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?

Chicago (ORD) has the shortest average layover time for this route: 2h 01m.

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 39% 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 airport is the most popular layover for flights between St. Louis and Madrid?

Chicago (ORD) was the most common stop: 38% 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 Chicago (ORD) have the shortest average one-way travel time: 11h 23m.

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

Air Canada is the most popular carrier operating from Lambert-St Louis to Madrid Barajas

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 August 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.

$340 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

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

2:40 pm - 8:50 amSTL Lambert-St Louis-MAD Madrid Barajas

11h 10m1 stop Toronto Pearson Intl

1:30 pm - 8:20 pmMAD Madrid Barajas-STL Lambert-St Louis

13h 50m1 stop Toronto Pearson Intl

$683Multiple Airlines

Mon, Sep 28 - Wed, Oct 14

2:40 pm - 8:50 amSTL Lambert-St Louis-MAD Madrid Barajas

11h 10m1 stop Toronto Pearson Intl

5:55 am - 6:41 pmMAD Madrid Barajas-STL Lambert-St Louis

19h 46m2 stops Frankfurt am Main Montreal Pierre Elliott Trudeau Intl

$704Air Canada

Mon, Sep 28 - Wed, Oct 14

6:50 pm - 5:50 pmSTL Lambert-St Louis-MAD Madrid Barajas

16h 00m2 stops Chicago O'Hare Intl Munich Franz Josef Strauss

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

14h 40m1 stop Frankfurt am Main

$707Lufthansa

Wed, Nov 4 - Wed, Nov 11

10:21 am - 7:45 amSTL Lambert-St Louis-MAD Madrid Barajas

14h 24m1 stop Dallas/Fort Worth

12:55 am - 9:30 amMAD Madrid Barajas-STL Lambert-St Louis

15h 35m1 stop Dallas/Fort Worth

$709Iberia

Wed, Nov 4 - Mon, Nov 9

11:32 am - 9:35 amSTL Lambert-St Louis-MAD Madrid Barajas

15h 03m1 stop Chicago O'Hare Intl

11:05 am - 9:59 pmMAD Madrid Barajas-STL Lambert-St Louis

17h 54m1 stop Dallas/Fort Worth

$709Iberia

Wed, Nov 4 - Wed, Nov 11

9:59 am - 9:15 amSTL Lambert-St Louis-MAD Madrid Barajas

16h 16m1 stop Newark

1:25 pm - 12:10 pmMAD Madrid Barajas-STL Lambert-St Louis

29h 45m2 stops Montreal Pierre Elliott Trudeau Intl Chicago O'Hare Intl

$711United Airlines

Sun, Nov 8 - Wed, Nov 18

1:00 pm - 7:45 amSTL Lambert-St Louis-MAD Madrid Barajas

11h 45m1 stop Washington, D.C. Dulles Intl

1:25 pm - 9:52 pmMAD Madrid Barajas-STL Lambert-St Louis

39h 27m2 stops Montreal Pierre Elliott Trudeau Intl Newark

$711United Airlines

Mon, Nov 9 - Wed, Nov 18

10:12 am - 9:25 amSTL Lambert-St Louis-MAD Madrid Barajas

16h 13m1 stop Dallas/Fort Worth

1:00 pm - 9:08 pmMAD Madrid Barajas-STL Lambert-St Louis

15h 08m1 stop Chicago O'Hare Intl

$719British Airways

Tue, Feb 23 - Fri, Mar 12

7:01 pm - 5:40 pmSTL Lambert-St Louis-MAD Madrid Barajas

15h 39m2 stops Chicago O'Hare Intl Munich Franz Josef Strauss

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

14h 25m1 stop Frankfurt am Main

$720Lufthansa

Mon, Sep 28 - Fri, Oct 9

10:21 am - 9:20 amSTL Lambert-St Louis-MAD Madrid Barajas

15h 59m1 stop Dallas/Fort Worth

12:40 pm - 6:34 pmMAD Madrid Barajas-STL Lambert-St Louis

12h 54m1 stop Charlotte Douglas

$731British Airways

Wed, Dec 9 - Tue, Jan 12

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United Airlines flights from St. Louis to Madrid

