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 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.

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

Charlotte (CLT) was the most common stop: 42% of momondo users choosing 1-stop flights on this route connected there.

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.

$498 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

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One-way

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Cheap round-trip flights

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

15h 12m1 stop Dallas/Fort Worth

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

23h 24m1 stop Boston Logan Intl

$728Iberia

Wed, Mar 24 - Wed, Mar 31

2:21 pm - 8:50 amSTL Lambert-St Louis-MAD Madrid Barajas

11h 29m1 stop Chicago O'Hare Intl

1:15 pm - 8:31 pmMAD Madrid Barajas-STL Lambert-St Louis

14h 16m1 stop Philadelphia

$728Iberia

Mon, Mar 1 - Thu, Mar 4

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

$728Multiple Airlines

Mon, Mar 1 - Thu, Mar 4

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

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

16h 15m1 stop Washington, D.C. Dulles Intl

1:25 pm - 4:56 pmMAD Madrid Barajas-STL Lambert-St Louis

34h 31m2 stops Montreal Pierre Elliott Trudeau Intl Newark

$730United Airlines

Mon, Mar 1 - Thu, Mar 4

7:04 pm - 8:00 amSTL Lambert-St Louis-MAD Madrid Barajas

53h 56m2 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

$732Multiple Airlines

Sat, Mar 6 - Fri, Mar 12

4:40 pm - 12:35 pmSTL Lambert-St Louis-MAD Madrid Barajas

13h 55m1 stop Frankfurt am Main

8:25 am - 11:25 pmMAD Madrid Barajas-STL Lambert-St Louis

22h 00m2 stops Frankfurt am Main Newark

$742Lufthansa

Wed, Mar 24 - Wed, Mar 31

9:00 am - 9:45 amSTL Lambert-St Louis-MAD Madrid Barajas

18h 45m1 stop Atlanta Hartsfield-Jackson

12:20 pm - 11:39 pmMAD Madrid Barajas-STL Lambert-St Louis

17h 19m1 stop Atlanta Hartsfield-Jackson

$750Delta

Mon, Mar 15 - Thu, Mar 18

11:51 am - 9:45 amSTL Lambert-St Louis-MAD Madrid Barajas

14h 54m1 stop Atlanta Hartsfield-Jackson

9:20 am - 8:51 pmMAD Madrid Barajas-STL Lambert-St Louis

17h 31m1 stop New York John F Kennedy Intl

$750Delta

Wed, Mar 10 - Wed, Mar 17

4:40 pm - 8:15 pmSTL Lambert-St Louis-MAD Madrid Barajas

21h 35m1 stop 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

$764Lufthansa

Wed, Mar 24 - Mon, Mar 29

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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 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

