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.

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

United Airlines, American Airlines, and Aer Lingus are the most popular carriers operating from Lambert-St Louis to Madrid Barajas

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

Charlotte (CLT) was the most common stop: 48% of momondo users choosing 1-stop flights on this route connected there.

What airlines fly to Madrid?

American Airlines, British Airways and Iberia are the top three most popular airlines that fly to Madrid from St. Louis according to our data. American Airlines is the first choice among our users, with 34% 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.

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.

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.

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 November 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.

$336 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

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

2:23 pm - 6:10 amSTL Lambert-St Louis-MAD Madrid Barajas

32h 47m1 stop Dallas/Fort Worth

12:55 am - 9:27 amMAD Madrid Barajas-STL Lambert-St Louis

15h 32m1 stop Dallas/Fort Worth

$641Iberia

Sat, Mar 6 - Fri, Mar 12

6:15 am - 8:00 amSTL Lambert-St Louis-MAD Madrid Barajas

18h 45m2 stops Chicago O'Hare Intl Montreal Pierre Elliott Trudeau Intl

6:05 am - 1:45 pmMAD Madrid Barajas-STL Lambert-St Louis

14h 40m1 stop Frankfurt am Main

$720Multiple Airlines

Wed, Feb 24 - Wed, Mar 3

10:30 am - 12:15 pmSTL Lambert-St Louis-MAD Madrid Barajas

19h 45m2 stops Boston Logan Intl London Heathrow

5:30 pm - 9:54 amMAD Madrid Barajas-STL Lambert-St Louis

23h 24m1 stop Boston Logan Intl

$726Iberia

Wed, Mar 24 - Wed, Mar 31

5:00 am - 8:00 amSTL Lambert-St Louis-MAD Madrid Barajas

20h 00m2 stops Chicago O'Hare Intl Montreal Pierre Elliott Trudeau Intl

6:05 am - 3:26 pmMAD Madrid Barajas-STL Lambert-St Louis

16h 21m2 stops Frankfurt am Main Toronto Pearson Intl

$727Multiple Airlines

Wed, Feb 24 - Wed, Mar 3

8:30 am - 7:45 amSTL Lambert-St Louis-MAD Madrid Barajas

16h 15m1 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

$730United Airlines

Mon, Mar 1 - Thu, Mar 4

6:00 am - 9:30 amSTL Lambert-St Louis-MAD Madrid Barajas

20h 30m1 stop Newark

1:25 pm - 7:30 pmMAD Madrid Barajas-STL Lambert-St Louis

37h 05m2 stops Montreal Pierre Elliott Trudeau Intl Newark

$730United Airlines

Wed, Mar 3 - Wed, Mar 10

3:40 pm - 12:35 pmSTL Lambert-St Louis-MAD Madrid Barajas

13h 55m1 stop Frankfurt am Main

6:05 am - 1:45 pmMAD Madrid Barajas-STL Lambert-St Louis

14h 40m1 stop Frankfurt am Main

$732Lufthansa

Wed, Mar 3 - Wed, Mar 10

10:30 am - 11:00 amSTL Lambert-St Louis-MAD Madrid Barajas

18h 30m2 stops Boston Logan Intl London Heathrow

9:00 pm - 10:23 pmMAD Madrid Barajas-STL Lambert-St Louis

31h 23m2 stops London Heathrow Chicago O'Hare Intl

$762British Airways

Mon, Mar 15 - Mon, Mar 22

2:08 pm - 1:40 pmSTL Lambert-St Louis-MAD Madrid Barajas

16h 32m2 stops Chicago O'Hare Intl London Heathrow

12:00 pm - 10:34 pmMAD Madrid Barajas-STL Lambert-St Louis

17h 34m1 stop Chicago O'Hare Intl

$772British Airways

Wed, Jan 20 - Wed, Jan 27

1:17 pm - 11:35 pmSTL Lambert-St Louis-MAD Madrid Barajas

27h 18m2 stops Chicago O'Hare Intl Munich Franz Josef Strauss

6:35 pm - 9:37 pmMAD Madrid Barajas-STL Lambert-St Louis

34h 02m2 stops Munich Franz Josef Strauss Chicago O'Hare Intl

$780Lufthansa

Tue, Jan 5 - Mon, Jan 25

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American Airlines flights from St. Louis to Madrid

