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$317+ Cheap flights from St. Louis (STL) to Madrid, Spain (MAD)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 1/8. Fares are subject to change and may not be available on all flights or dates of travel.
STL — MAD
Nov 23 — Nov 301
Sun 11/23
Sun 11/30
1 adult, Economy
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1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

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Cheapflights Tip: The best prices from Lambert-St Louis to Madrid Barajas are usually found in November or February, booked 22 days in advance, depart on a Tuesday or Wednesday and return on a Wednesday

Find flight deals from St. Louis to Madrid

Cheapest flights from St. Louis to Madrid
Explore the most affordable flight options available from St. Louis to Madrid. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 24, 2025.

This Air France deal was found by Cheapflights users on 10/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/271:30 pmSTL - MAD
1 stop12h 35mMultiple Airlines
Wed 11/1210:00 amMAD - STL
1 stop13h 33mMultiple Airlines
Deal found 10/22$428
This Delta deal was found by Cheapflights users on 10/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/29:30 amSTL - MAD
1 stop16h 45mDelta
Tue 12/1611:15 amMAD - STL
1 stop14h 18mDelta
Deal found 10/22$429
This Delta deal was found by Cheapflights users on 10/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/271:30 pmSTL - MAD
1 stop12h 35mDelta
Wed 11/1210:00 amMAD - STL
2 stops17h 46mDelta
Deal found 10/22$443
This Expedia deal was found by Cheapflights users on 10/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/266:43 pmSTL - MAD
2 stops21h 52mMultiple Airlines
Fri 12/51:35 pmMAD - STL
2 stops31h 50mMultiple Airlines
Deal found 10/22$472
This United Airlines deal was found by Cheapflights users on 10/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/261:10 pmSTL - MAD
2 stops15h 35mUnited Airlines
Wed 12/101:35 pmMAD - STL
2 stops31h 48mUnited Airlines
Deal found 10/22$474
This KLM deal was found by Cheapflights users on 10/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/32:07 pmSTL - MAD
1 stop12h 08mKLM
Mon 12/811:15 amMAD - STL
1 stop16h 47mKLM
Deal found 10/23$479
This Delta deal was found by Cheapflights users on 10/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/116:09 pmSTL - MAD
2 stops16h 31mDelta
Wed 11/196:00 amMAD - STL
2 stops22h 58mDelta
Deal found 10/23$481
This Cheapflightsfares deal was found by Cheapflights users on 10/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/266:43 pmSTL - MAD
2 stops16h 07mLufthansa
Wed 12/105:55 amMAD - STL
1 stop15h 00mLufthansa
Deal found 10/22$482
This Cheapflightsfares deal was found by Cheapflights users on 10/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/56:43 pmSTL - MAD
2 stops21h 52mLufthansa
Wed 12/38:30 amMAD - STL
2 stops22h 12mLufthansa
Deal found 10/22$492

Cheap flight deals from St. Louis to Madrid

Discover tips and strategies to find the most affordable flight options for your journey from St. Louis (STL) to Madrid (MAD). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated October 24, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$429
(Delta)

One-way from

$317
(Kiwi.com)

Popular in

June

Cheapest in

November

Average price

$737
Provider with most accurate pricing for Lambert-St Louis-Madrid Barajas flight deals.
Search Deals
Provider most trusted by Cheapflights users for Lambert-St Louis-Madrid Barajas flights.
Search Deals
From Lambert-St Louis to Madrid Barajas
Search Deals
One-way flight from Lambert-St Louis to Madrid Barajas
Search Deals
Highest demand for flights based on searches. 18% potential increase in price ($210 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($29 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 2025
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from St. Louis to Madrid that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated October 24, 2025.
Use the filters below to find and compare flights from St. Louis to Madrid that are best for you.

