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$376+ 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 11/7. Fares are subject to change and may not be available on all flights or dates of travel.
STL — MAD
Oct 17 — Oct 241
Fri 10/17
Fri 10/24
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 January, booked 28 days in advance, depart on a Tuesday or Wednesday and return on a Wednesday

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 September 17, 2025.

Round-trip from

$417
(Mytrip)

One-way from

$376
(FlightHub)

Popular in

December

Cheapest in

November

Average price

$786
From Lambert-St Louis to Madrid Barajas
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One-way flight from Lambert-St Louis to Madrid Barajas
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High demand for flights, 5% potential price rise
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Cheapest flight prices on average. 3% potential price decrease ($30 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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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 September 17, 2025.

This Mytrip deal was found by Cheapflights users on 9/15. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/61:30 pmSTL - MAD
1 stop10h 10mAir Canada
Wed 10/2212:45 pmMAD - STL
2 stops33h 33mAir Canada
Deal found 9/15$417
This United Airlines deal was found by Cheapflights users on 9/16. 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.
Sun 10/121:30 pmSTL - MAD
1 stop10h 10mUnited Airlines
Wed 10/2212:45 pmMAD - STL
2 stops32h 42mUnited Airlines
Deal found 9/16$418
This eDestinos deal was found by Cheapflights users on 9/15. 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 eDestinos is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/32:48 pmSTL - MAD
1 stop12h 32mIberia
Mon 12/811:35 amMAD - STL
1 stop14h 31mIberia
Deal found 9/15$419
This United Airlines deal was found by Cheapflights users on 9/15. 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.
Sat 11/16:43 pmSTL - MAD
2 stops31h 17mUnited Airlines
Fri 11/141:35 pmMAD - STL
2 stops33h 11mUnited Airlines
Deal found 9/15$422
This Delta deal was found by Cheapflights users on 9/15. 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 10/66:00 amSTL - MAD
2 stops18h 50mDelta
Wed 10/2212:40 pmMAD - STL
2 stops28h 46mDelta
Deal found 9/15$437
This Finnair deal was found by Cheapflights users on 9/16. 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 Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/54:41 pmSTL - MAD
1 stop13h 24mMultiple Airlines
Wed 11/1911:35 amMAD - STL
1 stop15h 48mMultiple Airlines
Deal found 9/16$445
This Justfly.com deal was found by Cheapflights users on 9/16. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/229:15 amSTL - MAD
1 stop16h 05mMultiple Airlines
Fri 10/316:00 amMAD - STL
1 stop14h 55mMultiple Airlines
Deal found 9/16$462
This United Airlines deal was found by Cheapflights users on 9/15. 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 10/61:30 pmSTL - MAD
1 stop10h 10mUnited Airlines
Wed 10/2212:45 pmMAD - STL
2 stops29h 04mUnited Airlines
Deal found 9/15$464

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 September 17, 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

