$406 Find Cheap Flights from Denmark to St. Louis - Compare and Save

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight to St. Louis departing on 9/9. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to St. Louis

 
These are the airlines KAYAK users have selected most often from within our search results for flights to St. Louis, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results for flights to St. Louis, as well as popular online travel agencies
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Flight Deals

Cheap Flights from Denmark to St. Louis

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Denmark to St. Louis that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Denmark to St. Louis

Wed, Aug 26 - Sun, Aug 30
British Airways Logo
3:20 pm - 11:34 pm
CPH
-
STL
15h 14m
1 stop
British Airways Logo
6:25 pm - 10:40 pm
STL
-
CPH
21h 15m
2 stops
$604British Airways
Thu, Dec 3 - Sun, Dec 6
American Airlines Logo
10:30 am - 8:21 pm
CPH
-
STL
16h 51m
2 stops
American Airlines Logo
3:22 pm - 7:30 pm
STL
-
CPH
21h 08m
2 stops
$612American Airlines
Thu, Dec 3 - Sun, Dec 6
American Airlines Logo
10:30 am - 8:21 pm
CPH
-
STL
16h 51m
2 stops
American Airlines Logo
3:22 pm - 7:30 pm
STL
-
CPH
21h 08m
2 stops
$614American Airlines
Fri, Jul 10 - Tue, Jul 14
Air Canada Logo
12:15 pm - 6:42 pm
CPH
-
STL
13h 27m
1 stop
Air Canada Logo
12:10 pm - 8:55 am
STL
-
CPH
13h 45m
1 stop
$671Air Canada
Fri, Jul 10 - Tue, Jul 14
Air Canada Logo
12:15 pm - 6:42 pm
CPH
-
STL
13h 27m
1 stop
Air Canada Logo
8:55 am - 8:55 am
STL
-
CPH
17h 00m
2 stops
$675Air Canada
Wed, Jul 8 - Tue, Jul 14
United Airlines Logo
6:20 am - 11:29 pm
CPH
-
STL
24h 09m
2 stops
United Airlines Logo
6:01 am - 8:55 am
STL
-
CPH
19h 54m
2 stops
$677United Airlines
Fri, Jul 10 - Tue, Jul 14
United Airlines Logo
6:30 am - 6:13 pm
CPH
-
STL
18h 43m
2 stops
United Airlines Logo
6:01 am - 8:55 am
STL
-
CPH
19h 54m
2 stops
$678United Airlines
Tue, Jun 30 - Sat, Jul 4
Lufthansa Logo
7:15 pm - 9:29 pm
BLL
-
STL
33h 14m
2 stops
Lufthansa Logo
12:55 pm - 2:05 pm
STL
-
BLL
18h 10m
2 stops
$793Lufthansa
Tue, Jun 30 - Sat, Jul 4
Delta Logo
6:40 am - 6:07 pm
BLL
-
STL
18h 27m
2 stops
Delta Logo
6:10 pm - 9:35 am
STL
-
BLL
32h 25m
2 stops
$816Delta
Tue, Jun 30 - Sat, Jul 4
Lufthansa Logo
6:05 am - 1:25 pm
BLL
-
STL
14h 20m
1 stop
Lufthansa Logo
1:18 pm - 10:00 am
STL
-
BLL
13h 42m
2 stops
$929Lufthansa
Booking Insights

KAYAK's insights & trends for flights to St. Louis

Get data-powered insights and trends for flights to St. Louis to help you find the cheapest flights, the best time to fly and much more.

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights to St. Louis, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights to St. Louis is October, where tickets cost $271 on average for return flights. On the other hand, the most expensive months are July and January, where the average cost of tickets from Denmark is $526 and $525 respectively. For one-way flights, the best month to travel is February with an average price of $283.

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

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights to St. Louis, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price, you should book around 4 weeks before departure, which saves you about 32% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 23 weeks before departure.

Good to know

Low seasonApril
Cheapest flight$406
Best time to beat the crowds with an average 7% drop in price.
Most popular time to fly with an average 17% increase in price.
Flight from Copenhagen to St. Louis

FAQs - booking St. Louis flights

  • How far is Lambert-St Louis Airport from central St. Louis?

    The city center of St. Louis is 13 miles from Lambert-St Louis Airport.

  • What is the name of St. Louis’s airport?

    There is only 1 airport in St. Louis, called Lambert-St Louis Airport (STL). It can also be referred to as Lambert Field, Lambert-St Louis, St. Louis Lambert, or St. Louis Lambert Intl.

  • How does KAYAK find such low prices on flights to St. Louis?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights to St. Louis.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket to St. Louis?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to St. Louis is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights to St. Louis?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to St. Louis with an airline and back with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight to St. Louis?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to St. Louis up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

  • How many direct flights to St. Louis are there each week?

    Each week there are around 2,981 direct flights from within Denmark to St. Louis. The most common day for departures is Sunday, with 16% of flights taking off on this day.

Top tips for finding cheap flights to St. Louis

  • Enter your preferred departure airport and travel dates into the search form above to unlock the latest St. Louis flight deals.