Fly from

St. Louis

Fly to

Madrid

Route

Depart

Return

Price

St. LouisMadrid

STL - MAD

STLMAD

Lambert-St Louis

Sat 12/6

4:25 pm-8:00 am

1 stop32h 35m

Madrid Barajas

Tue 12/16

10:00 am-4:35 pm

1 stop13h 35m

$429

St. LouisMadrid

STL - MAD

STLMAD

Lambert-St Louis

Wed 12/3

2:07 pm-9:15 am

1 stop12h 08m

Madrid Barajas

Thu 12/11

10:00 am-4:35 pm

1 stop13h 35m

$429

St. LouisMadrid

STL - MAD

STLMAD

Lambert-St Louis

Tue 12/2

9:30 am-8:00 am

2 stops15h 30m

Madrid Barajas

Wed 12/10

10:00 am-8:47 pm

2 stops17h 47m

$429

St. LouisMadrid

STL - MAD

STLMAD

Lambert-St Louis

Tue 12/2

9:30 am-8:00 am

2 stops15h 30m

Madrid Barajas

Fri 12/12

10:00 am-9:02 pm

2 stops18h 02m

$429

St. LouisMadrid

STL - MAD

STLMAD

Lambert-St Louis

Tue 12/2

6:00 am-8:00 am

2 stops19h 00m

Madrid Barajas

Tue 12/16

10:00 am-4:35 pm

1 stop13h 35m

$429

St. LouisMadrid

STL - MAD

STLMAD

Lambert-St Louis

Mon 1/19

11:51 am-9:15 am

1 stop14h 24m

Madrid Barajas

Tue 1/27

11:15 am-6:04 pm

1 stop13h 49m

$438

St. LouisMadrid

STL - MAD

STLMAD

Lambert-St Louis

Mon 1/19

10:00 am-8:00 am

2 stops15h 00m

Madrid Barajas

Fri 1/30

10:00 am-8:39 pm

2 stops17h 39m

$443

St. LouisMadrid

STL - MAD

STLMAD

Lambert-St Louis

Mon 1/19

10:00 am-8:00 am

2 stops15h 00m

Madrid Barajas

Wed 1/28

10:00 am-8:39 pm

2 stops17h 39m

$443

St. LouisMadrid

STL - MAD

STLMAD

Lambert-St Louis

Sun 1/18

7:30 am-8:00 am

2 stops17h 30m

Madrid Barajas

Fri 1/30

10:00 am-8:39 pm

2 stops17h 39m

$443

St. LouisMadrid

STL - MAD

STLMAD

Lambert-St Louis

Sun 1/18

7:30 am-8:00 am

2 stops17h 30m

Madrid Barajas

Thu 1/29

11:15 am-8:39 pm

1 stop16h 24m

$443

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/22

Showing 1-10 of 19 results
1
2

Compare providers for flights from St. Louis to Madrid

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from St. Louis to Madrid in October.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*3 stars
ExpediaPrice Accuracy2 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy3 starsTrust Score*3 stars
OvagoPrice Accuracy2 starsTrust Score*2 stars
CheapflightsfaresPrice Accuracy2 starsTrust Score*1 star

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on St. Louis-Madrid flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on St. Louis-Madrid flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from St. Louis-Madrid flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on St. Louis-Madrid flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for St. Louis-Madrid flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from St. Louis to Madrid

Have a flexible travel schedule? Discover the best time to fly to Madrid from St. Louis with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from St. Louis to Madrid

How far ahead should I book a flight from St. Louis to Madrid?

Use this chart to determine the optimal time to book a round-trip flight from St. Louis to Madrid. Price data was last updated on October 17, 2025.

The best time to book flights from St. Louis to Madrid is 22 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

What is the cheapest month to book a flight from St. Louis to Madrid?

Currently, November is the cheapest month in which you can book a flight from St. Louis to Madrid (average of $546). Flying from St. Louis to Madrid in June is currently the most expensive (average of $907). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from STL to MAD?

Find hourly flight availability from St. Louis to Madrid. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated October 24, 2025.

One of the essential ways to save on airfare from St. Louis to Madrid is to remain as flexible as possible. Flights that are in the morning tend to be the most expensive. A flight at noon could potentially save you up to 17% on airfare.

How much does it cost to fly round-trip from St. Louis to Madrid?

