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

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

Which layover airport offers the lowest fares from St. Louis to Madrid?

Flights via Frankfurt am Main (FRA) offer the lowest average round-trip price of $715.

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 31% of people opting to fly with this airline when traveling to Madrid. Keep in mind that there are 7 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: 58% 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 55m.

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 36m.

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 7 as of April 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.

$330 Cheap Flights from St. Louis to Madrid in 2026

Q: 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 $1,139 to $947. The lowest price recently found on this route was $702.

1 adult

0 bags

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.

8:55 am - 8:50 am

STL

MAD

16h 55m

1 stop

5:55 am - 1:25 pm

MAD

STL

14h 30m

1 stop

$702Multiple Airlines

tir., okt. 6 - tir., okt. 20

12:10 pm - 6:50 am

STL

MAD

11h 40m

1 stop

12:45 pm - 11:06 am

MAD

STL

29h 21m

2 stops

$715United Airlines

man., aug. 17 - fre., sep. 18

6:00 am - 6:50 am

STL

MAD

17h 50m

2 stops

12:45 pm - 11:06 am

MAD

STL

29h 21m

2 stops

$719United Airlines

man., aug. 17 - fre., sep. 18

9:35 pm - 8:05 pm

STL

MAD

15h 30m

1 stop

10:35 am - 7:30 pm

MAD

STL

15h 55m

1 stop

$720British Airways

ons., okt. 7 - ons., okt. 21

11:59 am - 9:00 am

STL

MAD

14h 01m

1 stop

1:30 pm - 4:26 pm

MAD

STL

33h 56m

2 stops

$721United Airlines

tir., sep. 29 - fre., okt. 9

9:35 pm - 5:35 pm

STL

MAD

13h 00m

1 stop

1:15 pm - 11:41 pm

MAD

STL

16h 26m

1 stop

$723British Airways

ons., okt. 21 - fre., okt. 30

12:10 pm - 6:50 am

STL

MAD

11h 40m

1 stop

6:00 am - 1:25 pm

MAD

STL

14h 25m

1 stop

$725Multiple Airlines

man., aug. 17 - fre., sep. 18

9:23 am - 8:05 am

STL

MAD

15h 42m

2 stops

1:30 pm - 2:18 pm

MAD

STL

31h 48m

2 stops

$726United Airlines

tir., okt. 6 - tir., okt. 20

7:30 am - 9:50 am

STL

MAD

19h 20m

2 stops

1:30 pm - 4:26 pm

MAD

STL

33h 56m

2 stops

$729United Airlines

ons., okt. 7 - ons., okt. 21

11:45 am - 8:05 am

STL

MAD

13h 20m

2 stops

6:00 am - 2:55 pm

MAD

STL

14h 55m

1 stop

$731United Airlines

ons., okt. 21 - fre., okt. 30

Save money when you book flights with momondo

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Not ready to book? to track prices.

