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$399+ 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 12/31. Fares are subject to change and may not be available on all flights or dates of travel.
STL — MAD
Dec 6 — Dec 131
Sat 12/6
Sat 12/13
1 adult, Economy
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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 November 6, 2025.

This United Airlines deal was found by Cheapflights users on 11/5. 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 12/36:42 pmSTL - MAD
2 stops30h 18mUnited Airlines
Wed 12/101:35 pmMAD - STL
2 stops33h 05mUnited Airlines
Deal found 11/5$465
This KLM deal was found by Cheapflights users on 11/5. 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 12/34:32 pmSTL - MAD
1 stop32h 28mKLM
Wed 12/1011:15 amMAD - STL
1 stop17h 42mKLM
Deal found 11/5$468
This Delta deal was found by Cheapflights users on 11/5. 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.
Wed 12/310:45 amSTL - MAD
2 stops18h 25mDelta
Wed 12/1011:15 amMAD - STL
1 stop14h 18mDelta
Deal found 11/5$469
This United Airlines deal was found by Cheapflights users on 11/5. 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 12/36:42 pmSTL - MAD
2 stops30h 18mUnited Airlines
Mon 12/86:00 amMAD - STL
2 stops23h 45mUnited Airlines
Deal found 11/5$478
This KLM deal was found by Cheapflights users on 11/5. 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 12/34:32 pmSTL - MAD
1 stop32h 28mKLM
Mon 12/811:15 amMAD - STL
1 stop35h 51mKLM
Deal found 11/5$479
This United Airlines deal was found by Cheapflights users on 11/5. 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.
Mon 12/16:43 pmSTL - MAD
2 stops30h 17mUnited Airlines
Tue 12/166:00 amMAD - STL
2 stops22h 40mUnited Airlines
Deal found 11/5$487
This Delta deal was found by Cheapflights users on 11/5. 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.
Wed 12/310:45 amSTL - MAD
2 stops16h 30mDelta
Mon 12/810:00 amMAD - STL
1 stop13h 35mDelta
Deal found 11/5$494
This KAYAK deal was found by Cheapflights users on 11/5. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/236:43 pmSTL - MAD
2 stops22h 07mLufthansa
Tue 12/25:05 pmMAD - STL
1 stop27h 50mLufthansa
Deal found 11/5$520
This Cheapflightsfares deal was found by Cheapflights users on 11/5. 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.
Fri 11/73:50 pmSTL - MAD
1 stop14h 35mLufthansa
Wed 11/125:55 amMAD - STL
1 stop15h 00mLufthansa
Deal found 11/5$532

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 November 6, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$429
(Delta)

One-way from

$399
(United Airlines)

Popular in

June

Cheapest in

November

Average price

$624
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 ($212 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($30 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in November 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 November 6, 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

