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.

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 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?

Iberia, United Airlines, and Air France are the most popular carriers operating from Lambert-St Louis to Madrid Barajas

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.

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.

$331 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

$679Multiple Airlines

Mon, Sep 28 - Wed, Oct 14

8:55 am - 8:50 amSTL Lambert-St Louis-MAD Madrid Barajas

16h 55m1 stop Toronto Pearson Intl

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

31h 30m1 stop Toronto Pearson Intl

$695Air Canada

Sun, Oct 4 - Tue, Oct 20

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

11h 40m1 stop Montreal Pierre Elliott Trudeau 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

$709United Airlines

Sun, Oct 4 - Wed, Oct 14

6:00 am - 9:15 amSTL Lambert-St Louis-MAD Madrid Barajas

20h 15m1 stop Newark

1:25 pm - 10:42 amMAD Madrid Barajas-STL Lambert-St Louis

28h 17m2 stops Montreal Pierre Elliott Trudeau Intl Chicago O'Hare Intl

$711United Airlines

Sun, Nov 29 - Wed, Dec 16

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

$723Delta

Sun, Oct 4 - Tue, Oct 20

1:49 pm - 1:30 pmSTL Lambert-St Louis-MAD Madrid Barajas

16h 41m1 stop Chicago O'Hare Intl

12:40 pm - 11:59 pmMAD Madrid Barajas-STL Lambert-St Louis

18h 19m1 stop Charlotte Douglas

$731British Airways

Mon, Sep 28 - Fri, Oct 9

5:00 pm - 2:25 pmSTL Lambert-St Louis-MAD Madrid Barajas

14h 25m1 stop Dallas/Fort Worth

12:40 pm - 11:59 pmMAD Madrid Barajas-STL Lambert-St Louis

18h 19m1 stop Charlotte Douglas

$731American Airlines

Tue, Sep 29 - Fri, Oct 9

6:30 am - 5:35 amSTL Lambert-St Louis-MAD Madrid Barajas

16h 05m1 stop Philadelphia

12:40 pm - 11:59 pmMAD Madrid Barajas-STL Lambert-St Louis

18h 19m1 stop Charlotte Douglas

$731American Airlines

Mon, Sep 28 - Fri, Oct 9

10:04 am - 9:45 amSTL Lambert-St Louis-MAD Madrid Barajas

16h 41m1 stop Atlanta Hartsfield-Jackson

9:20 am - 8:26 pmMAD Madrid Barajas-STL Lambert-St Louis

18h 06m1 stop New York John F Kennedy Intl

$731Delta

Wed, Dec 9 - Wed, Dec 16

1:49 pm - 12:40 pmSTL Lambert-St Louis-MAD Madrid Barajas

15h 51m2 stops Chicago O'Hare Intl London Heathrow

12:40 pm - 11:59 pmMAD Madrid Barajas-STL Lambert-St Louis

18h 19m1 stop Charlotte Douglas

$735British Airways

Mon, Sep 28 - Fri, Oct 9

Cheap last minute flights

Enter your travel dates to find the best prices.

6:54 pm - 5:40 pmSTL Lambert-St Louis-MAD Madrid Barajas

39h 46m2 stops Chicago O'Hare Intl Munich Franz Josef Strauss

12:45 pm - 7:11 pmMAD Madrid Barajas-STL Lambert-St Louis

37h 26m2 stops Montreal Pierre Elliott Trudeau Intl Washington, D.C. Reagan-National

