513
This United Airlines deal was found by Cheapflights users on 8/17. 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.
dim. 8/316:05 amCPH - STL
2 stops19h 54mUnited Airlines
sam. 9/66:35 amSTL - CPH
2 stops17h 35mUnited Airlines
Deal found 8/17$514
This United Airlines deal was found by Cheapflights users on 8/17. 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.
mar. 9/1612:45 pmCPH - STL
2 stops36h 38mUnited Airlines
lun. 9/2912:25 pmSTL - CPH
2 stops16h 35mUnited Airlines
Deal found 8/17$516
This FlightHub deal was found by Cheapflights users on 8/16. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jeu. 10/96:10 amCPH - STL
2 stops20h 47mAir Canada
jeu. 10/1612:25 pmSTL - CPH
2 stops39h 25mAir Canada
Deal found 8/16$517

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 août 18, 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

lun. 9/8

6:10 am-7:57 pm

2 stops20h 47m

Lambert-St Louis

dim. 9/14

1:30 pm-7:10 am

1 stop10h 40m

$448

CopenhagenSt. Louis

CPH - STL

CPHSTL

Kastrup Copenhagen

dim. 8/31

12:25 pm-8:00 pm

1 stop14h 35m

Lambert-St Louis

sam. 9/6

1:30 pm-7:10 am

1 stop10h 40m

$457

CopenhagenSt. Louis

CPH - STL

CPHSTL

Kastrup Copenhagen

jeu. 9/18

6:10 am-7:57 pm

2 stops20h 47m

Lambert-St Louis

lun. 9/29

4:05 pm-10:50 am

1 stop11h 45m

$512

CopenhagenSt. Louis

CPH - STL

CPHSTL

Kastrup Copenhagen

jeu. 9/18

7:45 am-6:28 pm

2 stops17h 43m

Lambert-St Louis

lun. 9/29

4:55 pm-4:55 pm

2 stops17h 00m

$513

CopenhagenSt. Louis

CPH - STL

CPHSTL

Kastrup Copenhagen

mar. 10/7

1:50 pm-5:10 pm

3 stops58h 20m

$404

CopenhagenSt. Louis

CPH - STL

CPHSTL

Kastrup Copenhagen

sam. 11/29

6:55 am-5:37 pm

2 stops17h 42m

$612

CopenhagenSt. Louis

CPH - STL

CPHSTL

Kastrup Copenhagen

sam. 11/29

2:30 pm-1:55 pm

1 stop30h 25m

$614

CopenhagenSt. Louis

CPH - STL

CPHSTL

Kastrup Copenhagen

mar. 10/7

9:00 am-4:43 pm

1 stop14h 43m

$639

CopenhagenSt. Louis

CPH - STL

CPHSTL

Kastrup Copenhagen

dim. 11/30

10:15 pm-10:39 pm

2 stops31h 24m

$653

CopenhagenSt. Louis

CPH - STL

CPHSTL

Kastrup Copenhagen

dim. 11/30

6:50 am-1:55 pm

1 stop14h 05m

$699

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/18

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 August 8, 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.

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 août 18, 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
8,925 reviews

Crew

8.1

Boarding

7.7

Comfort

7.3

Food

6.6

Overall

7.4

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Thomas,Apr 2025

TPE - SFO

The boarding experience was okay. The dietary food choices were limited, the midway snacks were hard and dry. The seat was uncomfortable - stiff seat cushion, seat back kept springing back to the upright position, narrow seat width. Love the app and the ability to track my luggage. Flight crew was efficient.
United Airlines
7.4
Good
8,925 reviews
United Airlines
7.4
Good
8,925 reviews

Crew

8.1

Boarding

7.7

Comfort

7.3

Food

6.6

Overall

7.4

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Thomas,Apr 2025

TPE - SFO

The boarding experience was okay. The dietary food choices were limited, the midway snacks were hard and dry. The seat was uncomfortable - stiff seat cushion, seat back kept springing back to the upright position, narrow seat width. Love the app and the ability to track my luggage. Flight crew was efficient.
Air Canada
7.1
Good
9,992 reviews
United Airlines
7.4
Good
8,925 reviews

Crew

8.1

Boarding

7.7

Comfort

7.3

Food

6.6

Overall

7.4

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Thomas,Apr 2025

TPE - SFO

The boarding experience was okay. The dietary food choices were limited, the midway snacks were hard and dry. The seat was uncomfortable - stiff seat cushion, seat back kept springing back to the upright position, narrow seat width. Love the app and the ability to track my luggage. Flight crew was efficient.

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 20h 47m. 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 $485, 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 12% 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 St. Louis?

Book flights to St. Louis if you plan to visit one of these locations
O'Fallon
Fairview Heights
Maryland Heights
Collinsville
Eureka
St. Peters
Glencoe
Alton
Chesterfield
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 août 18, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$485Average$628FlexibilityNo cancel feeOn-time69%
Air CanadaCheapest$527Average$582FlexibilityNo cancel feeOn-time67%

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