Search flight deals

American Airlines flights from St. Louis to Madrid

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

American Airlines

Sep 29

STL2:12 pmLambert-St Louis

12h 23m

1 stop

MAD9:35 amMadrid Barajas

Oct 9

MAD3:55 pmMadrid Barajas

14h 46m

1 stop

STL11:41 pmLambert-St Louis

$736

American Airlines

Sep 18

STL9:46 amLambert-St Louis

14h 04m

1 stop

MAD6:50 amMadrid Barajas

Oct 6

MAD1:35 pmMadrid Barajas

13h 33m

1 stop

STL8:08 pmLambert-St Louis

$816

American Airlines

Sep 18

STL9:46 amLambert-St Louis

14h 04m

1 stop

MAD6:50 amMadrid Barajas

Oct 5

MAD3:25 pmMadrid Barajas

15h 16m

1 stop

STL11:41 pmLambert-St Louis

$866

British Airways flights from St. Louis to Madrid

Our best British Airways deals on St. Louis to Madrid flight tickets

British Airways

Oct 7

STL9:35 pmLambert-St Louis

15h 30m

1 stop

MAD8:05 pmMadrid Barajas

Oct 21

MAD10:35 amMadrid Barajas

15h 55m

1 stop

STL7:30 pmLambert-St Louis

$720

British Airways

Oct 21

STL9:35 pmLambert-St Louis

13h 00m

1 stop

MAD5:35 pmMadrid Barajas

Oct 30

MAD1:15 pmMadrid Barajas

16h 26m

1 stop

STL11:41 pmLambert-St Louis

$723

British Airways

Oct 7

STL7:38 amLambert-St Louis

25h 12m

2 stops

MAD3:50 pmMadrid Barajas

Oct 21

MAD3:25 pmMadrid Barajas

15h 16m

1 stop

STL11:41 pmLambert-St Louis

$771

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

St. LouisMadrid

STL - MAD

STLMAD

Lambert-St Louis

tir. 10/6

8:55 am-8:50 am

1 stop16h 55m

Madrid Barajas

tir. 10/20

5:55 am-1:25 pm

1 stop14h 30m

$702

St. LouisMadrid

STL - MAD

STLMAD

Lambert-St Louis

man. 8/17

12:10 pm-6:50 am

1 stop11h 40m

Madrid Barajas

fre. 9/18

12:45 pm-11:06 am

2 stops29h 21m

$715

St. LouisMadrid

STL - MAD

STLMAD

Lambert-St Louis

man. 8/17

6:00 am-6:50 am

2 stops17h 50m

Madrid Barajas

fre. 9/18

12:45 pm-11:06 am

2 stops29h 21m

$719

St. LouisMadrid

STL - MAD

STLMAD

Lambert-St Louis

ons. 10/7

9:35 pm-8:05 pm

1 stop15h 30m

Madrid Barajas

ons. 10/21

10:35 am-7:30 pm

1 stop15h 55m

$720

St. LouisMadrid

STL - MAD

STLMAD

Lambert-St Louis

tir. 9/29

11:59 am-9:00 am

1 stop14h 01m

Madrid Barajas

fre. 10/9

1:30 pm-4:26 pm

2 stops33h 56m

$721

St. LouisMadrid

STL - MAD

STLMAD

Lambert-St Louis

ons. 10/21

9:35 pm-5:35 pm

1 stop13h 00m

Madrid Barajas

fre. 10/30

1:15 pm-11:41 pm

1 stop16h 26m

$723

Quickest round-trip

St. LouisMadrid

STL - MAD

STLMAD

Lambert-St Louis

man. 8/17

12:10 pm-6:50 am

1 stop11h 40m

Madrid Barajas

fre. 9/18

6:00 am-1:25 pm

1 stop14h 25m

$725

St. LouisMadrid

STL - MAD

STLMAD

Lambert-St Louis

tir. 10/6

9:23 am-8:05 am

2 stops15h 42m

Madrid Barajas

tir. 10/20

1:30 pm-2:18 pm

2 stops31h 48m

$726

St. LouisMadrid

STL - MAD

STLMAD

Lambert-St Louis

ons. 10/7

7:30 am-9:50 am

2 stops19h 20m

Madrid Barajas

ons. 10/21

1:30 pm-4:26 pm

2 stops33h 56m

$729

St. LouisMadrid

STL - MAD

STLMAD

Lambert-St Louis

ons. 10/21

11:45 am-8:05 am

2 stops13h 20m

Madrid Barajas

fre. 10/30

6:00 am-2:55 pm

1 stop14h 55m

$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?

What is the cheapest month to fly to Madrid?

The month of November is, on average, the cheapest month to fly to Madrid from St. Louis, with most prices found around $633. If you don’t want to visit Madrid in November, then you should wait until February to fly from St. Louis, when ticket prices are also cheap, with an average price of $636.

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 $796 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 $694 on momondo.

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

You could potentially save up to 46% 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?

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

Fastest flight time	10h 45m
Direct flights	None

The fastest flight from St. Louis to Madrid takes 10h 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. 10h 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 7 as of April 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 27% of all bookings. The subsequent popular airlines are British Airways at 25%, Iberia at 22%, and United Airlines at 13%.

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 7,959 reviews	Search Lufthansa flights
Delta	PriceFrom $489	Free Cancellation	Rating 7.9 8,466 reviews	Search Delta flights
British Airways	PriceFrom $516	Free Cancellation	Rating 6.7 7,931 reviews	Search British Airways flights
Iberia	PriceFrom $568	Free Cancellation	Rating 7.0 3,202 reviews	Search Iberia flights
United Airlines	PriceFrom $578	Free Cancellation	Rating 7.4 9,675 reviews	Search United Airlines flights
American Airlines	PriceFrom $581	Free Cancellation	Rating 7.1 11,677 reviews	Search American Airlines flights
Air Canada	PriceFrom $659	Free Cancellation	Rating 7.1 10,976 reviews	Search Air Canada flights

Toledo

Segovia

Fuenlabrada

Getafe

Cuenca

San Lorenzo de El Escorial

Guadalajara

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.

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.

Start using Trips

Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

1 adult

tor. 5/28

tor. 6/4

Email me momondo's favorite deals

By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to Spain

Airlines

Cabin classes

Other Spain destinations

Other flights from St. Louis

Complete your trip

Feeling lucky

Fly your favorite airline to Madrid

Cheap flights from St. Louis to Madrid from $450

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 5/9. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

Find the cheapest flights from St. Louis to Madrid

Cheap round-trip flights

Cheap one-way flights

Cheap last minute flights

Big names and deals

Big names and deals

Filter for what you want

Filter for what you want

Trusted and free

Trusted and free

Price Alerts

Price Alerts

American Airlines flights from St. Louis to Madrid

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

British Airways flights from St. Louis to Madrid

Our best British Airways deals on St. Louis to Madrid flight tickets

momondo Fare Finder

Use the filters below to find and compare flights from St. Louis to Madrid that are best for you.

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

Find info about flight duration, direct flights, and airports for your flight from St. Louis to Madrid

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.

Popular cities in Spain

Popular flights according to clicks in the last 7 days on momondo

Fly to other destinations from St. Louis

According to popular flight searches on momondo this year

Complete your trip to Madrid

Explore popular destinations other users love

According to popular flight searches on momondo this year