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Cheap flights from St. Louis to Madrid from $325

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 10/11. 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.
Air Canada Logo
12:10 pm - 6:50 amSTL  Lambert-St Louis-MAD Madrid Barajas
11h 40m1 stop Montreal Pierre Elliott Trudeau Intl
Air Canada Logo
1:30 pm - 2:00 pmMAD  Madrid Barajas-STL Lambert-St Louis
31h 30m1 stop Toronto Pearson Intl
$685Air Canada
Sun, Sep 27 - Tue, Oct 13
Air Canada Logo
2:40 pm - 8:50 amSTL  Lambert-St Louis-MAD Madrid Barajas
11h 10m1 stop Toronto Pearson Intl
Air Canada Logo
1:30 pm - 2:00 pmMAD  Madrid Barajas-STL Lambert-St Louis
31h 30m1 stop Toronto Pearson Intl
$688Air Canada
Mon, Sep 21 - Tue, Oct 6
United Airlines Logo
12:10 pm - 6:50 amSTL  Lambert-St Louis-MAD Madrid Barajas
11h 40m1 stop Montreal Pierre Elliott Trudeau Intl
United Airlines Logo
12:45 pm - 3:43 pmMAD  Madrid Barajas-STL Lambert-St Louis
33h 58m2 stops Montreal Pierre Elliott Trudeau Intl Chicago O'Hare Intl
$709United Airlines
Tue, Sep 29 - Fri, Oct 9
United Airlines Logo
12:10 pm - 6:50 amSTL  Lambert-St Louis-MAD Madrid Barajas
11h 40m1 stop Montreal Pierre Elliott Trudeau Intl
United Airlines Logo
12:45 pm - 12:13 pmMAD  Madrid Barajas-STL Lambert-St Louis
30h 28m2 stops Montreal Pierre Elliott Trudeau Intl Chicago O'Hare Intl
$709United Airlines
Sun, Oct 4 - Wed, Oct 14
British Airways Logo
10:21 am - 7:45 amSTL  Lambert-St Louis-MAD Madrid Barajas
14h 24m1 stop Dallas/Fort Worth
British Airways Logo
12:40 pm - 11:58 pmMAD  Madrid Barajas-STL Lambert-St Louis
18h 18m1 stop Charlotte Douglas
$713British Airways
Tue, Nov 24 - Thu, Nov 26
Iberia Logo
9:35 pm - 5:30 pmSTL  Lambert-St Louis-MAD Madrid Barajas
12h 55m1 stop London Heathrow
Iberia Logo
9:00 pm - 6:16 pmMAD  Madrid Barajas-STL Lambert-St Louis
28h 16m2 stops London Heathrow Chicago O'Hare Intl
$713Iberia
Tue, Oct 13 - Mon, Oct 19
Lufthansa Logo
3:30 pm - 12:15 pmSTL  Lambert-St Louis-MAD Madrid Barajas
13h 45m1 stop Frankfurt am Main
Lufthansa Logo
6:00 am - 1:25 pmMAD  Madrid Barajas-STL Lambert-St Louis
14h 25m1 stop Frankfurt am Main
$714Lufthansa
Tue, Sep 29 - Fri, Oct 9
Lufthansa Logo
3:30 pm - 4:00 pmSTL  Lambert-St Louis-MAD Madrid Barajas
17h 30m1 stop Frankfurt am Main
Lufthansa Logo
6:00 am - 1:25 pmMAD  Madrid Barajas-STL Lambert-St Louis
14h 25m1 stop Frankfurt am Main
$714Lufthansa
Mon, Sep 28 - Fri, Oct 9
Iberia Logo
2:54 pm - 12:15 pmSTL  Lambert-St Louis-MAD Madrid Barajas
14h 21m2 stops Boston Logan Intl London Heathrow
Iberia Logo
1:15 pm - 10:44 pmMAD  Madrid Barajas-STL Lambert-St Louis
16h 29m1 stop Philadelphia
$734Iberia
Tue, Dec 15 - Thu, Jan 14
British Airways Logo
1:25 pm - 5:35 amSTL  Lambert-St Louis-MAD Madrid Barajas
33h 10m1 stop Philadelphia
British Airways Logo
12:40 pm - 11:59 pmMAD  Madrid Barajas-STL Lambert-St Louis
18h 19m1 stop Charlotte Douglas
$736British Airways
Sat, Oct 3 - Wed, Oct 21

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Air Canada flights from St. Louis to Madrid

