What is the cheapest airline that flies from Europe to Lambert-St Louis?

Finnair, American Airlines, and Aer Lingus are the most popular carriers operating from Europe to Lambert-St Louis

What airlines fly to St. Louis?

United Airlines, Lufthansa and Iberia are the top three most popular airlines that fly to St. Louis from Europe according to our data. United Airlines is the first choice among our users, with 63% of people opting to fly with this airline when traveling to St. Louis. Keep in mind that there are 6 different airlines that fly to St. Louis on a routine basis, so you have a few additional options to choose from.

How long does it take to fly to St. Louis?

Flight times from Europe to St. Louis vary, but if you’re flying out of Madrid and flying into St. Louis (one of the most popular routes), then the duration is 12h 46m on average. Another popular route from Europe to St. Louis is flying from Copenhagen to St. Louis, which will take roughly 14h 48m. Keep in mind that layovers or delays could extend your travel time.

When did momondo last update prices for flights from Europe to Lambert-St Louis Airport?

Prices for flights from Europe to Lambert-St Louis Airport are refreshed on a daily basis.

How many operators does momondo search for flights from Europe to Lambert-St Louis Airport?

As of September 2025, there are 6 operators available to choose from for flights from Europe to Lambert-St Louis Airport.

How old do you have to be to fly from Europe to Lambert-St Louis Airport?

The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Europe to Lambert-St Louis Airport.

What documentation or ID do you need to fly to Lambert-St Louis Airport?

The required travel and health documents for your Lambert-St Louis Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Lambert-St Louis Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

$309 Cheap Flights from Europe to St. Louis in 2025/26

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Find the cheapest flights from Europe to St. Louis

