Which airport is the most popular layover for flights between St. Louis and Madrid?

Chicago (ORD) was the most common stop: 29% of momondo users choosing 1-stop flights on this route connected there.

What airlines fly to Madrid?

British Airways, American Airlines and Iberia are the top three most popular airlines that fly to Madrid from St. Louis according to our data. British Airways is the first choice among our users, with 38% of people opting to fly with this airline when traveling to Madrid. Keep in mind that there are 6 different airlines that fly to Madrid on a routine basis, so you have a few additional options to choose from.

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

United Airlines and British Airways are the most popular carriers operating from Lambert-St Louis to Madrid Barajas

Which layover airport has the shortest travel time from St. Louis to Madrid?

Flights connecting via Atlanta (ATL) have the shortest average one-way travel time: 10h 47m.

Which layover airport offers the lowest fares from St. Louis to Madrid?

Flights via Chicago (ORD) offer the lowest average round-trip price of $630.

Which layover airport has the shortest connection time from St. Louis to Madrid?

Atlanta (ATL) has the shortest average layover time for this route: 1h 34m.

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

Prices for flights from Lambert-St Louis Airport to Madrid Barajas Airport are updated daily.

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

The number of operators available for flights from Lambert-St Louis Airport to Madrid Barajas Airport is 6 as of September 2026.

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

Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Lambert-St Louis Airport to Madrid Barajas Airport.

What documentation or ID do you need to fly to Madrid Barajas Airport?

The travel and health documents you'll need for your trip to Madrid Barajas Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Madrid Barajas Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

$316 Cheap Flights from St. Louis to Madrid in 2026

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from St. Louis to Madrid

Round-trip

One-way

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Cheap round-trip flights

Enter your travel dates to find the best prices.

