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Cheap flights from St. Louis to Madrid from $391

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 9/18. 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

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Find the cheapest flights from St. Louis to Madrid

Cheap round-trip flights

Enter your travel dates to find the best prices.
British Airways Logo
9:35 pm - 8:05 pm
STL
-
MAD
15h 30m
1 stop
British Airways Logo
12:40 pm - 11:31 pm
MAD
-
STL
17h 51m
1 stop
$720British Airways
Wed, Oct 7 - Wed, Oct 21
British Airways Logo
9:35 pm - 8:05 pm
STL
-
MAD
15h 30m
1 stop
British Airways Logo
1:15 pm - 11:41 pm
MAD
-
STL
16h 26m
1 stop
$728British Airways
Wed, Oct 21 - Fri, Oct 30
British Airways Logo
1:54 pm - 9:35 am
STL
-
MAD
12h 41m
1 stop
British Airways Logo
3:25 pm - 11:41 pm
MAD
-
STL
15h 16m
1 stop
$736British Airways
Mon, Sep 28 - Fri, Oct 9
Air Canada Logo
12:10 pm - 6:50 am
STL
-
MAD
11h 40m
1 stop
Air Canada Logo
12:45 pm - 3:43 pm
MAD
-
STL
33h 58m
2 stops
$742Air Canada
Sun, Sep 20 - Fri, Oct 2
United Airlines Logo
5:30 pm - 8:50 am
STL
-
MAD
32h 20m
2 stops
United Airlines Logo
12:45 pm - 9:24 pm
MAD
-
STL
39h 39m
2 stops
$747United Airlines
Sun, Sep 20 - Fri, Oct 2
Air Canada Logo
2:40 pm - 9:35 am
STL
-
MAD
11h 55m
1 stop
Air Canada Logo
12:45 pm - 3:43 pm
MAD
-
STL
33h 58m
2 stops
$748Air Canada
Wed, Oct 7 - Wed, Oct 21
United Airlines Logo
4:50 pm - 9:00 am
STL
-
MAD
33h 10m
1 stop
United Airlines Logo
1:30 pm - 2:00 pm
MAD
-
STL
31h 30m
1 stop
$750United Airlines
Sun, Sep 20 - Fri, Oct 2
Lufthansa Logo
7:01 pm - 10:30 pm
STL
-
MAD
20h 29m
2 stops
Lufthansa Logo
6:00 am - 1:25 pm
MAD
-
STL
14h 25m
1 stop
$752Lufthansa
Mon, Sep 28 - Fri, Oct 9
United Airlines Logo
12:10 pm - 6:50 am
STL
-
MAD
11h 40m
1 stop
United Airlines Logo
6:00 am - 2:45 pm
MAD
-
STL
14h 45m
1 stop
$753United Airlines
Sun, Oct 18 - Fri, Oct 30
United Airlines Logo
8:25 am - 8:05 am
STL
-
MAD
16h 40m
1 stop
United Airlines Logo
6:00 am - 2:45 pm
MAD
-
STL
14h 45m
1 stop
$754United Airlines
Mon, Oct 19 - Fri, Oct 30

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
MAD12:40 pmMadrid Barajas
17h 51m
1 stop
STL11:31 pmLambert-St Louis
$720
British Airways
Oct 21
STL9:35 pmLambert-St Louis
13h 00m
1 stop
MAD5:35 pmMadrid Barajas
Oct 30
MAD12:00 pmMadrid Barajas
14h 08m
1 stop
STL8:08 pmLambert-St Louis
$728
British Airways
Sep 28
STL1:54 pmLambert-St Louis
12h 41m
1 stop
MAD9:35 amMadrid Barajas
Oct 9
MAD3:25 pmMadrid Barajas
15h 16m
1 stop
STL11:41 pmLambert-St Louis
$736