Round-trip

One-way

Last minute

Direct

Cheap round-trip flights

8:40 am - 8:51 pmCPH-STL

18h 11m2 stops

1:20 pm - 4:15 pmSTL-CPH

19h 55m2 stops

$466Finnair

Find Deal

Fri, Oct 31 - Wed, Nov 5

6:55 am - 8:51 pmCPH-STL

19h 56m2 stops

11:42 am - 12:15 pmSTL-CPH

17h 33m2 stops

$476Multiple Airlines

Find Deal

Fri, Oct 31 - Wed, Nov 5

6:55 am - 6:25 pmCPH-STL

18h 30m2 stops

6:45 pm - 4:55 pmSTL-CPH

15h 10m2 stops

$488British Airways

Find Deal

Wed, Nov 12 - Tue, Nov 25

10:30 am - 8:23 pmCPH-STL

16h 53m2 stops

2:08 pm - 1:15 pmSTL-CPH

16h 07m2 stops

$489British Airways

Find Deal

Wed, Nov 12 - Tue, Nov 25

6:50 am - 1:55 pmCPH-STL

14h 05m1 stop

12:31 pm - 12:25 pmSTL-CPH

16h 54m2 stops

$521Lufthansa

Find Deal

Wed, Nov 12 - Tue, Nov 25

6:50 am - 2:55 pmCPH-STL

14h 05m1 stop

3:50 pm - 1:35 pmSTL-CPH

14h 45m1 stop

$527Lufthansa

Find Deal

Fri, Oct 31 - Wed, Nov 5

2:45 pm - 11:24 pmCPH-STL

15h 39m2 stops

12:14 pm - 9:55 amSTL-CPH

14h 41m1 stop

$530KLM

Find Deal

Thu, Oct 2 - Thu, Oct 9

9:50 am - 6:02 pmFRA-STL

14h 12m1 stop

11:44 am - 9:35 amSTL-FRA

14h 51m2 stops

$593KLM

Find Deal

Fri, Oct 31 - Fri, Nov 14

10:45 am - 2:55 pmFRA-STL

10h 10mnonstop

3:14 pm - 9:55 amSTL-FRA

11h 41m1 stop

$641United Airlines

Find Deal

Fri, Oct 31 - Fri, Nov 14

10:45 am - 2:55 pmFRA-STL

10h 10mnonstop

3:50 pm - 7:30 amSTL-FRA

8h 40mnonstop

$644United Airlines

Find Deal

Fri, Oct 31 - Fri, Nov 14

KLM flights from Europe to St. Louis

Our best KLM deals on Europe to St. Louis flight tickets

KLM

Oct 2

CPH2:45 pmKastrup Copenhagen

15h 39m

2 stops

STL11:24 pmLambert-St Louis

Oct 9

STL12:14 pmLambert-St Louis

14h 41m

1 stop

CPH9:55 amKastrup Copenhagen

$530

Find similar

KLM

Oct 31

FRA9:50 amFrankfurt am Main

14h 12m

1 stop

STL6:02 pmLambert-St Louis

Nov 14

STL11:44 amLambert-St Louis

14h 51m

2 stops

FRA9:35 amFrankfurt am Main

$593

Find similar

KLM

Oct 31

FRA2:15 pmFrankfurt am Main

25h 00m

2 stops

STL9:15 amLambert-St Louis

Nov 14

STL4:30 pmLambert-St Louis

14h 10m

2 stops

FRA1:40 pmFrankfurt am Main

$594

Find similar

Delta flights from Europe to St. Louis

Our best Delta deals on Europe to St. Louis flight tickets

Delta

Sep 29

CPH6:10 amKastrup Copenhagen

21h 24m

2 stops

STL8:34 pmLambert-St Louis

Oct 4

STL6:40 amLambert-St Louis

20h 15m

2 stops

CPH9:55 amKastrup Copenhagen

$556

Find similar

Delta

Oct 13

FRA7:00 amFrankfurt am Main

17h 29m

2 stops

STL5:29 pmLambert-St Louis

Oct 20

STL11:21 amLambert-St Louis

14h 39m

2 stops

FRA9:00 amFrankfurt am Main

$588

Find similar

Delta

Oct 1

FRA7:00 amFrankfurt am Main

16h 37m

2 stops

STL4:37 pmLambert-St Louis

Oct 11

STL6:00 amLambert-St Louis

19h 55m

1 stop

FRA8:55 amFrankfurt am Main

$592

Find similar

Fly from

Fly to

Route

Depart

Return

Price

CopenhagenSt. Louis

CPH - STL

CPHSTL

Kastrup Copenhagen

Fri 10/31

8:40 am-8:51 pm

2 stops18h 11m

Lambert-St Louis

Wed 11/5

1:20 pm-4:15 pm

2 stops19h 55m

$466

CopenhagenSt. Louis

CPH - STL

CPHSTL

Kastrup Copenhagen

Fri 10/31

6:55 am-8:51 pm

2 stops19h 56m

Lambert-St Louis

Wed 11/5

11:42 am-12:15 pm

2 stops17h 33m

$476

CopenhagenSt. Louis

CPH - STL

CPHSTL

Kastrup Copenhagen

Wed 11/12

6:55 am-6:25 pm

2 stops18h 30m

Lambert-St Louis

Tue 11/25

6:45 pm-4:55 pm

2 stops15h 10m

$488

CopenhagenSt. Louis

CPH - STL

CPHSTL

Kastrup Copenhagen

Wed 11/12

10:30 am-8:23 pm

2 stops16h 53m

Lambert-St Louis

Tue 11/25

2:08 pm-1:15 pm

2 stops16h 07m

$489

CopenhagenSt. Louis

CPH - STL

CPHSTL

Kastrup Copenhagen

Wed 11/12

6:50 am-1:55 pm

1 stop14h 05m

Lambert-St Louis

Tue 11/25

12:31 pm-12:25 pm

2 stops16h 54m

$521

CopenhagenSt. Louis

CPH - STL

CPHSTL

Kastrup Copenhagen

Fri 10/31

6:50 am-2:55 pm

1 stop14h 05m

Lambert-St Louis

Wed 11/5

3:50 pm-1:35 pm

1 stop14h 45m

$527

CopenhagenSt. Louis

CPH - STL

CPHSTL

Kastrup Copenhagen

Thu 10/2

2:45 pm-11:24 pm

2 stops15h 39m

Lambert-St Louis

Thu 10/9

12:14 pm-9:55 am

1 stop14h 41m

$530

Frankfurt am MainSt. Louis

FRA - STL

FRASTL

Frankfurt am Main

Fri 10/31

9:50 am-6:02 pm

1 stop14h 12m

Lambert-St Louis

Fri 11/14

11:44 am-9:35 am

2 stops14h 51m

$593

Frankfurt am MainSt. Louis

FRA - STL

FRASTL

Frankfurt am Main

Fri 10/31

10:45 am-2:55 pm

Nonstop10h 10m

Lambert-St Louis

Fri 11/14

3:14 pm-9:55 am

1 stop11h 41m

$641

Frankfurt am MainSt. Louis

FRA - STL

FRASTL

Frankfurt am Main

Fri 10/31

10:45 am-2:55 pm

Nonstop10h 10m

Lambert-St Louis

Fri 11/14

3:50 pm-7:30 am

Nonstop8h 40m

$644

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from Europe to St. Louis

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

Other information

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

In general, March is the cheapest month to fly from Europe to St. Louis. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $740. The month of January is another great option to travel to St. Louis, with average flight prices from Europe averaging around $753.