6:30 am - 7:20 amSTL Lambert-St Louis-MAD Madrid Barajas

17h 50m2 stops Minneapolis St Paul New York John F Kennedy Intl

9:20 am - 8:49 pmMAD Madrid Barajas-STL Lambert-St Louis

18h 29m2 stops New York John F Kennedy Intl Atlanta Hartsfield-Jackson

$642Virgin Atlantic

Sun, Jan 17 - Wed, Jan 27

9:51 am - 6:10 amSTL Lambert-St Louis-MAD Madrid Barajas

13h 19m1 stop Dallas/Fort Worth

1:00 pm - 8:19 pmMAD Madrid Barajas-STL Lambert-St Louis

14h 19m1 stop Dallas/Fort Worth

$647Iberia

Sun, Jan 17 - Wed, Jan 27

12:10 pm - 6:50 amSTL Lambert-St Louis-MAD Madrid Barajas

11h 40m1 stop Montreal Pierre Elliott Trudeau Intl

1:30 pm - 2:00 pmMAD Madrid Barajas-STL Lambert-St Louis

31h 30m1 stop Toronto Pearson Intl

$689Air Canada

Sun, Oct 4 - Tue, Oct 20

1:20 pm - 8:50 amSTL Lambert-St Louis-MAD Madrid Barajas

12h 30m1 stop Chicago O'Hare Intl

12:55 am - 9:31 amMAD Madrid Barajas-STL Lambert-St Louis

15h 36m1 stop Dallas/Fort Worth

$709Iberia

Tue, Nov 10 - Mon, Nov 23

11:29 am - 9:15 amSTL Lambert-St Louis-MAD Madrid Barajas

14h 46m1 stop Newark

1:25 pm - 2:35 pmMAD Madrid Barajas-STL Lambert-St Louis

32h 10m2 stops Montreal Pierre Elliott Trudeau Intl Chicago O'Hare Intl

$711United Airlines

Tue, Nov 10 - Tue, Nov 24

6:00 am - 8:05 amSTL Lambert-St Louis-MAD Madrid Barajas

19h 05m2 stops Chicago O'Hare Intl Washington, D.C. Dulles Intl

12:45 pm - 3:43 pmMAD Madrid Barajas-STL Lambert-St Louis

33h 58m2 stops Montreal Pierre Elliott Trudeau Intl Chicago O'Hare Intl

$715United Airlines

Wed, Oct 7 - Wed, Oct 21

6:40 am - 6:20 amSTL Lambert-St Louis-MAD Madrid Barajas

16h 40m2 stops Detroit Metropolitan Wayne County Boston Logan Intl

2:35 pm - 11:54 pmMAD Madrid Barajas-STL Lambert-St Louis

16h 19m2 stops Boston Logan Intl Atlanta Hartsfield-Jackson

$722Delta

Sun, Oct 4 - Tue, Oct 20

6:00 am - 12:15 pmSTL Lambert-St Louis-MAD Madrid Barajas

23h 15m1 stop Atlanta Hartsfield-Jackson

2:35 pm - 11:54 pmMAD Madrid Barajas-STL Lambert-St Louis

16h 19m2 stops Boston Logan Intl Atlanta Hartsfield-Jackson

$722Delta

Sun, Oct 4 - Tue, Oct 20

1:20 pm - 12:15 pmSTL Lambert-St Louis-MAD Madrid Barajas

15h 55m2 stops Chicago O'Hare Intl London Heathrow

12:40 pm - 6:31 pmMAD Madrid Barajas-STL Lambert-St Louis

12h 51m1 stop Charlotte Douglas

$728British Airways

Wed, Dec 9 - Tue, Dec 15

1:20 pm - 5:15 pmSTL Lambert-St Louis-MAD Madrid Barajas

20h 55m2 stops Chicago O'Hare Intl London Heathrow

12:40 pm - 7:30 pmMAD Madrid Barajas-STL Lambert-St Louis

13h 50m1 stop Charlotte Douglas

$733British Airways

Sun, Dec 13 - Fri, Dec 18

Cheap last minute flights

Enter your travel dates to find the best prices.

