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

Finnair, at $518, was found to be the cheapest airline from Copenhagen to St. Louis.Alternate airlines to your destination round-trip include British Airways and United Airlines. Users have found that Finnair is 4% 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 ($582), Austrian Airlines ($1,151), and Delta ($1,512).

What is the cheapest day to fly from Copenhagen to St. Louis?

Travelers seeking maximum savings on their Copenhagen to St. Louis flight should consider departing on Sunday mornings when fares are most often at their lowest. Wednesday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

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.

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).

What is the cheapest day to fly round-trip from Copenhagen to St. Louis?

Users have found that flying from Copenhagen to St. Louis on a Tuesday typically leans towards higher prices. However, this doesn’t mean you still can’t find a deal. Flexibility with other aspects of your flight can still land a great price for your trip.

How far in advance should I book a flight from Copenhagen to St. Louis?

To save up to 90% on this flight, we recommend booking at least 50 days prior to travel. The price may fluctuate and will likely increase closer to your departure date. Users on Cheapflights have found tickets from Copenhagen to St. Louis from $486 1-2 weeks out and tickets from $705 for flights departing within the next 72 hours.

What is the cheapest month to fly from Copenhagen to St. Louis?

The best pricing can be found in the month of April. Prices to St. Louis from Copenhagen average $542. You can even find prices in April for less than $542, as users have found deals to St. Louis from as low as $428. The month of December appears to be one of the more expensive times to travel to St. Louis from Copenhagen. Flying in the targeted month can save you up to 31%.

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

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.

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.

$469+ Flights from Copenhagen to St. Louis

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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 April or September, booked 49 days in advance, depart on a Saturday or Thursday and return on a Tuesday

Cheap flight deals from Copenhagen to St. Louis

Round-trip from	$518 (Travelis)
One-way from	$469 (Kiwi.com)
Popular in	December
Cheapest in	April
Average price	$662

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. 6% potential increase in price ($36 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 July 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 July 3, 2025.

Sat 8/168:00 pmCPH - STL

2 stops29h 29mFinnair

Sat 8/234:19 pmSTL - CPH

2 stops19h 21mFinnair

Deal found 7/2

$518

Sun 8/178:50 amCPH - STL

2 stops17h 39mBritish Airways

Sat 8/231:01 pmSTL - CPH

2 stops15h 14mBritish Airways

Deal found 7/1

$532

Thu 12/42:25 pmCPH - STL

2 stops32h 04mUnited Airlines

Mon 12/83:15 pmSTL - CPH

2 stops14h 20mUnited Airlines

Deal found 7/2

$537

Sun 8/1712:20 pmCPH - STL

1 stop18h 02mVirgin Atlantic

Sat 8/233:30 pmSTL - CPH

1 stop11h 35mVirgin Atlantic

Deal found 7/1

$540

Thu 12/46:25 amCPH - STL

2 stops18h 50mAmerican Airlines

Mon 12/84:39 pmSTL - CPH

2 stops15h 11mAmerican Airlines

Deal found 6/30

$547

Sun 8/1712:20 pmCPH - STL

1 stop18h 02mDelta

Sun 8/247:00 amSTL - CPH

2 stops16h 30mDelta

Deal found 7/3

$550

Sun 8/179:20 amCPH - STL

2 stops18h 13mMultiple Airlines

Sat 8/235:25 pmSTL - CPH

2 stops16h 25mMultiple Airlines

Deal found 7/1

$582

Sun 8/179:20 amCPH - STL

2 stops18h 13mKLM

Sat 8/233:30 pmSTL - CPH

1 stop11h 35mKLM

Deal found 7/1

$585

Thu 12/41:15 pmCPH - STL

1 stop14h 34mScandinavian Airlines

Mon 12/81:30 pmSTL - CPH

1 stop14h 10mScandinavian Airlines

Deal found 6/30

$822

Sun 8/1712:25 pmCPH - STL

1 stop14h 35mAir Canada

Sat 8/231:30 pmSTL - CPH

1 stop10h 40mAir Canada

Deal found 7/1

$855

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 July 3, 2025.