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

United Airlines

Oct 14

STL9:30 amLambert-St Louis

16h 30m

1 stop

MAD9:00 amMadrid Barajas

Oct 21

MAD12:45 pmMadrid Barajas

39h 24m

2 stops

STL9:09 pmLambert-St Louis

$711

United Airlines

Oct 4

STL6:00 amLambert-St Louis

17h 50m

2 stops

MAD6:50 amMadrid Barajas

Oct 14

MAD12:45 pmMadrid Barajas

33h 58m

2 stops

STL3:43 pmLambert-St Louis

$714

United Airlines

Sep 28

STL6:00 amLambert-St Louis

19h 05m

2 stops

MAD8:05 amMadrid Barajas

Oct 14

MAD5:55 amMadrid Barajas

14h 30m

1 stop

STL1:25 pmLambert-St Louis

$716

Lufthansa flights from St. Louis to Madrid

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

Lufthansa

Nov 4

STL6:50 pmLambert-St Louis

16h 00m

2 stops

MAD5:50 pmMadrid Barajas

Nov 11

MAD6:05 amMadrid Barajas

22h 30m

2 stops

STL9:35 pmLambert-St Louis

$730

Lufthansa

Oct 11

STL3:30 pmLambert-St Louis

14h 05m

1 stop

MAD12:35 pmMadrid Barajas

Oct 19

MAD1:25 pmMadrid Barajas

31h 00m

1 stop

STL1:25 pmLambert-St Louis

$761

Lufthansa

Sep 1

STL3:30 pmLambert-St Louis

13h 45m

1 stop

MAD12:15 pmMadrid Barajas

Sep 20

MAD1:15 pmMadrid Barajas

31h 10m

1 stop

STL1:25 pmLambert-St Louis

$1,003

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Quickest round-trip

St. LouisMadrid

STL Lambert-St Louis - MAD Madrid Barajas

STLMAD

Lambert-St Louis

Mon 9/28

2:40 pm-8:50 am

1 stop11h 10m

Madrid Barajas

Wed 10/14

1:30 pm-8:20 pm

1 stop13h 50m

$683

St. LouisMadrid

STL Lambert-St Louis - MAD Madrid Barajas

STLMAD

Lambert-St Louis

Mon 9/28

2:40 pm-8:50 am

1 stop11h 10m

Madrid Barajas

Wed 10/14

5:55 am-6:41 pm

2 stops19h 46m

$704

St. LouisMadrid

STL Lambert-St Louis - MAD Madrid Barajas

STLMAD

Lambert-St Louis

Wed 11/4

6:50 pm-5:50 pm

2 stops16h 00m

Madrid Barajas

Wed 11/11

6:05 am-1:45 pm

1 stop14h 40m

$707

St. LouisMadrid

STL Lambert-St Louis - MAD Madrid Barajas

STLMAD

Lambert-St Louis

Wed 11/4

10:21 am-7:45 am

1 stop14h 24m

Madrid Barajas

Mon 11/9

12:55 am-9:30 am

1 stop15h 35m

$709

St. LouisMadrid

STL Lambert-St Louis - MAD Madrid Barajas

STLMAD

Lambert-St Louis

Wed 11/4

11:32 am-9:35 am

1 stop15h 03m

Madrid Barajas

Wed 11/11

11:05 am-9:59 pm

1 stop17h 54m

$709

St. LouisMadrid

STL Lambert-St Louis - MAD Madrid Barajas

STLMAD

Lambert-St Louis

Sun 11/8

9:59 am-9:15 am

1 stop16h 16m

Madrid Barajas

Wed 11/18

1:25 pm-12:10 pm

2 stops29h 45m

$711

St. LouisMadrid

STL Lambert-St Louis - MAD Madrid Barajas

STLMAD

Lambert-St Louis

Mon 11/9

1:00 pm-7:45 am

1 stop11h 45m

Madrid Barajas

Wed 11/18

1:25 pm-9:52 pm

2 stops39h 27m

$711

St. LouisMadrid

STL Lambert-St Louis - MAD Madrid Barajas

STLMAD

Lambert-St Louis

Tue 2/23

10:12 am-9:25 am

1 stop16h 13m

Madrid Barajas

Fri 3/12

1:00 pm-9:08 pm

1 stop15h 08m

$719

St. LouisMadrid

STL Lambert-St Louis - MAD Madrid Barajas

STLMAD

Lambert-St Louis

Mon 9/28

7:01 pm-5:40 pm

2 stops15h 39m

Madrid Barajas

Fri 10/9

6:00 am-1:25 pm

1 stop14h 25m

$720

St. LouisMadrid

STL Lambert-St Louis - MAD Madrid Barajas

STLMAD

Lambert-St Louis

Wed 12/9

10:21 am-9:20 am

1 stop15h 59m

Madrid Barajas

Tue 1/12

12:40 pm-6:34 pm

1 stop12h 54m

$731

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 $683.

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 $950 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 4% 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 August 2026, prices for St. Louis to Madrid flights are approximately 17% 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	$340
Fastest flight time	11h 10m
Direct flights	None

The best one-way flight to Madrid from St. Louis in the past 72 hours is $340. The best round-trip flight deal from St. Louis to Madrid found on momondo in the last 72 hours is $683.

The fastest flight from St. Louis to Madrid takes 11h 10m

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 10m 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 August 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 United Airlines 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 8,228 reviews	Search Lufthansa flights
Delta	PriceFrom $489	Free Cancellation	Rating 7.8 8,539 reviews	Search Delta flights
British Airways	PriceFrom $516	Free Cancellation	Rating 6.7 8,192 reviews	Search British Airways flights
Iberia	PriceFrom $523	Free Cancellation	Rating 7.0 3,252 reviews	Search Iberia flights
American Airlines	PriceFrom $581	Free Cancellation	Rating 7.1 12,026 reviews	Search American Airlines flights
United Airlines	PriceFrom $586	Free Cancellation	Rating 7.4 10,135 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 $340

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 10/17. 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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United Airlines flights from St. Louis to Madrid

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

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Our best Lufthansa 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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