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

American Airlines

Feb 21

STL12:08 pmLambert-St Louis

14h 17m

1 stop

MAD9:25 amMadrid Barajas

Feb 26

MAD12:55 amMadrid Barajas

17h 23m

1 stop

STL11:18 amLambert-St Louis

$800

American Airlines

Nov 16

STL11:35 amLambert-St Louis

14h 15m

1 stop

MAD8:50 amMadrid Barajas

Nov 19

MAD1:00 pmMadrid Barajas

14h 17m

1 stop

STL8:17 pmLambert-St Louis

$1,165

Air Canada flights from St. Louis to Madrid

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

Air Canada

Mar 1

STL5:00 amLambert-St Louis

20h 00m

2 stops

MAD8:00 amMadrid Barajas

Mar 4

MAD1:25 pmMadrid Barajas

31h 52m

2 stops

STL2:17 pmLambert-St Louis

$733

Air Canada

Feb 21

STL7:10 pmLambert-St Louis

29h 50m

2 stops

MAD8:00 amMadrid Barajas

Feb 27

MAD1:25 pmMadrid Barajas

38h 58m

2 stops

STL9:23 pmLambert-St Louis

$783

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

St. LouisMadrid

STL Lambert-St Louis - MAD Madrid Barajas

STLMAD

Lambert-St Louis

Sat 3/6

2:23 pm-6:10 am

1 stop32h 47m

Madrid Barajas

Fri 3/12

12:55 am-9:27 am

1 stop15h 32m

$641

St. LouisMadrid

STL Lambert-St Louis - MAD Madrid Barajas

STLMAD

Lambert-St Louis

Wed 2/24

6:15 am-8:00 am

2 stops18h 45m

Madrid Barajas

Wed 3/3

6:05 am-1:45 pm

1 stop14h 40m

$720

St. LouisMadrid

STL Lambert-St Louis - MAD Madrid Barajas

STLMAD

Lambert-St Louis

Wed 3/24

10:30 am-12:15 pm

2 stops19h 45m

Madrid Barajas

Wed 3/31

5:30 pm-9:54 am

1 stop23h 24m

$726

St. LouisMadrid

STL Lambert-St Louis - MAD Madrid Barajas

STLMAD

Lambert-St Louis

Wed 2/24

5:00 am-8:00 am

2 stops20h 00m

Madrid Barajas

Wed 3/3

6:05 am-3:26 pm

2 stops16h 21m

$727

St. LouisMadrid

STL Lambert-St Louis - MAD Madrid Barajas

STLMAD

Lambert-St Louis

Mon 3/1

8:30 am-7:45 am

1 stop16h 15m

Madrid Barajas

Thu 3/4

1:25 pm-2:17 pm

2 stops31h 52m

$730

St. LouisMadrid

STL Lambert-St Louis - MAD Madrid Barajas

STLMAD

Lambert-St Louis

Wed 3/3

6:00 am-9:30 am

1 stop20h 30m

Madrid Barajas

Wed 3/10

1:25 pm-7:30 pm

2 stops37h 05m

$730

Quickest round-trip

St. LouisMadrid

STL Lambert-St Louis - MAD Madrid Barajas

STLMAD

Lambert-St Louis

Wed 3/3

3:40 pm-12:35 pm

1 stop13h 55m

Madrid Barajas

Wed 3/10

6:05 am-1:45 pm

1 stop14h 40m

$732

St. LouisMadrid

STL Lambert-St Louis - MAD Madrid Barajas

STLMAD

Lambert-St Louis

Mon 3/15

10:30 am-11:00 am

2 stops18h 30m

Madrid Barajas

Mon 3/22

9:00 pm-10:23 pm

2 stops31h 23m

$762

St. LouisMadrid

STL Lambert-St Louis - MAD Madrid Barajas

STLMAD

Lambert-St Louis

Wed 1/20

2:08 pm-1:40 pm

2 stops16h 32m

Madrid Barajas

Wed 1/27

12:00 pm-10:34 pm

1 stop17h 34m

$772

St. LouisMadrid

STL Lambert-St Louis - MAD Madrid Barajas

STLMAD

Lambert-St Louis

Tue 1/5

1:17 pm-11:35 pm

2 stops27h 18m

Madrid Barajas

Mon 1/25

6:35 pm-9:37 pm

2 stops34h 02m

$780

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 $736 to $1,293.
The lowest price recently found on this route was $641.

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 $688. 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 $725.

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 $971 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 $852 on momondo.

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

You could potentially save up to 41% 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 November 2026, prices for St. Louis to Madrid flights are approximately 60% 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	$336
Fastest flight time	12h 35m
Direct flights	None

The best one-way flight to Madrid from St. Louis in the past 72 hours is $336. The best round-trip flight deal from St. Louis to Madrid found on momondo in the last 72 hours is $641.

The fastest flight from St. Louis to Madrid takes 12h 35m

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. 12h 35m 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 November 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 American Airlines, representing 30% of all bookings. The subsequent popular airlines are British Airways at 30%, Iberia at 22%, and Lufthansa at 6%.

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 8,697 reviews	Search Delta flights
Lufthansa	PriceFrom $494	Free Cancellation	Rating 6.8 8,299 reviews	Search Lufthansa flights
British Airways	PriceFrom $516	Free Cancellation	Rating 6.7 8,280 reviews	Search British Airways flights
Iberia	PriceFrom $523	Free Cancellation	Rating 7.0 3,240 reviews	Search Iberia flights
American Airlines	PriceFrom $581	Free Cancellation	Rating 7.0 12,223 reviews	Search American Airlines flights
United Airlines	PriceFrom $866	Free Cancellation	Rating 7.3 10,463 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 $336

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 3/15. 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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American Airlines flights from St. Louis to Madrid

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

Air Canada flights from St. Louis to Madrid

Our best Air Canada 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

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Fly your favorite airline to Madrid

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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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