Reviews of airlines servicing Madrid

Get insights into the airlines that provide service to Madrid. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Madrid. Reviews last updated October 24, 2025.
Get a feel of what it's like to fly with United Airlines, American Airlines, and Air Canada from St. Louis to Madrid by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
8,996 reviews

Food

6.6

Boarding

7.7

Entertainment

7.1

Overall

7.4

Crew

8.1

Comfort

7.3

Reviews

1 / 20
4.0
Okay

Tim,Sep 2025

IAD - GSP

This was pretty bad. It’s chaos at the Dulles boarding gates for the small regional jets because they use one gate to board 3-4 flights at a time. So, it’s difficult knowing where and when to go. There is little space for any size of carrry-on, so most had to gate check their bags. However, the worst of it was that our single flight attendant fell asleep before we took off and the pilot couldn’t do so until she responded to his messages. My wife had to wake her up! So we were a little late leaving. Not to be thwarted, the flight attendant fell asleep right after take off and there was no sight of her during the flight. When the aircraft touched down, a tray of unsecured canned drinks came crashing onto the aisle up front. I can only assume someone didn’t do what they were supposed to. The pilot was great, but I’m sure he must not be happy with this crew member.
United Airlines
7.4
Good
8,996 reviews
United Airlines
7.4
Good
8,996 reviews

Food

6.6

Boarding

7.7

Entertainment

7.1

Overall

7.4

Crew

8.1

Comfort

7.3

Reviews

1 / 20
4.0
Okay

Tim,Sep 2025

IAD - GSP

This was pretty bad. It’s chaos at the Dulles boarding gates for the small regional jets because they use one gate to board 3-4 flights at a time. So, it’s difficult knowing where and when to go. There is little space for any size of carrry-on, so most had to gate check their bags. However, the worst of it was that our single flight attendant fell asleep before we took off and the pilot couldn’t do so until she responded to his messages. My wife had to wake her up! So we were a little late leaving. Not to be thwarted, the flight attendant fell asleep right after take off and there was no sight of her during the flight. When the aircraft touched down, a tray of unsecured canned drinks came crashing onto the aisle up front. I can only assume someone didn’t do what they were supposed to. The pilot was great, but I’m sure he must not be happy with this crew member.
American Airlines
7.2
Good
11,034 reviews
United Airlines
7.4
Good
8,996 reviews

Food

6.6

Boarding

7.7

Entertainment

7.1

Overall

7.4

Crew

8.1

Comfort

7.3

Reviews

1 / 20
4.0
Okay

Tim,Sep 2025

IAD - GSP

This was pretty bad. It’s chaos at the Dulles boarding gates for the small regional jets because they use one gate to board 3-4 flights at a time. So, it’s difficult knowing where and when to go. There is little space for any size of carrry-on, so most had to gate check their bags. However, the worst of it was that our single flight attendant fell asleep before we took off and the pilot couldn’t do so until she responded to his messages. My wife had to wake her up! So we were a little late leaving. Not to be thwarted, the flight attendant fell asleep right after take off and there was no sight of her during the flight. When the aircraft touched down, a tray of unsecured canned drinks came crashing onto the aisle up front. I can only assume someone didn’t do what they were supposed to. The pilot was great, but I’m sure he must not be happy with this crew member.
Air Canada
7.1
Good
10,357 reviews
United Airlines
7.4
Good
8,996 reviews

Food

6.6

Boarding

7.7

Entertainment

7.1

Overall

7.4

Crew

8.1

Comfort

7.3

Reviews

1 / 20
4.0
Okay

Tim,Sep 2025

IAD - GSP

This was pretty bad. It’s chaos at the Dulles boarding gates for the small regional jets because they use one gate to board 3-4 flights at a time. So, it’s difficult knowing where and when to go. There is little space for any size of carrry-on, so most had to gate check their bags. However, the worst of it was that our single flight attendant fell asleep before we took off and the pilot couldn’t do so until she responded to his messages. My wife had to wake her up! So we were a little late leaving. Not to be thwarted, the flight attendant fell asleep right after take off and there was no sight of her during the flight. When the aircraft touched down, a tray of unsecured canned drinks came crashing onto the aisle up front. I can only assume someone didn’t do what they were supposed to. The pilot was great, but I’m sure he must not be happy with this crew member.
Iberia
7.0
Good
2,998 reviews
United Airlines
7.4
Good
8,996 reviews