Wed 12/3

6:42 pm-8:00 am

2 stops30h 18m

Madrid Barajas

Wed 12/10

1:35 pm-3:40 pm

2 stops33h 05m

$465

St. LouisMadrid

STL - MAD

STLMAD

Lambert-St Louis

Wed 12/3

2:48 pm-2:15 pm

2 stops16h 27m

Madrid Barajas

Mon 12/8

1:15 pm-8:38 pm

1 stop14h 23m

$468

St. LouisMadrid

STL - MAD

STLMAD

Lambert-St Louis

Wed 12/3

6:42 pm-8:00 am

2 stops30h 18m

Madrid Barajas

Mon 12/8

6:00 am-10:45 pm

2 stops23h 45m

$478

St. LouisMadrid

STL - MAD

STLMAD

Lambert-St Louis

Wed 12/3

4:32 pm-8:00 am

1 stop32h 28m

Madrid Barajas

Mon 12/8

11:15 am-4:06 pm

1 stop35h 51m

$479

St. LouisMadrid

STL - MAD

STLMAD

Lambert-St Louis

Thu 1/8

7:15 am-6:15 am

1 stop16h 00m

Madrid Barajas

Thu 1/22

1:15 pm-10:44 pm

1 stop16h 29m

$483

St. LouisMadrid

STL - MAD

STLMAD

Lambert-St Louis

Thu 1/8

2:54 pm-12:40 pm

2 stops14h 46m

Madrid Barajas

Thu 1/22

12:40 pm-6:34 pm

1 stop12h 54m

$484

St. LouisMadrid

STL - MAD

STLMAD

Lambert-St Louis

Mon 12/1

6:43 pm-8:00 am

2 stops30h 17m

Madrid Barajas

Tue 12/16

6:00 am-9:40 pm

2 stops22h 40m

$487

St. LouisMadrid

STL - MAD

STLMAD

Lambert-St Louis

Wed 12/3

10:45 am-12:10 pm

2 stops18h 25m

Madrid Barajas

Mon 12/8

10:00 am-8:47 pm

2 stops17h 47m

$524

St. LouisMadrid

STL - MAD

STLMAD

Lambert-St Louis

Thu 3/19

2:21 pm-10:20 am

1 stop13h 59m

Madrid Barajas

Thu 3/26

1:15 pm-8:18 pm

1 stop13h 03m

$593

St. LouisMadrid

STL - MAD

STLMAD

Lambert-St Louis

Fri 3/20

2:21 pm-10:20 am

1 stop13h 59m

Madrid Barajas

Tue 3/31

11:35 am-9:48 pm

1 stop17h 13m

$593

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/5

Showing 1-10 of 16 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 November.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy2 starsTrust Score*3 stars
OvagoPrice Accuracy2 starsTrust Score*2 stars
CheapflightsfaresPrice Accuracy3 starsTrust Score*2 stars

*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 eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on St. Louis-Madrid flight deals on Cheapflights vs. eDreams >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 eDreams the most. eDreams 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

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 $534). 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 November 6, 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.

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 November 6, 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
9,007 reviews

Entertainment

7.1

Comfort

7.3

Boarding

7.7

Food

6.6

Crew

8.1

Overall

7.4

Reviews

1 / 20
2.0
Mediocre

Sebrena,Oct 2025

IAH - RSW

The worst that I have ever experienced in my life so bad if it was free I'm not ever going to use your Airline again I dont believe ..... very disappointed 😞 😔0000000000000
United Airlines
7.4
Good
9,007 reviews
United Airlines
7.4
Good
9,007 reviews

Entertainment

7.1

Comfort

7.3

Boarding

7.7

Food

6.6

Crew

8.1

Overall

7.4

Reviews

1 / 20
2.0
Mediocre

Sebrena,Oct 2025

IAH - RSW

The worst that I have ever experienced in my life so bad if it was free I'm not ever going to use your Airline again I dont believe ..... very disappointed 😞 😔0000000000000
American Airlines
7.2
Good
11,040 reviews
United Airlines
7.4
Good
9,007 reviews

Entertainment

7.1

Comfort

7.3

Boarding

7.7

Food

6.6

Crew

8.1

Overall

7.4

Reviews

1 / 20
2.0
Mediocre

Sebrena,Oct 2025

IAH - RSW

The worst that I have ever experienced in my life so bad if it was free I'm not ever going to use your Airline again I dont believe ..... very disappointed 😞 😔0000000000000
Air Canada
7.1
Good
10,416 reviews
United Airlines
7.4
Good
9,007 reviews

Entertainment

7.1

Comfort

7.3

Boarding

7.7

Food

6.6

Crew

8.1

Overall

7.4

Reviews

1 / 20
2.0
Mediocre

Sebrena,Oct 2025

IAH - RSW

The worst that I have ever experienced in my life so bad if it was free I'm not ever going to use your Airline again I dont believe ..... very disappointed 😞 😔0000000000000
Iberia
7.0
Good
3,007 reviews
United Airlines
7.4
Good
9,007 reviews

Entertainment

7.1

Comfort

7.3

Boarding

7.7

Food

6.6

Crew

8.1

Overall

7.4

Reviews

1 / 20
2.0
Mediocre

Sebrena,Oct 2025

IAH - RSW

The worst that I have ever experienced in my life so bad if it was free I'm not ever going to use your Airline again I dont believe ..... very disappointed 😞 😔0000000000000
British Airways
6.7
Okay
7,500 reviews
United Airlines
7.4
Good
9,007 reviews

Entertainment

7.1

Comfort

7.3

Boarding

7.7

Food

6.6

Crew

8.1

Overall

7.4

Reviews

1 / 20
2.0
Mediocre

Sebrena,Oct 2025

IAH - RSW

The worst that I have ever experienced in my life so bad if it was free I'm not ever going to use your Airline again I dont believe ..... very disappointed 😞 😔0000000000000

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 16h. United Airlines provides one of the quickest options available for as low as $483. The distance between St. Louis and Madrid is about 4414 mi. This flight may include one or multiple stops.

  • 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 $534). 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
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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Columbia to Madrid flights

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 November 6, 2025.
AirlineCheapestAverageFlexibilityOn-time
LufthansaCheapest$524Average$758FlexibilityNo cancel feeOn-time76%
British AirwaysCheapest$546Average$735FlexibilityNo cancel feeOn-time70%
United AirlinesCheapest$578Average$937FlexibilityNo cancel feeOn-time69%
IberiaCheapest$586Average$911FlexibilityNo cancel feeOn-time77%
DeltaCheapest$589Average$788FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$636Average$1,006FlexibilityNo cancel feeOn-time71%
Air CanadaCheapest$701Average$947FlexibilityNo cancel feeOn-time67%

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