$1,011United Airlines

Sat, Sep 5 - Sun, Sep 13

9:44 am - 6:50 amSTL Lambert-St Louis-MAD Madrid Barajas

14h 06m1 stop Boston Logan Intl

7:20 am - 9:57 pmMAD Madrid Barajas-STL Lambert-St Louis

21h 37m2 stops Dublin Dallas/Fort Worth

$1,022Iberia

Mon, Sep 7 - Sun, Oct 4

9:44 am - 6:50 amSTL Lambert-St Louis-MAD Madrid Barajas

14h 06m1 stop Boston Logan Intl

3:55 pm - 11:43 pmMAD Madrid Barajas-STL Lambert-St Louis

14h 48m1 stop Dallas/Fort Worth

$1,025Multiple Airlines

Mon, Sep 7 - Sun, Oct 4

6:54 pm - 5:40 pmSTL Lambert-St Louis-MAD Madrid Barajas

39h 46m2 stops Chicago O'Hare Intl Munich Franz Josef Strauss

12:45 pm - 6:41 pmMAD Madrid Barajas-STL Lambert-St Louis

12h 56m1 stop Montreal Pierre Elliott Trudeau Intl

$1,030United Airlines

Sat, Sep 5 - Sun, Sep 13

6:53 pm - 5:40 pmSTL Lambert-St Louis-MAD Madrid Barajas

15h 47m2 stops Chicago O'Hare Intl Munich Franz Josef Strauss

8:15 am - 9:21 pmMAD Madrid Barajas-STL Lambert-St Louis

44h 06m2 stops Frankfurt am Main Chicago O'Hare Intl

$1,046Lufthansa

Mon, Sep 7 - Sun, Oct 4

12:44 pm - 8:05 amSTL Lambert-St Louis-MAD Madrid Barajas

12h 21m1 stop Washington, D.C. Dulles Intl

12:45 pm - 6:41 pmMAD Madrid Barajas-STL Lambert-St Louis

12h 56m1 stop Montreal Pierre Elliott Trudeau Intl

$1,071Multiple Airlines

Sat, Sep 5 - Sun, Sep 13

6:53 pm - 6:50 amSTL Lambert-St Louis-MAD Madrid Barajas

28h 57m2 stops Chicago O'Hare Intl Montreal Pierre Elliott Trudeau Intl

11:15 am - 12:13 pmMAD Madrid Barajas-STL Lambert-St Louis

31h 58m3 stops Washington, D.C. Dulles Intl Houston George Bush Intcntl Chicago O'Hare Intl

$1,265United Airlines

Mon, Sep 7 - Sun, Oct 4

8:55 am - 8:50 amSTL Lambert-St Louis-MAD Madrid Barajas

16h 55m1 stop Toronto Pearson Intl

12:45 pm - 6:41 pmMAD Madrid Barajas-STL Lambert-St Louis

12h 56m1 stop Montreal Pierre Elliott Trudeau Intl

$1,265Multiple Airlines

Mon, Sep 7 - Wed, Sep 9

8:55 am - 8:50 amSTL Lambert-St Louis-MAD Madrid Barajas

16h 55m1 stop Toronto Pearson Intl

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

13h 50m1 stop Toronto Pearson Intl

$1,267Multiple Airlines

Mon, Sep 7 - Thu, Sep 10

8:55 am - 8:50 amSTL Lambert-St Louis-MAD Madrid Barajas

16h 55m1 stop Toronto Pearson Intl

12:45 pm - 4:06 pmMAD Madrid Barajas-STL Lambert-St Louis

34h 21m2 stops Montreal Pierre Elliott Trudeau Intl Newark

$1,275United Airlines

Mon, Sep 7 - Wed, Sep 9

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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 4