Food

6.6

Boarding

7.7

Entertainment

7.1

Overall

7.4

Crew

8.1

Comfort

7.3

Reviews

1 / 20
4.0
Okay

Tim,Sep 2025

IAD - GSP

This was pretty bad. It’s chaos at the Dulles boarding gates for the small regional jets because they use one gate to board 3-4 flights at a time. So, it’s difficult knowing where and when to go. There is little space for any size of carrry-on, so most had to gate check their bags. However, the worst of it was that our single flight attendant fell asleep before we took off and the pilot couldn’t do so until she responded to his messages. My wife had to wake her up! So we were a little late leaving. Not to be thwarted, the flight attendant fell asleep right after take off and there was no sight of her during the flight. When the aircraft touched down, a tray of unsecured canned drinks came crashing onto the aisle up front. I can only assume someone didn’t do what they were supposed to. The pilot was great, but I’m sure he must not be happy with this crew member.
British Airways
6.7
Okay
7,472 reviews
United Airlines
7.4
Good
8,996 reviews

Food

6.6

Boarding

7.7

Entertainment

7.1

Overall

7.4

Crew

8.1

Comfort

7.3

Reviews

1 / 20
4.0
Okay

Tim,Sep 2025

IAD - GSP

This was pretty bad. It’s chaos at the Dulles boarding gates for the small regional jets because they use one gate to board 3-4 flights at a time. So, it’s difficult knowing where and when to go. There is little space for any size of carrry-on, so most had to gate check their bags. However, the worst of it was that our single flight attendant fell asleep before we took off and the pilot couldn’t do so until she responded to his messages. My wife had to wake her up! So we were a little late leaving. Not to be thwarted, the flight attendant fell asleep right after take off and there was no sight of her during the flight. When the aircraft touched down, a tray of unsecured canned drinks came crashing onto the aisle up front. I can only assume someone didn’t do what they were supposed to. The pilot was great, but I’m sure he must not be happy with this crew member.

Related info for your journey

Find useful and relevant information for your journey from St. Louis to Madrid. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from St. Louis to Madrid?

    A quick flight from St. Louis to Madrid can take about 12h 08m. Delta provides one of the quickest options available for as low as $429. The distance between St. Louis and Madrid is about 4414 mi.

  • What are the cheapest airlines flying from St. Louis to Madrid round-trip?

    According to our current data, Lufthansa ($524), British Airways ($546), and United Airlines ($578) offers the cheapest pricing from St. Louis to Madrid. You may be able to fly from St. Louis to Madrid for 42% less than the average price by searching for these airlines.

  • Can I find deals for flights from St. Louis to Madrid that include hotel bookings?

    Yes. In addition to deals on St. Louis to Madrid flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from St. Louis to Madrid?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from St. Louis to Madrid.

  • Can I find deals for business class flights from St. Louis to Madrid?

    Yes. Cheapflights offers flight deals from St. Louis to Madrid by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from St. Louis to Madrid?

    Currently, November is the cheapest month in which you can book a flight from St. Louis to Madrid (average of $546). Flying from St. Louis to Madrid in June is currently the most expensive (average of $907). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near Madrid?

Book flights to Madrid if you plan to visit one of these locations
Fuenlabrada
Getafe

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Alternative routes for St. Louis to Madrid

See prices for flight routes from nearby airports that may be better suited for you.
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Top 7 airlines flying from St. Louis to Madrid

Discover the top 7 airlines that operate flights from St. Louis to Madrid. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated October 24, 2025.
AirlineCheapestAverageFlexibilityOn-time
LufthansaCheapest$524Average$762FlexibilityNo cancel feeOn-time76%
British AirwaysCheapest$546Average$732FlexibilityNo cancel feeOn-time70%
United AirlinesCheapest$578Average$942FlexibilityNo cancel feeOn-time69%
IberiaCheapest$586Average$911FlexibilityNo cancel feeOn-time77%
DeltaCheapest$589Average$788FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$634Average$1,014FlexibilityNo cancel feeOn-time71%
Air CanadaCheapest$701Average$947FlexibilityNo cancel feeOn-time67%

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