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

Charlotte (CLT) was the most common stop: 43% of momondo users choosing 1-stop flights on this route connected there.

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.

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

Aer Lingus is the most popular carrier 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.

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 37% 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.

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 October 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.

$331 Cheap Flights from St. Louis to Madrid in 2026/27

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.

7:04 pm - 5:50 pmSTL Lambert-St Louis-MAD Madrid Barajas

16h 46m2 stops Chicago O'Hare Intl Munich Franz Josef Strauss

5:55 am - 1:25 pmMAD Madrid Barajas-STL Lambert-St Louis

14h 30m1 stop Frankfurt am Main

$714Lufthansa

Mon, Mar 22 - Wed, Mar 31

4:05 pm - 7:00 amSTL Lambert-St Louis-MAD Madrid Barajas

32h 55m2 stops Toronto Pearson Intl Montreal Pierre Elliott Trudeau Intl

6:05 am - 2:45 pmMAD Madrid Barajas-STL Lambert-St Louis

14h 40m1 stop Frankfurt am Main

$714Multiple Airlines

Sun, Mar 21 - Fri, Mar 26

2:19 pm - 8:50 amSTL Lambert-St Louis-MAD Madrid Barajas

12h 31m1 stop Chicago O'Hare Intl

1:35 pm - 8:22 pmMAD Madrid Barajas-STL Lambert-St Louis

13h 47m1 stop Chicago O'Hare Intl

$718Iberia

Mon, Mar 22 - Wed, Mar 31

12:08 pm - 9:20 amSTL Lambert-St Louis-MAD Madrid Barajas

15h 12m1 stop Dallas/Fort Worth

1:00 pm - 7:27 pmMAD Madrid Barajas-STL Lambert-St Louis

12h 27m1 stop Chicago O'Hare Intl

$718Iberia

Wed, Mar 17 - Fri, Mar 26

8:25 am - 7:45 amSTL Lambert-St Louis-MAD Madrid Barajas

16h 20m1 stop Washington, D.C. Dulles Intl

1:25 pm - 2:17 pmMAD Madrid Barajas-STL Lambert-St Louis

31h 52m2 stops Montreal Pierre Elliott Trudeau Intl Chicago O'Hare Intl

$720United Airlines

Mon, Mar 1 - Thu, Mar 4

6:30 am - 9:30 amSTL Lambert-St Louis-MAD Madrid Barajas

20h 00m1 stop Newark

1:25 pm - 5:09 pmMAD Madrid Barajas-STL Lambert-St Louis

34h 44m2 stops Montreal Pierre Elliott Trudeau Intl Chicago O'Hare Intl

$720United Airlines

Mon, Mar 1 - Thu, Mar 4

4:05 pm - 7:00 amSTL Lambert-St Louis-MAD Madrid Barajas

32h 55m2 stops Toronto Pearson Intl Montreal Pierre Elliott Trudeau Intl

10:05 am - 3:26 pmMAD Madrid Barajas-STL Lambert-St Louis

35h 21m2 stops Zurich Toronto Pearson Intl

$721Multiple Airlines

Sun, Mar 21 - Fri, Mar 26

11:45 am - 4:20 pmSTL Lambert-St Louis-MAD Madrid Barajas

22h 35m2 stops Newark Frankfurt am Main

6:05 am - 2:45 pmMAD Madrid Barajas-STL Lambert-St Louis

14h 40m1 stop Frankfurt am Main

$726Lufthansa

Wed, Mar 17 - Fri, Mar 26

5:49 pm - 6:35 pmSTL Lambert-St Louis-MAD Madrid Barajas

17h 46m2 stops Chicago O'Hare Intl London Heathrow

12:40 pm - 9:57 pmMAD Madrid Barajas-STL Lambert-St Louis

16h 17m1 stop Charlotte Douglas

$738British Airways

Wed, Jan 20 - Wed, Jan 27

1:51 pm - 2:15 pmSTL Lambert-St Louis-MAD Madrid Barajas

17h 24m2 stops Chicago O'Hare Intl London Heathrow

12:40 pm - 9:57 pmMAD Madrid Barajas-STL Lambert-St Louis

16h 17m1 stop Charlotte Douglas

$762British Airways

Tue, Jan 5 - Tue, Jan 19

Cheap last minute flights

Enter your travel dates to find the best prices.