8:30 am - 6:50 amSTL Lambert-St Louis-MAD Madrid Barajas

15h 20m2 stops Chicago O'Hare Intl Montreal Pierre Elliott Trudeau Intl

5:00 pm - 1:25 pmMAD Madrid Barajas-STL Lambert-St Louis

27h 25m1 stop Frankfurt am Main

$1,041Multiple Airlines

Thu, Sep 10 - Mon, Sep 14

8:40 am - 11:20 amSTL Lambert-St Louis-MAD Madrid Barajas

19h 40m2 stops Washington, D.C. Dulles Intl Frankfurt am Main

6:25 pm - 1:25 pmMAD Madrid Barajas-STL Lambert-St Louis

26h 00m2 stops Munich Franz Josef Strauss Frankfurt am Main

$1,048Lufthansa

Thu, Sep 10 - Mon, Sep 14

7:00 am - 6:50 amSTL Lambert-St Louis-MAD Madrid Barajas

16h 50m3 stops Newark Boston Logan Intl Montreal Pierre Elliott Trudeau Intl

12:45 pm - 3:38 pmMAD Madrid Barajas-STL Lambert-St Louis

33h 53m2 stops Montreal Pierre Elliott Trudeau Intl Chicago O'Hare Intl

$1,061United Airlines

Thu, Sep 10 - Mon, Sep 14

11:01 am - 1:30 pmSTL Lambert-St Louis-MAD Madrid Barajas

19h 29m1 stop Chicago O'Hare Intl

5:30 pm - 8:20 amMAD Madrid Barajas-STL Lambert-St Louis

21h 50m1 stop Boston Logan Intl

$1,078Iberia

Thu, Sep 10 - Mon, Sep 14

8:55 am - 9:35 amSTL Lambert-St Louis-MAD Madrid Barajas

17h 40m1 stop Toronto Pearson Intl

2:30 pm - 2:00 pmMAD Madrid Barajas-STL Lambert-St Louis

30h 30m2 stops Cancun Toronto Pearson Intl

$1,257Multiple Airlines

Wed, Sep 9 - Fri, Sep 11

3:30 pm - 12:10 pmSTL Lambert-St Louis-MAD Madrid Barajas

13h 40m1 stop Frankfurt am Main

6:00 am - 1:25 pmMAD Madrid Barajas-STL Lambert-St Louis

14h 25m1 stop Frankfurt am Main

$1,264Lufthansa

Wed, Sep 9 - Fri, Sep 11

12:10 pm - 12:10 pmSTL Lambert-St Louis-MAD Madrid Barajas

17h 00m2 stops Montreal Pierre Elliott Trudeau Intl Frankfurt am Main

2:30 pm - 2:00 pmMAD Madrid Barajas-STL Lambert-St Louis

30h 30m2 stops Cancun Toronto Pearson Intl

$1,276Multiple Airlines

Wed, Sep 9 - Fri, Sep 11

12:10 pm - 11:50 amSTL Lambert-St Louis-MAD Madrid Barajas

16h 40m2 stops Montreal Pierre Elliott Trudeau Intl Brussels Bruxelles-National

9:25 pm - 6:41 pmMAD Madrid Barajas-STL Lambert-St Louis

28h 16m3 stops Skopje Vienna Intl Montreal Pierre Elliott Trudeau Intl

$1,685Multiple Airlines

Wed, Sep 9 - Fri, Sep 11

6:00 am - 12:00 pmSTL Lambert-St Louis-MAD Madrid Barajas

47h 00m3 stops Los Angeles Hong Kong Intl Barcelona-El Prat

2:55 pm - 11:43 pmMAD Madrid Barajas-STL Lambert-St Louis

39h 48m3 stops London Heathrow Hong Kong Intl Dallas/Fort Worth

$12,963Multiple Airlines

Thu, Sep 10 - Mon, Sep 14

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Air Canada flights from St. Louis to Madrid

