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Cheap flights from St. Louis to Madrid from $307

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 8/2. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from St. Louis to Madrid

Cheap round-trip flights

Enter your travel dates to find the best prices.
Virgin Atlantic Logo
11:00 am - 12:15 pm
STL
-
MAD
18h 15m
1 stop
Virgin Atlantic Logo
9:50 am - 11:42 pm
MAD
-
STL
20h 52m
1 stop
$442Virgin Atlantic
Mon, Sep 7 - Tue, Sep 15
Virgin Atlantic Logo
5:23 pm - 12:15 pm
STL
-
MAD
11h 52m
1 stop
Virgin Atlantic Logo
12:45 pm - 11:16 pm
MAD
-
STL
17h 31m
2 stops
$445Virgin Atlantic
Mon, Sep 7 - Fri, Sep 18
Virgin Atlantic Logo
5:23 pm - 12:15 pm
STL
-
MAD
11h 52m
1 stop
Virgin Atlantic Logo
12:45 pm - 11:42 pm
MAD
-
STL
17h 57m
2 stops
$640Virgin Atlantic
Mon, Sep 7 - Tue, Sep 15
Virgin Atlantic Logo
6:30 am - 9:55 am
STL
-
MAD
20h 25m
2 stops
Virgin Atlantic Logo
12:45 pm - 11:16 pm
MAD
-
STL
17h 31m
2 stops
$662Virgin Atlantic
Mon, Sep 7 - Fri, Sep 18
Multiple Airlines Logo
8:55 am - 9:35 am
STL
-
MAD
17h 40m
1 stop
Multiple Airlines Logo
1:30 pm - 2:00 pm
MAD
-
STL
31h 30m
1 stop
$700Multiple Airlines
Wed, Sep 30 - Tue, Oct 6
Multiple Airlines Logo
8:55 am - 9:35 am
STL
-
MAD
17h 40m
1 stop
Multiple Airlines Logo
5:55 am - 1:25 pm
MAD
-
STL
14h 30m
1 stop
$709Multiple Airlines
Wed, Sep 30 - Tue, Oct 6
United Airlines Logo
12:10 pm - 6:50 am
STL
-
MAD
11h 40m
1 stop
United Airlines Logo
12:45 pm - 3:43 pm
MAD
-
STL
33h 58m
2 stops
$714United Airlines
Tue, Sep 29 - Fri, Oct 9
United Airlines Logo
7:30 am - 9:00 am
STL
-
MAD
18h 30m
1 stop
United Airlines Logo
12:45 pm - 3:43 pm
MAD
-
STL
33h 58m
2 stops
$715United Airlines
Wed, Oct 7 - Wed, Oct 21
United Airlines Logo
7:30 am - 9:00 am
STL
-
MAD
18h 30m
1 stop
United Airlines Logo
12:45 pm - 3:43 pm
MAD
-
STL
33h 58m
2 stops
$716United Airlines
Wed, Oct 7 - Wed, Oct 21
Multiple Airlines Logo
8:55 am - 9:35 am
STL
-
MAD
17h 40m
1 stop
Multiple Airlines Logo
6:20 am - 8:00 pm
MAD
-
STL
20h 40m
2 stops
$718Multiple Airlines
Wed, Sep 30 - Tue, Oct 6

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United Airlines flights from St. Louis to Madrid

Our best United Airlines deals on St. Louis to Madrid flight tickets
United Airlines
Sep 29
STL12:10 pmLambert-St Louis
11h 40m
1 stop
MAD6:50 amMadrid Barajas
Oct 9
MAD12:45 pmMadrid Barajas
33h 58m
2 stops
STL3:43 pmLambert-St Louis
$714
United Airlines
Oct 7
STL7:30 amLambert-St Louis
18h 30m
1 stop
MAD9:00 amMadrid Barajas
Oct 21
MAD12:45 pmMadrid Barajas
33h 58m
2 stops
STL3:43 pmLambert-St Louis
$715
United Airlines
Oct 7
STL7:30 amLambert-St Louis
18h 30m
1 stop
MAD9:00 amMadrid Barajas
Oct 21
MAD12:45 pmMadrid Barajas
33h 58m
2 stops
STL3:43 pmLambert-St Louis
$716