Sat 8/168:00 pmCPH - STL

2 stops29h 29mFinnair

Sat 8/234:19 pmSTL - CPH

2 stops19h 21mFinnair

Deal found 7/2

$518

Sun 8/178:50 amCPH - STL

2 stops17h 39mBritish Airways

Sat 8/231:01 pmSTL - CPH

2 stops15h 14mBritish Airways

Deal found 7/1

$532

Thu 12/42:25 pmCPH - STL

2 stops32h 04mUnited Airlines

Mon 12/83:15 pmSTL - CPH

2 stops14h 20mUnited Airlines

Deal found 7/2

$537

Sun 8/1712:20 pmCPH - STL

1 stop18h 02mVirgin Atlantic

Sat 8/233:30 pmSTL - CPH

1 stop11h 35mVirgin Atlantic

Deal found 7/1

$540

Thu 12/46:25 amCPH - STL

2 stops18h 50mAmerican Airlines

Mon 12/84:39 pmSTL - CPH

2 stops15h 11mAmerican Airlines

Deal found 6/30

$547

Sun 8/1712:20 pmCPH - STL

1 stop18h 02mDelta

Sun 8/247:00 amSTL - CPH

2 stops16h 30mDelta

Deal found 7/3

$550

Sun 8/179:20 amCPH - STL

2 stops18h 13mMultiple Airlines

Sat 8/235:25 pmSTL - CPH

2 stops16h 25mMultiple Airlines

Deal found 7/1

$582

Sun 8/179:20 amCPH - STL

2 stops18h 13mKLM

Sat 8/233:30 pmSTL - CPH

1 stop11h 35mKLM

Deal found 7/1

$585

Thu 12/41:15 pmCPH - STL

1 stop14h 34mScandinavian Airlines

Mon 12/81:30 pmSTL - CPH

1 stop14h 10mScandinavian Airlines

Deal found 6/30

$822

Sun 8/1712:25 pmCPH - STL

1 stop14h 35mAir Canada

Sat 8/231:30 pmSTL - CPH

1 stop10h 40mAir Canada

Deal found 7/1

$855

Last-minute flights from Copenhagen to St. Louis
Discover last-minute flight deals from Copenhagen to St. Louis. Data last updated July 3, 2025 and is based on user searches.

Sat 8/168:00 pmCPH - STL

2 stops29h 29mFinnair

Sat 8/234:19 pmSTL - CPH

2 stops19h 21mFinnair

Deal found 7/2

$518

Sat 8/162:00 pmCPH - STL

1 stop29h 35mAmerican Airlines

Sat 8/234:54 pmSTL - CPH

1 stop11h 21mAmerican Airlines

Deal found 7/2

$713

Sun 8/178:50 amCPH - STL

2 stops17h 39mBritish Airways

Sat 8/231:01 pmSTL - CPH

2 stops15h 14mBritish Airways

Deal found 7/1

$532

Sun 8/1712:20 pmCPH - STL

1 stop18h 02mVirgin Atlantic

Sat 8/233:30 pmSTL - CPH

1 stop11h 35mVirgin Atlantic

Deal found 7/1

$540

Sun 8/179:00 amCPH - STL

2 stops15h 54mDelta

Sun 8/247:00 amSTL - CPH

2 stops16h 30mDelta

Deal found 7/3

$550

Sun 8/176:50 amCPH - STL

2 stops19h 41mUnited Airlines

Sun 8/246:35 amSTL - CPH

2 stops17h 35mUnited Airlines

Deal found 7/3

$560

Sun 8/179:20 amCPH - STL

2 stops18h 13mMultiple Airlines

Sat 8/235:25 pmSTL - CPH

2 stops16h 25mMultiple Airlines

Deal found 7/1

$582

Sun 8/179:20 amCPH - STL

2 stops18h 13mKLM

Sat 8/233:30 pmSTL - CPH

1 stop11h 35mKLM

Deal found 7/1

$585

Sun 8/1712:25 pmCPH - STL

1 stop14h 35mAir Canada

Sat 8/231:30 pmSTL - CPH

1 stop10h 40mAir Canada

Deal found 7/1

$855

One-way flights from Copenhagen to St. Louis
Search for one-way flight options from Copenhagen to St. Louis. Find affordable one-way fares based on user searches. Data last updated July 3, 2025.

Sun 9/147:55 amCPH - STL

3 stops38h 09mMultiple Airlines

Deal found 7/2

$469

Thu 10/169:35 amCPH - STL

2 stops16h 34mLufthansa

Deal found 7/2

$582

Wed 10/297:00 amCPH - STL

2 stops18h 25mAustrian Airlines

Deal found 7/3

$1,151

Tue 10/281:15 pmCPH - STL

1 stop14h 44mDelta

Deal found 7/3

$1,512

Cheapflights Fare Finder

Use the filters below to find and compare flights from Copenhagen to St. Louis that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