Our best Air Canada deals on St. Louis to Madrid flight tickets

Air Canada

Oct 4

STL12:10 pmLambert-St Louis

11h 40m

1 stop

MAD6:50 amMadrid Barajas

Oct 20

MAD1:30 pmMadrid Barajas

31h 30m

1 stop

STL2:00 pmLambert-St Louis

$689

Air Canada

Nov 10

STL7:30 amLambert-St Louis

17h 30m

2 stops

MAD8:00 amMadrid Barajas

Nov 24

MAD1:25 pmMadrid Barajas

28h 07m

2 stops

STL10:32 amLambert-St Louis

$692

Air Canada

Oct 4

STL8:55 amLambert-St Louis

16h 55m

1 stop

MAD8:50 amMadrid Barajas

Oct 20

MAD1:30 pmMadrid Barajas

31h 30m

1 stop

STL2:00 pmLambert-St Louis

$694

Delta flights from St. Louis to Madrid

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

Delta

Oct 4

STL6:00 amLambert-St Louis

23h 15m

1 stop

MAD12:15 pmMadrid Barajas

Oct 20

MAD2:35 pmMadrid Barajas

16h 19m

2 stops

STL11:54 pmLambert-St Louis

$722

Delta

Dec 9

STL6:00 amLambert-St Louis

20h 45m

1 stop

MAD9:45 amMadrid Barajas

Dec 15

MAD10:50 amMadrid Barajas

16h 42m

2 stops

STL8:32 pmLambert-St Louis

$732

Delta

Oct 20

STL10:14 amLambert-St Louis

19h 01m

1 stop

MAD12:15 pmMadrid Barajas

Oct 27

MAD1:05 pmMadrid Barajas

16h 49m

2 stops

STL11:54 pmLambert-St Louis

$733

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

St. LouisMadrid

STL Lambert-St Louis - MAD Madrid Barajas

STLMAD

Lambert-St Louis

Sun 1/17

6:30 am-7:20 am

2 stops17h 50m

Madrid Barajas

Wed 1/27

9:20 am-8:49 pm

2 stops18h 29m

$642

Quickest round-trip

St. LouisMadrid

STL Lambert-St Louis - MAD Madrid Barajas

STLMAD

Lambert-St Louis

Sun 1/17

9:51 am-6:10 am

1 stop13h 19m

Madrid Barajas

Wed 1/27

1:00 pm-8:19 pm

1 stop14h 19m

$647

St. LouisMadrid

STL Lambert-St Louis - MAD Madrid Barajas

STLMAD

Lambert-St Louis

Sun 10/4

12:10 pm-6:50 am

1 stop11h 40m

Madrid Barajas

Tue 10/20

1:30 pm-2:00 pm

1 stop31h 30m

$689

St. LouisMadrid

STL Lambert-St Louis - MAD Madrid Barajas

STLMAD

Lambert-St Louis

Tue 11/10

1:20 pm-8:50 am

1 stop12h 30m

Madrid Barajas

Mon 11/23

12:55 am-9:31 am

1 stop15h 36m

$709

St. LouisMadrid

STL Lambert-St Louis - MAD Madrid Barajas

STLMAD

Lambert-St Louis

Tue 11/10

11:29 am-9:15 am

1 stop14h 46m

Madrid Barajas

Tue 11/24

1:25 pm-2:35 pm

2 stops32h 10m

$711

St. LouisMadrid

STL Lambert-St Louis - MAD Madrid Barajas

STLMAD

Lambert-St Louis

Wed 10/7

6:00 am-8:05 am

2 stops19h 05m

Madrid Barajas

Wed 10/21

12:45 pm-3:43 pm

2 stops33h 58m

$715

St. LouisMadrid

STL Lambert-St Louis - MAD Madrid Barajas

STLMAD

Lambert-St Louis

Sun 10/4

6:40 am-6:20 am

2 stops16h 40m

Madrid Barajas

Tue 10/20

2:35 pm-11:54 pm

2 stops16h 19m

$722

St. LouisMadrid

STL Lambert-St Louis - MAD Madrid Barajas

STLMAD

Lambert-St Louis

Sun 10/4

6:00 am-12:15 pm

1 stop23h 15m

Madrid Barajas

Tue 10/20

2:35 pm-11:54 pm

2 stops16h 19m

$722

St. LouisMadrid

STL Lambert-St Louis - MAD Madrid Barajas

STLMAD

Lambert-St Louis

Wed 12/9

1:20 pm-12:15 pm

2 stops15h 55m

Madrid Barajas

Tue 12/15

12:40 pm-6:31 pm

1 stop12h 51m

$728

St. LouisMadrid

STL Lambert-St Louis - MAD Madrid Barajas

STLMAD

Lambert-St Louis

Sun 12/13

1:20 pm-5:15 pm

2 stops20h 55m

Madrid Barajas

Fri 12/18

12:40 pm-7:30 pm

1 stop13h 50m

$733

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 St. Louis to Madrid

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

Layovers

What is the typical price of a round-trip flight between St. Louis and Madrid?

Prices are currently low for flights on this route.

Typical prices usually range from $830 to $1,188.
The lowest price recently found on this route was $642.

What is the cheapest month to fly to Madrid?

The month of February is, on average, the cheapest month to fly to Madrid from St. Louis, with most prices found around $673. If you don’t want to visit Madrid in February, then you should wait until April to fly from St. Louis, when ticket prices are also cheap, with an average price of $735.

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

You are more likely to see cheaper flights to Madrid from St. Louis when booking weeks ahead of your departure date. In general, you can expect to find flights to Madrid for around $944 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Madrid from St. Louis for as low as $659 on momondo.

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

You could potentially save up to 19% on your flight if you consider stops on a St. Louis to Madrid flight.

How have St. Louis to Madrid flight prices changed over time?

As of September 2026, prices for St. Louis to Madrid flights are approximately 37% cheaper when compared to flights at the same time last year.

When to book flights from St. Louis to Madrid

Are you open to changing your travel dates? Check out the ideal times to fly from St. Louis to Madrid according to our flight data. Find out which month and days have the cheapest flights.

Estimated round-trip price

Cheap St. Louis to Madrid (STL to MAD) flight deals and tips

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

Best Price Found	$316
Fastest flight time	11h 40m
Direct flights	None

The best one-way flight to Madrid from St. Louis in the past 72 hours is $316. The best round-trip flight deal from St. Louis to Madrid found on momondo in the last 72 hours is $642.