What is the cheapest day to depart on your flight to St. Louis?

The cheapest day to depart on your flight to St. Louis is on a Wednesday when prices can be found for as low as $952. This is often the case because there is less demand to fly during this day of the week. If your travel schedule is flexible, try to avoid departing on a Saturday because tickets tend to average around $1,371. These prices are subject to change though, so be sure to set up a Price Alert for flights to St. Louis.

What is the cheapest time of day to depart on your flight to St. Louis?

Flying to St. Louis from Europe at noon is the least expensive time of day to depart. momondo users have found prices as low as $1,075 when looking at flights departing at noon. In the morning is when there is more demand to fly to St. Louis, so prices are often more expensive at around $1,229 per ticket.

What is the cheapest Europe to Lambert-St Louis flight route?

Fly from Frankfurt am Main to Lambert-St Louis for the best Europe - Lambert-St Louis flight prices

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

You are more likely to see cheaper flights to St. Louis from Europe when booking weeks ahead of your departure date. In general, you can expect to find flights to St. Louis for around $972 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to St. Louis from Europe for as low as $880 on momondo.

What cabin class options are available on Europe to Lambert-St Louis flights?

There are 3 cabin classes available to choose from on Europe to Lambert-St Louis flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on Europe to St. Louis flights?

You could potentially save up to 58% on your flight if you consider stops on a Europe to St. Louis flight.

Cheap Europe to St. Louis flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Europe to St. Louis

Fastest flight time	9h 50m
Direct flights	Mon, Thu and Sat
Airports in St. Louis	1 airport

The fastest flight from Europe to St. Louis takes 9h 50m

Direct flights go from Europe to St. Louis on Monday, Thursday and Saturday. The only airline offering direct flights is Lufthansa.

There is 1 airport near St. Louis: Lambert-St Louis (STL)

Search flight deals

When did momondo last update prices for flights from Europe to Lambert-St Louis Airport?
Prices for flights from Europe to Lambert-St Louis Airport are refreshed on a daily basis.
How many operators does momondo search for flights from Europe to Lambert-St Louis Airport?
As of September 2025, there are 6 operators available to choose from for flights from Europe to Lambert-St Louis Airport.
How old do you have to be to fly from Europe to Lambert-St Louis Airport?
The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Europe to Lambert-St Louis Airport.
What documentation or ID do you need to fly to Lambert-St Louis Airport?
The required travel and health documents for your Lambert-St Louis Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Lambert-St Louis Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

Best airlines flying from Europe to St. Louis

Compare and see reviews for airlines that fly from Europe to St. Louis with momondo

Airline	Rating	Free Cancellation	Price
United Airlines	PriceFrom $485	Free Cancellation	Rating 7.4 8,929 reviews	Search United Airlines flights
Iberia	PriceFrom $553	Free Cancellation	Rating 7.0 2,924 reviews	Search Iberia flights
British Airways	PriceFrom $555	Free Cancellation	Rating 6.6 7,361 reviews	Search British Airways flights
American Airlines	PriceFrom $557	Free Cancellation	Rating 7.2 10,000 reviews	Search American Airlines flights
Air Canada	PriceFrom $567	Free Cancellation	Rating 7.1 10,000 reviews	Search Air Canada flights
Lufthansa	PriceFrom $589	Free Cancellation	Rating 6.8 7,407 reviews	Search Lufthansa flights

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Florissant

Maryland Heights

O'Fallon

Fenton

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Wentzville

Alton

St. Peters

Farmington

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Clayton

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Eureka

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Why use momondo?

Why should I use momondo to find a flight deal from Europe to St. Louis?

It is quick and easy to find Europe to St. Louis flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to St. Louis that suits you.

Can I find flights from Europe to St. Louis with flexible booking policies on momondo?

Yes. momondo allows you to filter the results for Europe to St. Louis flights to just show those with flexible booking policies.

How can momondo help me find flights from Europe to St. Louis?

Once you have performed a search for Europe to St. Louis flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

I’m not ready to book a flight from Europe to St. Louis right now. Can momondo alert me if prices change?

Of course. momondo tracks the price of Europe to St. Louis flights. All you need is a valid email address and we will do the rest; it is that quick and easy.