Air Canada flights from St. Louis to Madrid

Our best Air Canada deals on St. Louis to Madrid flight tickets
Air Canada
Sep 29
STL8:55 amLambert-St Louis
14h 55m
2 stops
MAD6:50 amMadrid Barajas
Oct 9
MAD12:45 pmMadrid Barajas
33h 58m
2 stops
STL3:43 pmLambert-St Louis
$722
Air Canada
Sep 28
STL9:04 amLambert-St Louis
16h 46m
2 stops
MAD8:50 amMadrid Barajas
Oct 9
MAD12:45 pmMadrid Barajas
33h 58m
2 stops
STL3:43 pmLambert-St Louis
$723
Air Canada
Sep 30
STL9:04 amLambert-St Louis
17h 31m
2 stops
MAD9:35 amMadrid Barajas
Oct 6
MAD1:30 pmMadrid Barajas
29h 43m
2 stops
STL12:13 pmLambert-St Louis
$728

momondo 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, momondo users made 832,500 searches. Data last updated June 24, 2026.
Use the filters below to find and compare flights from St. Louis to Madrid that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

St. LouisMadrid

STL - MAD

STLMAD

Lambert-St Louis

Mon 9/7

11:00 am-12:15 pm

1 stop18h 15m

Madrid Barajas

Tue 9/15

9:50 am-11:42 pm

1 stop20h 52m

$442
Quickest round-trip

St. LouisMadrid

STL - MAD

STLMAD

Lambert-St Louis

Mon 9/7

5:23 pm-12:15 pm

1 stop11h 52m

Madrid Barajas

Fri 9/18

12:45 pm-11:16 pm

2 stops17h 31m

$445

St. LouisMadrid

STL - MAD

STLMAD

Lambert-St Louis

Mon 9/7

5:23 pm-12:15 pm

1 stop11h 52m

Madrid Barajas

Tue 9/15

12:45 pm-11:42 pm

2 stops17h 57m

$640

St. LouisMadrid

STL - MAD

STLMAD

Lambert-St Louis

Mon 9/7

6:30 am-9:55 am

2 stops20h 25m

Madrid Barajas

Fri 9/18

12:45 pm-11:16 pm

2 stops17h 31m

$662

St. LouisMadrid

STL - MAD

STLMAD

Lambert-St Louis

Wed 9/30

8:55 am-9:35 am

1 stop17h 40m

Madrid Barajas

Tue 10/6

1:30 pm-2:00 pm

1 stop31h 30m

$700

St. LouisMadrid

STL - MAD

STLMAD

Lambert-St Louis

Wed 9/30

8:55 am-9:35 am

1 stop17h 40m

Madrid Barajas

Tue 10/6

5:55 am-1:25 pm

1 stop14h 30m

$709

St. LouisMadrid

STL - MAD

STLMAD

Lambert-St Louis

Tue 9/29

12:10 pm-6:50 am

1 stop11h 40m

Madrid Barajas

Fri 10/9

12:45 pm-3:43 pm

2 stops33h 58m

$714

St. LouisMadrid

STL - MAD

STLMAD

Lambert-St Louis

Wed 10/7

7:30 am-9:00 am

1 stop18h 30m

Madrid Barajas

Wed 10/21

12:45 pm-3:43 pm

2 stops33h 58m

$715

St. LouisMadrid

STL - MAD

STLMAD

Lambert-St Louis

Wed 10/7

7:30 am-9:00 am

1 stop18h 30m

Madrid Barajas

Wed 10/21

12:45 pm-3:43 pm

2 stops33h 58m

$716

St. LouisMadrid

STL - MAD

STLMAD

Lambert-St Louis

Wed 9/30

8:55 am-9:35 am

1 stop17h 40m

Madrid Barajas

Tue 10/6

6:20 am-8:00 pm

2 stops20h 40m

$718

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

See travel insights to Madrid from

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

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 December is, on average, the cheapest month to fly to Madrid from St. Louis, with most prices found around $666. If you don’t want to visit Madrid in December, then you should wait until February to fly from St. Louis, when ticket prices are also cheap, with an average price of $669.

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 $868 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 $659 on momondo.

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

You could potentially save up to 29% 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 June 2026, prices for St. Louis to Madrid flights are approximately 13% 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

Fastest flight time

11h 40m

Direct flights

None
The fastest flight from St. Louis to Madrid takes 11h 40m
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 40m 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?

  • 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?

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
LufthansaPriceFrom $482Free CancellationRating
6.8
8,091 reviews
Search Lufthansa flights
DeltaPriceFrom $489Free CancellationRating
7.8
8,432 reviews
Search Delta flights
British AirwaysPriceFrom $516Free CancellationRating
6.7
8,068 reviews
Search British Airways flights
IberiaPriceFrom $523Free CancellationRating
7.0
3,246 reviews
Search Iberia flights
United AirlinesPriceFrom $578Free CancellationRating
7.4
9,881 reviews
Search United Airlines flights
American AirlinesPriceFrom $581Free CancellationRating
7.1
11,751 reviews
Search American Airlines flights

Traveling to a place near Madrid?

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

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Fly your favorite airline to Madrid

Airlines are sorted and displayed according to clicks in the past 7 days on momondo
British Airways
American Airlines
Iberia
United Airlines
Delta
Lufthansa