CopenhagenSt. Louis

CPH - STL

CPHSTL

Kastrup Copenhagen

Sat 8/16

8:00 pm-6:29 pm

2 stops29h 29m

Lambert-St Louis

Sat 8/23

4:19 pm-6:40 pm

2 stops19h 21m

$518

CopenhagenSt. Louis

CPH - STL

CPHSTL

Kastrup Copenhagen

Sun 8/17

8:50 am-7:29 pm

2 stops17h 39m

Lambert-St Louis

Sat 8/23

1:01 pm-11:15 am

2 stops15h 14m

$532

CopenhagenSt. Louis

CPH - STL

CPHSTL

Kastrup Copenhagen

Thu 12/4

2:25 pm-3:29 pm

2 stops32h 04m

Lambert-St Louis

Mon 12/8

3:15 pm-12:35 pm

2 stops14h 20m

$537

CopenhagenSt. Louis

CPH - STL

CPHSTL

Kastrup Copenhagen

Sun 8/17

12:20 pm-11:22 pm

1 stop18h 02m

Lambert-St Louis

Sat 8/23

3:30 pm-10:05 am

1 stop11h 35m

$540

CopenhagenSt. Louis

CPH - STL

CPHSTL

Kastrup Copenhagen

Thu 12/4

6:25 am-6:15 pm

2 stops18h 50m

Lambert-St Louis

Mon 12/8

4:39 pm-2:50 pm

2 stops15h 11m

$547

CopenhagenSt. Louis

CPH - STL

CPHSTL

Kastrup Copenhagen

Sun 8/17

9:00 am-5:54 pm

2 stops15h 54m

Lambert-St Louis

Sun 8/24

7:00 am-6:30 am

2 stops16h 30m

$550

CopenhagenSt. Louis

CPH - STL

CPHSTL

Kastrup Copenhagen

Sun 8/17

9:20 am-8:33 pm

2 stops18h 13m

Lambert-St Louis

Sat 8/23

5:25 pm-4:50 pm

2 stops16h 25m

$582

CopenhagenSt. Louis

CPH - STL

CPHSTL

Kastrup Copenhagen

Sun 8/17

9:20 am-8:33 pm

2 stops18h 13m

Lambert-St Louis

Sat 8/23

3:30 pm-10:05 am

1 stop11h 35m

$585

CopenhagenSt. Louis

CPH - STL

CPHSTL

Kastrup Copenhagen

Thu 12/4

1:15 pm-8:49 pm

1 stop14h 34m

Lambert-St Louis

Mon 12/8

1:30 pm-10:40 am

1 stop14h 10m

$822

CopenhagenSt. Louis

CPH - STL

CPHSTL

Kastrup Copenhagen

Sun 8/17

12:25 pm-8:00 pm

1 stop14h 35m

Lambert-St Louis

Sat 8/23

1:30 pm-7:10 am

1 stop10h 40m

$855

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/2

Showing 1-10 of 14 results

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?

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.

How much does it cost to fly round-trip from Copenhagen to St. Louis?

Reviews of airlines servicing St. Louis

See what other customers who have flown with Delta, KLM, and Austrian Airlines 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.

Delta

8.0

Very good

7,982 reviews

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Delta

8.0

Very good

7,982 reviews

Delta

8.0

Very good

7,982 reviews

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

KLM

7.8

Good

1,367 reviews

Delta

8.0

Very good

7,982 reviews

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Austrian Airlines

7.6

Good

809 reviews

Delta

8.0

Very good

7,982 reviews

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Finnair

7.6

Good

1,306 reviews

Delta

8.0

Very good

7,982 reviews

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

United Airlines

7.4

Good

8,861 reviews

Delta

8.0

Very good

7,982 reviews

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Related info for your journey

What are the cheapest airlines flying from Copenhagen to St. Louis round-trip?
Finnair, at $518, was found to be the cheapest airline from Copenhagen to St. Louis.Alternate airlines to your destination round-trip include British Airways and United Airlines. Users have found that Finnair is 4% 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 ($582), Austrian Airlines ($1,151), and Delta ($1,512).
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

O'Fallon

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Top 2 airlines flying from Copenhagen to St. Louis

Airline	Cheapest	Average	Flexibility	On-time
Air Canada	Cheapest$322	Average$582	FlexibilityNo cancel fee	On-time67%
United Airlines	Cheapest$482	Average$594	FlexibilityNo cancel fee	On-time69%

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$469+ 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 9/14. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Copenhagen to St. Louis with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Cheapflights Tip: The best prices from Kastrup Copenhagen to Lambert-St Louis are usually found in April or September, booked 49 days in advance, depart on a Saturday or Thursday and return on a Tuesday

Cheap flight deals from Copenhagen to St. Louis

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Find flight deals from Copenhagen to St. Louis

Cheapest flights from Copenhagen to St. LouisExplore 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 July 3, 2025.

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 July 3, 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from Copenhagen to St. Louis that are best for you.

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.

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 June 27, 2025.

What is the cheapest month to book a flight from Copenhagen to St. Louis?

How much does it cost to fly round-trip from Copenhagen to St. Louis?

Reviews of airlines servicing St. Louis

See what other customers who have flown with Delta, KLM, and Austrian Airlines 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.

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?

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

Can I find deals for flights from Copenhagen to St. Louis that include hotel bookings?

How can I find direct flights from Copenhagen to St. Louis?

Can I find deals for business class flights from Copenhagen to St. Louis?

What is the cheapest month to book a flight from Copenhagen to St. Louis?

Traveling to a place near Copenhagen?

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Alternative routes for Copenhagen to St. Louis

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Top 2 airlines flying from Copenhagen to St. Louis

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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 July 3, 2025.