2:25 pm - 12:15 pmSTL Lambert-St Louis-MAD Madrid Barajas

14h 50m1 stop Atlanta Hartsfield-Jackson

6:05 am - 11:54 pmMAD Madrid Barajas-STL Lambert-St Louis

23h 49m2 stops Amsterdam Schiphol Atlanta Hartsfield-Jackson

$810Delta

Wed, Oct 21 - Fri, Oct 30

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

17h 15m1 stop Atlanta Hartsfield-Jackson

10:50 am - 11:54 pmMAD Madrid Barajas-STL Lambert-St Louis

19h 04m2 stops Amsterdam Schiphol Atlanta Hartsfield-Jackson

$810Delta

Wed, Oct 21 - Fri, Oct 30

10:14 am - 12:15 pmSTL Lambert-St Louis-MAD Madrid Barajas

19h 01m1 stop Atlanta Hartsfield-Jackson

1:05 pm - 11:54 pmMAD Madrid Barajas-STL Lambert-St Louis

16h 49m2 stops Amsterdam Schiphol Atlanta Hartsfield-Jackson

$810KLM

Wed, Oct 21 - Fri, Oct 30

10:14 am - 12:15 pmSTL Lambert-St Louis-MAD Madrid Barajas

19h 01m1 stop Atlanta Hartsfield-Jackson

1:05 pm - 11:54 pmMAD Madrid Barajas-STL Lambert-St Louis

16h 49m2 stops Amsterdam Schiphol Atlanta Hartsfield-Jackson

$810KLM

Wed, Oct 21 - Fri, Oct 30

12:47 pm - 9:05 amSTL Lambert-St Louis-MAD Madrid Barajas

13h 18m1 stop Dallas/Fort Worth

12:00 pm - 12:19 amMAD Madrid Barajas-STL Lambert-St Louis

18h 19m1 stop Chicago O'Hare Intl

$940Iberia

Wed, Oct 21 - Fri, Oct 30

12:47 pm - 9:05 amSTL Lambert-St Louis-MAD Madrid Barajas

13h 18m1 stop Dallas/Fort Worth

12:00 pm - 12:19 amMAD Madrid Barajas-STL Lambert-St Louis

18h 19m1 stop Chicago O'Hare Intl

$940Iberia

Wed, Oct 21 - Fri, Oct 30

12:46 pm - 9:05 amSTL Lambert-St Louis-MAD Madrid Barajas

13h 19m1 stop Dallas/Fort Worth

9:00 pm - 6:17 pmMAD Madrid Barajas-STL Lambert-St Louis

28h 17m2 stops London Heathrow Chicago O'Hare Intl

$1,018British Airways

Mon, Oct 19 - Mon, Nov 2

11:21 am - 9:35 amSTL Lambert-St Louis-MAD Madrid Barajas

15h 14m1 stop Philadelphia

12:00 pm - 6:17 pmMAD Madrid Barajas-STL Lambert-St Louis

13h 17m1 stop Chicago O'Hare Intl

$1,044American Airlines

Mon, Oct 19 - Mon, Nov 2

9:30 am - 8:05 amSTL Lambert-St Louis-MAD Madrid Barajas

15h 35m2 stops Newark Washington, D.C. Dulles Intl

1:20 pm - 11:24 pmMAD Madrid Barajas-STL Lambert-St Louis

17h 04m2 stops Frankfurt am Main Chicago O'Hare Intl

$1,049United Airlines

Mon, Oct 19 - Mon, Nov 2

11:21 am - 9:35 amSTL Lambert-St Louis-MAD Madrid Barajas

15h 14m1 stop Philadelphia

12:00 pm - 6:17 pmMAD Madrid Barajas-STL Lambert-St Louis

13h 17m1 stop Chicago O'Hare Intl

$1,050American Airlines

Mon, Oct 19 - Mon, Nov 2

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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

