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

United Airlines, Aer Lingus, and Air Canada 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: 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 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.

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.

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.

$341 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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4:05 pm - 8:00 amSTL Lambert-St Louis-MAD Madrid Barajas

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

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

14h 40m1 stop Frankfurt am Main

$707Multiple Airlines

Mon, Nov 2 - 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 - 3:43 pmMAD Madrid Barajas-STL Lambert-St Louis

33h 18m2 stops Montreal Pierre Elliott Trudeau Intl Chicago O'Hare Intl

$710United Airlines

Mon, Nov 9 - Tue, Nov 17

11:29 am - 9:30 amSTL Lambert-St Louis-MAD Madrid Barajas

15h 01m1 stop Newark

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

14h 40m1 stop Frankfurt am Main

$711Lufthansa

Mon, Nov 2 - Wed, Nov 18

4:05 pm - 8:00 amSTL Lambert-St Louis-MAD Madrid Barajas

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

1:25 pm - 2:34 pmMAD Madrid Barajas-STL Lambert-St Louis

32h 09m2 stops Montreal Pierre Elliott Trudeau Intl Chicago O'Hare Intl

$713Air Canada

Mon, Nov 2 - Wed, Nov 18

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

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

1:25 pm - 5:06 pmMAD Madrid Barajas-STL Lambert-St Louis

34h 41m2 stops Montreal Pierre Elliott Trudeau Intl Chicago O'Hare Intl

$720United Airlines

Mon, Mar 1 - Thu, Mar 4

10:53 am - 7:45 amSTL Lambert-St Louis-MAD Madrid Barajas

13h 52m2 stops Chicago O'Hare Intl Washington, D.C. Dulles Intl

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

14h 40m1 stop Frankfurt am Main

$721Lufthansa

Mon, Nov 2 - Wed, Nov 18

9:58 am - 11:00 amSTL Lambert-St Louis-MAD Madrid Barajas

18h 02m2 stops Boston Logan Intl London Heathrow

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

14h 16m1 stop Philadelphia

$726British Airways

Mon, Feb 1 - Wed, Feb 10

7:21 am - 12:15 pmSTL Lambert-St Louis-MAD Madrid Barajas

21h 54m2 stops Chicago O'Hare Intl London Heathrow

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

14h 16m1 stop Philadelphia

$728British Airways

Tue, Jan 26 - Tue, Feb 2

10:00 am - 8:50 amSTL Lambert-St Louis-MAD Madrid Barajas

15h 50m1 stop Boston Logan Intl

7:30 pm - 8:31 pmMAD Madrid Barajas-STL Lambert-St Louis

32h 01m2 stops London Heathrow Philadelphia

$728Iberia

Tue, Jan 5 - Mon, Jan 25

10:00 am - 8:50 amSTL Lambert-St Louis-MAD Madrid Barajas

15h 50m1 stop Boston Logan Intl

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

14h 16m1 stop Philadelphia

$762Iberia

Tue, Jan 5 - Mon, Jan 25

Cheap last minute flights

Enter your travel dates to find the best prices.