STL12:10 pmLambert-St Louis

11h 40m

1 stop

MAD6:50 amMadrid Barajas

Oct 14

MAD12:45 pmMadrid Barajas

33h 58m

2 stops

STL3:43 pmLambert-St Louis

$709

United Airlines

Oct 7

STL1:09 pmLambert-St Louis

11h 56m

1 stop

MAD8:05 amMadrid Barajas

Oct 21

MAD12:45 pmMadrid Barajas

32h 32m

2 stops

STL2:17 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

Delta flights from St. Louis to Madrid

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

Delta

Nov 29

STL6:00 amLambert-St Louis

20h 45m

1 stop

MAD9:45 amMadrid Barajas

Dec 17

MAD12:20 pmMadrid Barajas

18h 45m

1 stop

STL12:05 amLambert-St Louis

$731

Delta

Nov 24

STL2:31 pmLambert-St Louis

12h 14m

1 stop

MAD9:45 amMadrid Barajas

Dec 17

MAD10:50 amMadrid Barajas

20h 15m

2 stops

STL12:05 amLambert-St Louis

$733

Delta

Nov 28

STL7:18 pmLambert-St Louis

31h 27m

1 stop

MAD9:45 amMadrid Barajas

Dec 16

MAD12:20 pmMadrid Barajas

16h 18m

1 stop

STL9:38 pmLambert-St Louis

$736

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

$679

St. LouisMadrid

STL Lambert-St Louis - MAD Madrid Barajas

STLMAD

Lambert-St Louis

Sun 10/4

8:55 am-8:50 am

1 stop16h 55m

Madrid Barajas

Tue 10/20

1:30 pm-2:00 pm

1 stop31h 30m

$695

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

Wed 10/14

12:45 pm-3:43 pm

2 stops33h 58m

$709

St. LouisMadrid

STL Lambert-St Louis - MAD Madrid Barajas

STLMAD

Lambert-St Louis

Sun 11/29

6:00 am-9:15 am

1 stop20h 15m

Madrid Barajas

Wed 12/16

1:25 pm-10:42 am

2 stops28h 17m

$711

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

$723

St. LouisMadrid

STL Lambert-St Louis - MAD Madrid Barajas

STLMAD

Lambert-St Louis

Mon 9/28

1:49 pm-1:30 pm

1 stop16h 41m

Madrid Barajas

Fri 10/9

12:40 pm-11:59 pm

1 stop18h 19m

$731

St. LouisMadrid

STL Lambert-St Louis - MAD Madrid Barajas

STLMAD

Lambert-St Louis

Tue 9/29

5:00 pm-2:25 pm

1 stop14h 25m

Madrid Barajas

Fri 10/9

12:40 pm-11:59 pm

1 stop18h 19m

$731

St. LouisMadrid

STL Lambert-St Louis - MAD Madrid Barajas

STLMAD

Lambert-St Louis

Mon 9/28

6:30 am-5:35 am

1 stop16h 05m

Madrid Barajas

Fri 10/9

12:40 pm-11:59 pm

1 stop18h 19m

$731

St. LouisMadrid

STL Lambert-St Louis - MAD Madrid Barajas

STLMAD

Lambert-St Louis

Wed 12/9

10:04 am-9:45 am

1 stop16h 41m

Madrid Barajas

Wed 12/16

9:20 am-8:26 pm

1 stop18h 06m

$731

St. LouisMadrid

STL Lambert-St Louis - MAD Madrid Barajas

STLMAD

Lambert-St Louis

Mon 9/28

1:49 pm-12:40 pm

2 stops15h 51m

Madrid Barajas

Fri 10/9

12:40 pm-11:59 pm

1 stop18h 19m

$735

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 $679.

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 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	$331
Fastest flight time	11h 40m
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 $679.

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 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 8,226 reviews	Search Lufthansa flights
Delta	PriceFrom $489	Free Cancellation	Rating 7.8 8,551 reviews	Search Delta flights
British Airways	PriceFrom $516	Free Cancellation	Rating 6.7 8,197 reviews	Search British Airways flights
Iberia	PriceFrom $523	Free Cancellation	Rating 7.0 3,248 reviews	Search Iberia flights
American Airlines	PriceFrom $581	Free Cancellation	Rating 7.1 12,029 reviews	Search American Airlines flights
United Airlines	PriceFrom $586	Free Cancellation	Rating 7.4 10,160 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?

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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 2/22. 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

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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According to popular flight searches on momondo this year

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