The fastest flight from St. Louis to Madrid takes 11h 40m

There are no direct flights from St. Louis to Madrid. There are no popular flight routes from St. Louis to Madrid.

Search flight deals

Frequently asked questions about flying from St. Louis to Madrid

How far is Lambert-St Louis to Madrid Barajas by plane?
The straight-line distance from Lambert-St Louis to Madrid Barajas is 4406.9 mi. 11h 40m is a normal flight duration for this route.
When did momondo last update prices for flights from Lambert-St Louis Airport to Madrid Barajas Airport?
Prices for flights from Lambert-St Louis Airport to Madrid Barajas Airport are updated daily.
How many operators does momondo search for flights from Lambert-St Louis Airport to Madrid Barajas Airport?
The number of operators available for flights from Lambert-St Louis Airport to Madrid Barajas Airport is 6 as of September 2026.
How old do you have to be to fly from Lambert-St Louis Airport to Madrid Barajas Airport?
Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Lambert-St Louis Airport to Madrid Barajas Airport.
What documentation or ID do you need to fly to Madrid Barajas Airport?
The travel and health documents you'll need for your trip to Madrid Barajas Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Madrid Barajas Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.
What is the most popular airline from St. Louis to Madrid?
momondo data reveals that the most frequently booked airline on the route from St. Louis to Madrid is British Airways, representing 34% of all bookings. The subsequent popular airlines are American Airlines at 29%, Iberia at 18%, and Lufthansa at 7%.

Best airlines flying from St. Louis to Madrid

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

Airline	Rating	Free Cancellation	Price
Lufthansa	PriceFrom $482	Free Cancellation	Rating 6.8 8,219 reviews	Search Lufthansa flights
Delta	PriceFrom $489	Free Cancellation	Rating 7.8 8,548 reviews	Search Delta flights
British Airways	PriceFrom $516	Free Cancellation	Rating 6.7 8,209 reviews	Search British Airways flights
Iberia	PriceFrom $523	Free Cancellation	Rating 7.0 3,247 reviews	Search Iberia flights
American Airlines	PriceFrom $581	Free Cancellation	Rating 7.1 12,041 reviews	Search American Airlines flights
United Airlines	PriceFrom $586	Free Cancellation	Rating 7.4 10,176 reviews	Search United Airlines flights

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Why use momondo?

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

It is quick and easy to find St. Louis to Madrid 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 Madrid that suits you.

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

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

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

Once you have performed a search for St. Louis to Madrid 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 St. Louis to Madrid right now. Can momondo alert me if prices change?

Price alerts on flights to Madrid from St. Louis are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

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Cheap flights from St. Louis to Madrid from $316

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from St. Louis to Madrid departing on 10/2. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

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Air Canada flights from St. Louis to Madrid

Our best Air Canada deals on St. Louis to Madrid flight tickets

Delta flights from St. Louis to Madrid

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

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See travel insights to Madrid from

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

What is the typical price of a round-trip flight between St. Louis and Madrid?

What is the cheapest month to fly to Madrid?

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

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

How have St. Louis to Madrid flight prices changed over time?

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

What airlines fly to Madrid?

Which airport is the most popular layover for flights between St. Louis and Madrid?

Which layover airport offers the lowest fares from St. Louis to Madrid?

Which layover airport has the shortest travel time from St. Louis to Madrid?

Which layover airport has the shortest connection time from St. Louis to Madrid?

When to book flights from St. Louis to Madrid

Cheap St. Louis to Madrid (STL to MAD) flight deals and tips

Best Price Found

Fastest flight time

Direct flights

Frequently asked questions about flying from St. Louis to Madrid

Best airlines flying from St. Louis to Madrid

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

Traveling to a place near Madrid?

Why use momondo?

An easier way to manage your Madrid trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to Spain

Fly your favorite airline to Madrid

Airlines are sorted and displayed according to clicks in the past 7 days on momondo

Cabin classes currently available on flights to Madrid

List of cabin classes available on flights landing in Madrid. Availability may vary depending on flight origin and airline.

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Popular flights according to clicks in the last 7 days on momondo

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