9:35 pm - 5:35 pmSTL Lambert-St Louis-MAD Madrid Barajas

13h 00m1 stop London Heathrow

10:35 am - 7:30 pmMAD Madrid Barajas-STL Lambert-St Louis

15h 55m1 stop London Heathrow

$791British Airways

Wed, Oct 7 - Wed, Oct 21

9:35 pm - 5:35 pmSTL Lambert-St Louis-MAD Madrid Barajas

13h 00m1 stop London Heathrow

7:00 am - 5:39 pmMAD Madrid Barajas-STL Lambert-St Louis

17h 39m2 stops London Heathrow Boston Logan Intl

$872British Airways

Wed, Oct 7 - Wed, Oct 21

3:30 pm - 7:30 pmSTL Lambert-St Louis-MAD Madrid Barajas

21h 00m1 stop Frankfurt am Main

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

14h 40m1 stop Frankfurt am Main

$922Lufthansa

Mon, Oct 5 - Fri, Oct 30

1:09 pm - 5:40 pmSTL Lambert-St Louis-MAD Madrid Barajas

21h 31m2 stops Washington, D.C. Dulles Intl Munich Franz Josef Strauss

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

14h 40m1 stop Frankfurt am Main

$928Lufthansa

Mon, Oct 5 - Fri, Oct 30

12:20 pm - 9:00 amSTL Lambert-St Louis-MAD Madrid Barajas

13h 40m1 stop Newark

12:45 pm - 3:43 pmMAD Madrid Barajas-STL Lambert-St Louis

33h 58m2 stops Montreal Pierre Elliott Trudeau Intl Chicago O'Hare Intl

$929United Airlines

Wed, Oct 7 - Wed, Oct 21

8:30 am - 9:00 amSTL Lambert-St Louis-MAD Madrid Barajas

17h 30m2 stops Washington, D.C. Dulles Intl Newark

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

14h 30m1 stop Frankfurt am Main

$943United Airlines

Wed, Oct 7 - Wed, Oct 21

12:28 pm - 11:20 amSTL Lambert-St Louis-MAD Madrid Barajas

15h 52m2 stops Minneapolis St Paul Paris Charles de Gaulle

6:00 am - 4:43 pmMAD Madrid Barajas-STL Lambert-St Louis

17h 43m2 stops Amsterdam Schiphol Minneapolis St Paul

$954Delta

Wed, Oct 7 - Wed, Oct 21

12:00 pm - 11:20 amSTL Lambert-St Louis-MAD Madrid Barajas

16h 20m2 stops Atlanta Hartsfield-Jackson Paris Charles de Gaulle

6:00 am - 8:51 pmMAD Madrid Barajas-STL Lambert-St Louis

21h 51m2 stops Amsterdam Schiphol Detroit Metropolitan Wayne County

$954Delta

Wed, Oct 7 - Wed, Oct 21

2:40 pm - 7:25 pmSTL Lambert-St Louis-MAD Madrid Barajas

21h 45m3 stops Toronto Pearson Intl Dublin London Stansted

8:35 pm - 11:16 pmMAD Madrid Barajas-STL Lambert-St Louis

32h 41m2 stops Dublin Orlando

$1,508Multiple Airlines

Mon, Oct 5 - Fri, Oct 30

12:10 pm - 11:50 amSTL Lambert-St Louis-MAD Madrid Barajas

16h 40m2 stops Montreal Pierre Elliott Trudeau Intl Brussels Bruxelles-National

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

12h 56m1 stop Montreal Pierre Elliott Trudeau Intl

$2,182Air Canada

Wed, Oct 7 - Sat, Oct 17

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Lufthansa flights from St. Louis to Madrid