Mar 13

STL4:05 pmLambert-St Louis

55h 55m

2 stops

MAD7:00 amMadrid Barajas

Mar 17

MAD12:50 pmMadrid Barajas

40h 29m

2 stops

STL11:19 pmLambert-St Louis

$752

Air Canada

Jan 20

STL5:00 amLambert-St Louis

20h 00m

2 stops

MAD8:00 amMadrid Barajas

Jan 27

MAD1:25 pmMadrid Barajas

35h 25m

2 stops

STL5:50 pmLambert-St Louis

$757

United Airlines flights from St. Louis to Madrid

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

United Airlines

Mar 1

STL8:30 amLambert-St Louis

16h 15m

1 stop

MAD7:45 amMadrid Barajas

Mar 4

MAD1:25 pmMadrid Barajas

31h 52m

2 stops

STL2:17 pmLambert-St Louis

$730

United Airlines

Mar 1

STL9:52 amLambert-St Louis

16h 38m

1 stop

MAD9:30 amMadrid Barajas

Mar 4

MAD11:15 amMadrid Barajas

15h 15m

1 stop

STL7:30 pmLambert-St Louis

$750

United Airlines

Mar 15

STL6:00 amLambert-St Louis

19h 00m

2 stops

MAD7:00 amMadrid Barajas

Mar 17

MAD11:15 amMadrid Barajas

14h 15m

1 stop

STL7:30 pmLambert-St Louis

$753

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

St. LouisMadrid

STL Lambert-St Louis - MAD Madrid Barajas

STLMAD

Lambert-St Louis

Wed 3/24

12:08 pm-9:20 am

1 stop15h 12m

Madrid Barajas

Wed 3/31

5:30 pm-9:54 am

1 stop23h 24m

$728

Quickest round-trip

St. LouisMadrid

STL Lambert-St Louis - MAD Madrid Barajas

STLMAD

Lambert-St Louis

Mon 3/1

2:21 pm-8:50 am

1 stop11h 29m

Madrid Barajas

Thu 3/4

1:15 pm-8:31 pm

1 stop14h 16m

$728

St. LouisMadrid

STL Lambert-St Louis - MAD Madrid Barajas

STLMAD

Lambert-St Louis

Mon 3/1

5:00 am-8:00 am

2 stops20h 00m

Madrid Barajas

Thu 3/4

6:05 am-3:26 pm

2 stops16h 21m

$728

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

Mon 3/1

8:30 am-7:45 am

1 stop16h 15m

Madrid Barajas

Thu 3/4

1:25 pm-4:56 pm

2 stops34h 31m

$730

St. LouisMadrid

STL Lambert-St Louis - MAD Madrid Barajas

STLMAD

Lambert-St Louis

Sat 3/6

7:04 pm-8:00 am

2 stops53h 56m

Madrid Barajas

Fri 3/12

6:05 am-1:45 pm

1 stop14h 40m

$732

St. LouisMadrid

STL Lambert-St Louis - MAD Madrid Barajas

STLMAD

Lambert-St Louis

Wed 3/24

4:40 pm-12:35 pm

1 stop13h 55m

Madrid Barajas

Wed 3/31

8:25 am-11:25 pm

2 stops22h 00m

$742

St. LouisMadrid

STL Lambert-St Louis - MAD Madrid Barajas

STLMAD

Lambert-St Louis

Mon 3/15

9:00 am-9:45 am

1 stop18h 45m

Madrid Barajas

Thu 3/18

12:20 pm-11:39 pm

1 stop17h 19m

$750

St. LouisMadrid

STL Lambert-St Louis - MAD Madrid Barajas

STLMAD

Lambert-St Louis

Wed 3/10

11:51 am-9:45 am

1 stop14h 54m

Madrid Barajas

Wed 3/17

9:20 am-8:51 pm

1 stop17h 31m

$750

St. LouisMadrid

STL Lambert-St Louis - MAD Madrid Barajas

STLMAD

Lambert-St Louis

Wed 3/24

4:40 pm-8:15 pm

1 stop21h 35m

Madrid Barajas

Mon 3/29

6:25 pm-1:25 pm

2 stops26h 00m

$764

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 $737 to $1,293.
The lowest price recently found on this route was $728.

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 $977 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 $901 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	$498
Fastest flight time	11h 29m
Direct flights	None

The best one-way flight to Madrid from St. Louis in the past 72 hours is $498. The best round-trip flight deal from St. Louis to Madrid found on momondo in the last 72 hours is $728.

The fastest flight from St. Louis to Madrid takes 11h 29m

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 29m 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 8,698 reviews	Search Delta flights
Lufthansa	PriceFrom $494	Free Cancellation	Rating 6.8 8,297 reviews	Search Lufthansa flights
British Airways	PriceFrom $516	Free Cancellation	Rating 6.7 8,285 reviews	Search British Airways flights
Iberia	PriceFrom $523	Free Cancellation	Rating 7.0 3,234 reviews	Search Iberia flights
American Airlines	PriceFrom $581	Free Cancellation	Rating 7.0 12,230 reviews	Search American Airlines flights
United Airlines	PriceFrom $866	Free Cancellation	Rating 7.3 10,470 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 $498

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 1/19. 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

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Our best United 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

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Get notified when prices go down

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Find better results for your trip to Spain

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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