Mar 6

STL4:05 pmLambert-St Louis

56h 55m

2 stops

MAD8:00 amMadrid Barajas

Mar 10

MAD1:25 pmMadrid Barajas

38h 48m

2 stops

STL9:13 pmLambert-St Louis

$726

Air Canada

Mar 3

STL6:00 amLambert-St Louis

19h 00m

2 stops

MAD8:00 amMadrid Barajas

Mar 8

MAD1:20 pmMadrid Barajas

57h 06m

2 stops

STL3:26 pmLambert-St Louis

$774

Air Canada

Mar 4

STL4:05 pmLambert-St Louis

32h 55m

2 stops

MAD8:00 amMadrid Barajas

Mar 9

MAD1:25 pmMadrid Barajas

32h 37m

2 stops

STL3:02 pmLambert-St Louis

$776

American Airlines flights from St. Louis to Madrid

Our best American Airlines deals on St. Louis to Madrid flight tickets

American Airlines

Jan 20

STL5:00 amLambert-St Louis

17h 50m

1 stop

MAD5:50 amMadrid Barajas

Jan 27

MAD12:00 pmMadrid Barajas

15h 33m

1 stop

STL8:33 pmLambert-St Louis

$740

American Airlines

Mar 12

STL10:30 amLambert-St Louis

15h 20m

1 stop

MAD8:50 amMadrid Barajas

Mar 17

MAD12:00 pmMadrid Barajas

13h 27m

1 stop

STL7:27 pmLambert-St Louis

$805

American Airlines

Oct 19

STL11:21 amLambert-St Louis

15h 14m

1 stop

MAD9:35 amMadrid Barajas

Nov 2

MAD12:00 pmMadrid Barajas

13h 17m

1 stop

STL6:17 pmLambert-St Louis

$1,044

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

St. LouisMadrid

STL Lambert-St Louis - MAD Madrid Barajas

STLMAD

Lambert-St Louis

Mon 3/22

7:04 pm-5:50 pm

2 stops16h 46m

Madrid Barajas

Wed 3/31

5:55 am-1:25 pm

1 stop14h 30m

$714

St. LouisMadrid

STL Lambert-St Louis - MAD Madrid Barajas

STLMAD

Lambert-St Louis

Sun 3/21

4:05 pm-7:00 am

2 stops32h 55m

Madrid Barajas

Fri 3/26

6:05 am-2:45 pm

1 stop14h 40m

$714

Quickest round-trip

St. LouisMadrid

STL Lambert-St Louis - MAD Madrid Barajas

STLMAD

Lambert-St Louis

Mon 3/22

2:19 pm-8:50 am

1 stop12h 31m

Madrid Barajas

Wed 3/31

1:35 pm-8:22 pm

1 stop13h 47m

$718

St. LouisMadrid

STL Lambert-St Louis - MAD Madrid Barajas

STLMAD

Lambert-St Louis

Wed 3/17

12:08 pm-9:20 am

1 stop15h 12m

Madrid Barajas

Fri 3/26

1:00 pm-7:27 pm

1 stop12h 27m

$718

St. LouisMadrid

STL Lambert-St Louis - MAD Madrid Barajas

STLMAD

Lambert-St Louis

Mon 3/1

8:25 am-7:45 am

1 stop16h 20m

Madrid Barajas

Thu 3/4

1:25 pm-2:17 pm

2 stops31h 52m

$720

St. LouisMadrid

STL Lambert-St Louis - MAD Madrid Barajas

STLMAD

Lambert-St Louis

Mon 3/1

6:30 am-9:30 am

1 stop20h 00m

Madrid Barajas

Thu 3/4

1:25 pm-5:09 pm

2 stops34h 44m

$720

St. LouisMadrid

STL Lambert-St Louis - MAD Madrid Barajas

STLMAD

Lambert-St Louis

Sun 3/21

4:05 pm-7:00 am

2 stops32h 55m

Madrid Barajas

Fri 3/26

10:05 am-3:26 pm

2 stops35h 21m

$721

St. LouisMadrid

STL Lambert-St Louis - MAD Madrid Barajas

STLMAD

Lambert-St Louis

Wed 3/17

11:45 am-4:20 pm

2 stops22h 35m

Madrid Barajas

Fri 3/26

6:05 am-2:45 pm

1 stop14h 40m

$726

St. LouisMadrid

STL Lambert-St Louis - MAD Madrid Barajas

STLMAD

Lambert-St Louis

Wed 1/20

5:49 pm-6:35 pm

2 stops17h 46m

Madrid Barajas

Wed 1/27

12:40 pm-9:57 pm

1 stop16h 17m

$738

St. LouisMadrid

STL Lambert-St Louis - MAD Madrid Barajas

STLMAD

Lambert-St Louis

Tue 1/5

1:51 pm-2:15 pm

2 stops17h 24m

Madrid Barajas

Tue 1/19

12:40 pm-9:57 pm

1 stop16h 17m

$762

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 $715 to $815.
The lowest price recently found on this route was $714.

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 $948 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 $794 on momondo.

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

You could potentially save up to 57% 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 October 2026, prices for St. Louis to Madrid flights are approximately 52% 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	$331
Fastest flight time	11h 45m
Direct flights	None

The best one-way flight to Madrid from St. Louis in the past 72 hours is $331. The best round-trip flight deal from St. Louis to Madrid found on momondo in the last 72 hours is $714.

The fastest flight from St. Louis to Madrid takes 11h 45m

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 45m 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 October 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 33% of all bookings. The subsequent popular airlines are American Airlines at 28%, Iberia at 21%, 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
Delta	PriceFrom $489	Free Cancellation	Rating 7.8 8,662 reviews	Search Delta flights
Lufthansa	PriceFrom $494	Free Cancellation	Rating 6.8 8,282 reviews	Search Lufthansa flights
British Airways	PriceFrom $516	Free Cancellation	Rating 6.7 8,264 reviews	Search British Airways flights
Iberia	PriceFrom $523	Free Cancellation	Rating 7.0 3,245 reviews	Search Iberia flights
American Airlines	PriceFrom $581	Free Cancellation	Rating 7.0 12,177 reviews	Search American Airlines flights
United Airlines	PriceFrom $623	Free Cancellation	Rating 7.4 10,381 reviews	Search United Airlines flights

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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 $331

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 3/8. 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

American Airlines flights from St. Louis to Madrid

Our best American Airlines deals on St. Louis to Madrid flight tickets

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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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According to popular flight searches on momondo this year

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