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

Lufthansa

Nov 2

STL11:29 amLambert-St Louis

15h 01m

1 stop

MAD9:30 amMadrid Barajas

Nov 18

MAD6:05 amMadrid Barajas

14h 40m

1 stop

STL1:45 pmLambert-St Louis

$711

Lufthansa

Nov 2

STL10:53 amLambert-St Louis

13h 52m

2 stops

MAD7:45 amMadrid Barajas

Nov 18

MAD6:05 amMadrid Barajas

14h 40m

1 stop

STL1:45 pmLambert-St Louis

$721

Lufthansa

Nov 2

STL8:00 amLambert-St Louis

16h 45m

1 stop

MAD7:45 amMadrid Barajas

Nov 18

MAD6:05 amMadrid Barajas

14h 40m

1 stop

STL1:45 pmLambert-St Louis

$732

Air Canada flights from St. Louis to Madrid

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

Air Canada

Nov 2

STL4:05 pmLambert-St Louis

32h 55m

2 stops

MAD8:00 amMadrid Barajas

Nov 18

MAD1:25 pmMadrid Barajas

32h 09m

2 stops

STL2:34 pmLambert-St Louis

$713

Air Canada

Mar 1

STL6:00 amLambert-St Louis

19h 00m

2 stops

MAD8:00 amMadrid Barajas

Mar 4

MAD1:25 pmMadrid Barajas

32h 37m

2 stops

STL3:02 pmLambert-St Louis

$723

Air Canada

Feb 1

STL4:05 pmLambert-St Louis

32h 55m

2 stops

MAD8:00 amMadrid Barajas

Feb 10

MAD1:25 pmMadrid Barajas

38h 47m

2 stops

STL9:12 pmLambert-St Louis

$727

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 11/2

4:05 pm-8:00 am

2 stops32h 55m

Madrid Barajas

Wed 11/18

6:05 am-1:45 pm

1 stop14h 40m

$707

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

Tue 11/17

1:25 pm-3:43 pm

2 stops33h 18m

$710

St. LouisMadrid

STL Lambert-St Louis - MAD Madrid Barajas

STLMAD

Lambert-St Louis

Mon 11/2

11:29 am-9:30 am

1 stop15h 01m

Madrid Barajas

Wed 11/18

6:05 am-1:45 pm

1 stop14h 40m

$711

St. LouisMadrid

STL Lambert-St Louis - MAD Madrid Barajas

STLMAD

Lambert-St Louis

Mon 11/2

4:05 pm-8:00 am

2 stops32h 55m

Madrid Barajas

Wed 11/18

1:25 pm-2:34 pm

2 stops32h 09m

$713

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-5:06 pm

2 stops34h 41m

$720

Quickest round-trip

St. LouisMadrid

STL Lambert-St Louis - MAD Madrid Barajas

STLMAD

Lambert-St Louis

Mon 11/2

10:53 am-7:45 am

2 stops13h 52m

Madrid Barajas

Wed 11/18

6:05 am-1:45 pm

1 stop14h 40m

$721

St. LouisMadrid

STL Lambert-St Louis - MAD Madrid Barajas

STLMAD

Lambert-St Louis

Mon 2/1

9:58 am-11:00 am

2 stops18h 02m

Madrid Barajas

Wed 2/10

1:15 pm-8:31 pm

1 stop14h 16m

$726

St. LouisMadrid

STL Lambert-St Louis - MAD Madrid Barajas

STLMAD

Lambert-St Louis

Tue 1/26

7:21 am-12:15 pm

2 stops21h 54m

Madrid Barajas

Tue 2/2

1:15 pm-8:31 pm

1 stop14h 16m

$728

St. LouisMadrid

STL Lambert-St Louis - MAD Madrid Barajas

STLMAD

Lambert-St Louis

Tue 1/5

10:00 am-8:50 am

1 stop15h 50m

Madrid Barajas

Mon 1/25

7:30 pm-8:31 pm

2 stops32h 01m

$728

St. LouisMadrid

STL Lambert-St Louis - MAD Madrid Barajas

STLMAD

Lambert-St Louis

Tue 1/5

10:00 am-8:50 am

1 stop15h 50m

Madrid Barajas

Mon 1/25

1:15 pm-8:31 pm

1 stop14h 16m

$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 $813.
The lowest price recently found on this route was $707.

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 $755 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 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	$341
Fastest flight time	11h 45m
Direct flights	None

The best one-way flight to Madrid from St. Louis in the past 72 hours is $341. The best round-trip flight deal from St. Louis to Madrid found on momondo in the last 72 hours is $707.

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 29%, 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 8,628 reviews	Search Delta flights
Lufthansa	PriceFrom $494	Free Cancellation	Rating 6.8 8,256 reviews	Search Lufthansa flights
British Airways	PriceFrom $516	Free Cancellation	Rating 6.7 8,244 reviews	Search British Airways flights
Iberia	PriceFrom $523	Free Cancellation	Rating 7.0 3,256 reviews	Search Iberia flights
American Airlines	PriceFrom $581	Free Cancellation	Rating 7.0 12,125 reviews	Search American Airlines flights
United Airlines	PriceFrom $623	Free Cancellation	Rating 7.4 10,281 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 $341

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 3/7. 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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Lufthansa flights from St. Louis to Madrid

Our best Lufthansa 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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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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