Reviews of the top airlines flying from Denmark to St. Louis

 
See real verified KAYAK customer reviews for airlines flying to St. Louis. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline from Denmark to St. Louis. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with to St. Louis? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.4
United AirlinesOverall score based on 9831 reviews
6.6Food
7.3Comfort
7.7Boarding
8.1Crew
7.1Entertainment
Airline reviews

Our flight was delayed several Times due to mechanical issues. Although I understand this may happen at times, it was very inconvenient and we had to book a hotel for an overnight stay. We were traveling with my 3-yo grandson and waiting at the airport from noon until 6:30pm with no reassurance that our next rescheduled flight would depart, we had to decide what’s best for him. A day later, I found out that I may be able to demand compensation if my flight is delayed more than 4 hours. I will hav to read the fine print next time.

4.0 OkayOlivia, Jun 2026
SEA - SFO
Read more United Airlines reviews

Our flight was delayed several Times due to mechanical issues. Although I understand this may happen at times, it was very inconvenient and we had to book a hotel for an overnight stay. We were traveling with my 3-yo grandson and waiting at the airport from noon until 6:30pm with no reassurance that our next rescheduled flight would depart, we had to decide what’s best for him. A day later, I found out that I may be able to demand compensation if my flight is delayed more than 4 hours. I will hav to read the fine print next time.

The pilot had to extend the flight time from san antonio to Houston to burn off fuel. This caused a lot of unnecessary stress since we had a tight connection to Aruba. And with no other flights going to Aruba we were worried about spending a night in Houston. We had to to run to our connection because of the flight crews mistake. Not happy.

Service was professional and quick. Premium economy seat was comfortable given the class

I'm a United 1K member and have ben for 10 years. The gate agent had no control over the boarding process and had us passengers queued for hours as delays were announced. On the plane, the overhead air nozzle was broken so col over was powering through on me and the passenger next to me. Not a great experience for a million miler on United. Feel free to contact me. Josh Smigel - DM426089

Like: departed and arrived on time. Unlike: Food options for purchase allways bad, 1 of 2 of the crew members not very friendly at all. Seats and leg room aweful. At this point I am thinking on switching to AA.

Over 5 hour delay with minimal updates or ability to standby for alternative flights. During boarding and 1 hr+ wait for takeoff, seats were drenched w water from air conditioning condensation and always leftover crumbs on carpet and seats

I missed my flight and had to buy new tickets Rome- Boston

The staff was extremely helpful and friendly at all times! They went above and beyond to get us into an earlier flight in San Diego to make our connection in SFO possible, because our original flight did actually not make it! I did so much appreciate the UA team and how they made this possible. We also didn’t have seats together on the long flight to Singapore, but they found us seats together last moment with no additional cost! Nobody sat next to us, so that we were able to sleep! Thanks to UA for improving their service and Underpricer for booking this trip! Please be careful: 1,5 hrs for transfer in San Francisco might not be enough time in the future

Over 2.5 hour maintenance delay on first morning flight with no acknowledgement, compensation or even gesture of good will. Aircraft had overnighted at airport so issue should have been addressed prior to boarding. Over 3.5 hours before first slow and deliberate beverage service.

I flew from Barcelona to Chicago on UA yesterday. The flight was on time, the pilots did a great job and the flight attendants were super nice. All of them. Also food was good, and the drinks, including wine were served a few times during our flight. I highly recommend this airline.

The food on this flight was better than what we had getting to Rome. The flight was comfortable and the staff was great. One of the staff members was a stickler about the blankets in the aisle, which I get, but still. Overall, great flight and will fly with them again!

Our screen kept turning off ...3 times...had to get crew attention to turn it on again

The legroom was lacking and the entertainment system lacked adequate selection of older films. Modern films are generally not very good.

Perfect airline, super friendly, great service, tasty food. Would fly again.

The flight attendants were wonderful - one man put my carry on in the bin for me. Very attentive service. Loved the blanket and pillow waiting for me in economy. Food was excellent which is a surprise given the reputation of any airline food. Wine was fine with the meals. Delighted with the new movies - flight went by very quickly. I would definitely fly Lufthansa again.

Flight was delayed by several hours and then cancelled due to weather. But Staff was very helpful getting me on a different flight. United should offer food coupons and tooth brush and paste for stranded passengers

Service was excellent. Flight was only about half full, which meant we had tons of room to stretch out. Boarding area was nice and well organized, flight attendants were super friendly and attentive and we loved the 3 snacks!

My flight was cancelled, but it was not Kayak's fault. Kayak did require me to pay for the ticket twice to two different venders who paid Lufthansa. Kayak/Lufthansa owes me for the first booking I made first was fraudulent on the part of the subcontracting ticket seller. There will be litigation over this issue under the current passenger protection laws.

flight was half full, plenty of empty seats, was able to lie down across 4 seats, food was good, arrived on time

Was never allowed on and not refunded the full amount of the ticket plus charged a $300 processing fee.

Traveling to a place near St. Louis?

Book flights to St. Louis if you plan to visit one of these locations
O'Fallon
Wentzville
Farmington
Eureka
Litchfield
Grafton
Shrewsbury
Glencoe

Everything you need to know for your flight to St. Louis

Information on the airport you'll fly into in St. Louis