Lufthansa flights from St. Louis to Madrid

Our best Lufthansa deals on St. Louis to Madrid flight tickets
Lufthansa
Sep 28
STL7:01 pmLambert-St Louis
20h 29m
2 stops
MAD10:30 pmMadrid Barajas
Oct 9
MAD6:00 amMadrid Barajas
14h 25m
1 stop
STL1:25 pmLambert-St Louis
$752
Lufthansa
Sep 19
STL5:30 pmLambert-St Louis
32h 20m
1 stop
MAD8:50 amMadrid Barajas
Oct 2
MAD12:45 pmMadrid Barajas
12h 56m
1 stop
STL6:41 pmLambert-St Louis
$761
Lufthansa
Nov 22
STL5:20 pmLambert-St Louis
32h 55m
1 stop
MAD9:15 amMadrid Barajas
Nov 27
MAD6:00 amMadrid Barajas
14h 45m
1 stop
STL1:45 pmLambert-St Louis
$764

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 4, 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

Wed 10/7

9:35 pm-8:05 pm

1 stop15h 30m

Madrid Barajas

Wed 10/21

12:40 pm-11:31 pm

1 stop17h 51m

$720

St. LouisMadrid

STL - MAD

STLMAD

Lambert-St Louis

Wed 10/21

9:35 pm-8:05 pm

1 stop15h 30m

Madrid Barajas

Fri 10/30

1:15 pm-11:41 pm

1 stop16h 26m

$728

St. LouisMadrid

STL - MAD

STLMAD

Lambert-St Louis

Mon 9/28

1:54 pm-9:35 am

1 stop12h 41m

Madrid Barajas

Fri 10/9

3:25 pm-11:41 pm

1 stop15h 16m

$736

St. LouisMadrid

STL - MAD

STLMAD

Lambert-St Louis

Sun 9/20

12:10 pm-6:50 am

1 stop11h 40m

Madrid Barajas

Fri 10/2

12:45 pm-3:43 pm

2 stops33h 58m

$742

St. LouisMadrid

STL - MAD

STLMAD

Lambert-St Louis

Sun 9/20

5:30 pm-8:50 am

2 stops32h 20m

Madrid Barajas

Fri 10/2

12:45 pm-9:24 pm

2 stops39h 39m

$747

St. LouisMadrid

STL - MAD

STLMAD

Lambert-St Louis

Wed 10/7

2:40 pm-9:35 am

1 stop11h 55m

Madrid Barajas

Wed 10/21

12:45 pm-3:43 pm

2 stops33h 58m

$748

St. LouisMadrid

STL - MAD

STLMAD

Lambert-St Louis

Sun 9/20

4:50 pm-9:00 am

1 stop33h 10m

Madrid Barajas

Fri 10/2

1:30 pm-2:00 pm

1 stop31h 30m

$750

St. LouisMadrid

STL - MAD

STLMAD

Lambert-St Louis

Mon 9/28

7:01 pm-10:30 pm

2 stops20h 29m

Madrid Barajas

Fri 10/9

6:00 am-1:25 pm

1 stop14h 25m

$752
Quickest round-trip

St. LouisMadrid

STL - MAD

STLMAD

Lambert-St Louis

Sun 10/18

12:10 pm-6:50 am

1 stop11h 40m

Madrid Barajas

Fri 10/30

6:00 am-2:45 pm

1 stop14h 45m

$753

St. LouisMadrid

STL - MAD

STLMAD

Lambert-St Louis

Mon 10/19

8:25 am-8:05 am

1 stop16h 40m

Madrid Barajas

Fri 10/30

6:00 am-2:45 pm

1 stop14h 45m

$754

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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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 February is, on average, the cheapest month to fly to Madrid from St. Louis, with most prices found around $636. If you don’t want to visit Madrid in February, then you should wait until December to fly from St. Louis, when ticket prices are also cheap, with an average price of $666.

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 $820 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 $678 on momondo.

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

You could potentially save up to 22% 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?

  • 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
8,036 reviews
Search Lufthansa flights
DeltaPriceFrom $489Free CancellationRating
7.9
8,397 reviews
Search Delta flights
British AirwaysPriceFrom $516Free CancellationRating
6.7
8,026 reviews
Search British Airways flights
IberiaPriceFrom $523Free CancellationRating
7.0
3,222 reviews
Search Iberia flights
United AirlinesPriceFrom $578Free CancellationRating
7.4
9,773 reviews
Search United Airlines flights
American AirlinesPriceFrom $582Free CancellationRating
7.1
11,641 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
Getafe
Cuenca
Fuenlabrada
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
American Airlines
British Airways
Iberia
United Airlines
Delta
Lufthansa