Sun 10/12

1:30 pm-6:40 am

1 stop10h 10m

Madrid Barajas

Wed 10/22

12:45 pm-2:27 pm

2 stops32h 42m

$418

St. LouisMadrid

STL - MAD

STLMAD

Lambert-St Louis

Sat 10/11

4:05 pm-8:20 am

1 stop33h 15m

Madrid Barajas

Wed 10/22

12:30 pm-3:18 pm

1 stop33h 48m

$444

St. LouisMadrid

STL - MAD

STLMAD

Lambert-St Louis

Tue 10/7

9:15 am-8:20 am

1 stop16h 05m

Madrid Barajas

Wed 10/22

12:30 pm-3:18 pm

1 stop33h 48m

$444

St. LouisMadrid

STL - MAD

STLMAD

Lambert-St Louis

Wed 11/5

4:41 pm-1:05 pm

1 stop13h 24m

Madrid Barajas

Wed 11/19

11:35 am-8:23 pm

1 stop15h 48m

$445

St. LouisMadrid

STL - MAD

STLMAD

Lambert-St Louis

Mon 10/6

1:30 pm-6:40 am

1 stop10h 10m

Madrid Barajas

Wed 10/22

12:45 pm-10:49 am

2 stops29h 04m

$464

St. LouisMadrid

STL - MAD

STLMAD

Lambert-St Louis

Tue 10/14

6:15 am-6:40 am

2 stops17h 25m

Madrid Barajas

Tue 10/21

6:20 am-3:44 pm

2 stops16h 24m

$466

St. LouisMadrid

STL - MAD

STLMAD

Lambert-St Louis

Wed 10/22

6:30 am-8:20 am

2 stops18h 50m

Madrid Barajas

Fri 10/31

6:00 am-2:55 pm

1 stop14h 55m

$467

St. LouisMadrid

STL - MAD

STLMAD

Lambert-St Louis

Sat 10/11

5:25 pm-9:35 am

1 stop33h 10m

Madrid Barajas

Tue 10/21

6:00 am-5:29 pm

2 stops18h 29m

$476

St. LouisMadrid

STL - MAD

STLMAD

Lambert-St Louis

Wed 12/3

2:48 pm-12:40 pm

2 stops14h 52m

Madrid Barajas

Mon 12/8

11:35 am-7:06 pm

1 stop14h 31m

$486

St. LouisMadrid

STL - MAD

STLMAD

Lambert-St Louis

Wed 11/5

5:15 pm-7:10 pm

2 stops18h 55m

Madrid Barajas

Wed 11/19

6:00 am-11:23 pm

2 stops24h 23m

$488

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/15

Showing 1-10 of 19 results
1
2

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 September 12, 2025.

The best time to book flights from St. Louis to Madrid is 27 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 $543). Flying from St. Louis to Madrid in June is currently the most expensive (average of $1,054). 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 September 17, 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 18% 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 September 17, 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
8,926 reviews

Comfort

7.3

Boarding

7.7

Food

6.6

Crew

8.1

Entertainment

7.1

Overall

7.4

Reviews

1 / 20
10.0
Excellent

Julia,Sep 2025

BUF - DEN

The staff were amazing, from check in to boarding and on the flight. The range of entertainment options were really good as well.
United Airlines
7.4
Good
8,926 reviews
United Airlines
7.4
Good
8,926 reviews

Comfort

7.3

Boarding

7.7

Food

6.6

Crew

8.1

Entertainment

7.1

Overall

7.4

Reviews

1 / 20
10.0
Excellent

Julia,Sep 2025

BUF - DEN

The staff were amazing, from check in to boarding and on the flight. The range of entertainment options were really good as well.
American Airlines
7.2
Good
10,000 reviews
United Airlines
7.4
Good
8,926 reviews

Comfort

7.3

Boarding

7.7

Food

6.6

Crew

8.1

Entertainment

7.1

Overall

7.4

Reviews

1 / 20
10.0
Excellent

Julia,Sep 2025

BUF - DEN

The staff were amazing, from check in to boarding and on the flight. The range of entertainment options were really good as well.
Air Canada
7.1
Good
10,000 reviews
United Airlines
7.4
Good
8,926 reviews

Comfort

7.3

Boarding

7.7

Food

6.6

Crew

8.1

Entertainment

7.1

Overall

7.4

Reviews

1 / 20
10.0
Excellent

Julia,Sep 2025

BUF - DEN

The staff were amazing, from check in to boarding and on the flight. The range of entertainment options were really good as well.
Iberia
7.0
Good
2,925 reviews
United Airlines
7.4
Good
8,926 reviews

Comfort

7.3

Boarding

7.7

Food

6.6

Crew

8.1

Entertainment

7.1

Overall

7.4

Reviews

1 / 20
10.0
Excellent

Julia,Sep 2025

BUF - DEN

The staff were amazing, from check in to boarding and on the flight. The range of entertainment options were really good as well.
British Airways
6.7
Okay
7,367 reviews
United Airlines
7.4
Good
8,926 reviews

Comfort

7.3

Boarding

7.7

Food

6.6

Crew

8.1

Entertainment

7.1

Overall

7.4

Reviews

1 / 20
10.0
Excellent

Julia,Sep 2025

BUF - DEN

The staff were amazing, from check in to boarding and on the flight. The range of entertainment options were really good as well.

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 10h 10m. United Airlines provides one of the quickest options available for as low as $418. 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, British Airways ($546), United Airlines ($578), and Iberia ($586) offers the cheapest pricing from St. Louis to Madrid. You may be able to fly from St. Louis to Madrid for 40% less than the average price by searching for these airlines.

  • What are the cheapest airlines to fly from St. Louis to Madrid one-way?

    The cheapest airlines for a one-way flight from St. Louis to Madrid are Scandinavian Airlines ($376), KLM ($382), and Air Canada ($394).

  • 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 $543). Flying from St. Louis to Madrid in June is currently the most expensive (average of $1,054). 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

Browse thousands of different options on Cheapflights for your next trip

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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.
Kansas City to Madrid flights
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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 September 17, 2025.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest$546Average$760FlexibilityNo cancel feeOn-time70%
United AirlinesCheapest$578Average$944FlexibilityNo cancel feeOn-time69%
IberiaCheapest$586Average$912FlexibilityNo cancel feeOn-time77%
DeltaCheapest$589Average$807FlexibilityNo cancel feeOn-timeN/A
LufthansaCheapest$615Average$757FlexibilityNo cancel feeOn-time76%
American AirlinesCheapest$634Average$1,063FlexibilityNo cancel feeOn-time71%
Air CanadaCheapest$841Average$973FlexibilityNo cancel feeOn-time67%

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