Our best Air Canada deals on St. Louis to Madrid flight tickets
Air Canada
Sep 27
STL12:10 pmLambert-St Louis
11h 40m
1 stop
MAD6:50 amMadrid Barajas
Oct 13
MAD1:30 pmMadrid Barajas
31h 30m
1 stop
STL2:00 pmLambert-St Louis
$685
Air Canada
Sep 21
STL2:40 pmLambert-St Louis
11h 10m
1 stop
MAD8:50 amMadrid Barajas
Oct 6
MAD1:30 pmMadrid Barajas
31h 30m
1 stop
STL2:00 pmLambert-St Louis
$688
Air Canada
Sep 27
STL12:10 pmLambert-St Louis
11h 40m
1 stop
MAD6:50 amMadrid Barajas
Oct 13
MAD6:20 amMadrid Barajas
20h 40m
2 stops
STL8:00 pmLambert-St Louis
$696

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
$709
United Airlines
Sep 29
STL8:00 amLambert-St Louis
15h 50m
2 stops
MAD6:50 amMadrid Barajas
Oct 9
MAD12:45 pmMadrid Barajas
33h 58m
2 stops
STL3:43 pmLambert-St Louis
$714
United Airlines
Oct 7
STL8:00 amLambert-St Louis
17h 05m
2 stops
MAD8:05 amMadrid Barajas
Oct 21
MAD12:45 pmMadrid Barajas
30h 28m
2 stops
STL12:13 pmLambert-St Louis
$715

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 August 9, 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 Lambert-St Louis - MAD Madrid Barajas

STLMAD

Lambert-St Louis

Sun 9/27

12:10 pm-6:50 am

1 stop11h 40m

Madrid Barajas

Tue 10/13

1:30 pm-2:00 pm

1 stop31h 30m

$685

St. LouisMadrid

STL Lambert-St Louis - MAD Madrid Barajas

STLMAD

Lambert-St Louis

Mon 9/21

2:40 pm-8:50 am

1 stop11h 10m

Madrid Barajas

Tue 10/6

1:30 pm-2:00 pm

1 stop31h 30m

$688

St. LouisMadrid

STL Lambert-St Louis - MAD Madrid Barajas

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

$709

St. LouisMadrid

STL Lambert-St Louis - MAD Madrid Barajas

STLMAD

Lambert-St Louis

Sun 10/4

12:10 pm-6:50 am

1 stop11h 40m

Madrid Barajas

Wed 10/14

12:45 pm-12:13 pm

2 stops30h 28m

$709

St. LouisMadrid

STL Lambert-St Louis - MAD Madrid Barajas

STLMAD

Lambert-St Louis

Tue 11/24

10:21 am-7:45 am

1 stop14h 24m

Madrid Barajas

Thu 11/26

12:40 pm-11:58 pm

1 stop18h 18m

$713

St. LouisMadrid

STL Lambert-St Louis - MAD Madrid Barajas

STLMAD

Lambert-St Louis

Tue 10/13

9:35 pm-5:30 pm

1 stop12h 55m

Madrid Barajas

Mon 10/19

9:00 pm-6:16 pm

2 stops28h 16m

$713
Quickest round-trip

St. LouisMadrid

STL Lambert-St Louis - MAD Madrid Barajas

STLMAD

Lambert-St Louis

Tue 9/29

3:30 pm-12:15 pm

1 stop13h 45m

Madrid Barajas

Fri 10/9

6:00 am-1:25 pm

1 stop14h 25m

$714

St. LouisMadrid

STL Lambert-St Louis - MAD Madrid Barajas

STLMAD

Lambert-St Louis

Mon 9/28

3:30 pm-4:00 pm

1 stop17h 30m

Madrid Barajas

Fri 10/9

6:00 am-1:25 pm

1 stop14h 25m

$714

St. LouisMadrid

STL Lambert-St Louis - MAD Madrid Barajas

STLMAD

Lambert-St Louis

Tue 12/15

2:54 pm-12:15 pm

2 stops14h 21m

Madrid Barajas

Thu 1/14

1:15 pm-10:44 pm

1 stop16h 29m

$734

St. LouisMadrid

STL Lambert-St Louis - MAD Madrid Barajas

STLMAD

Lambert-St Louis

Sat 10/3

1:25 pm-5:35 am

1 stop33h 10m

Madrid Barajas

Wed 10/21

12:40 pm-11:59 pm

1 stop18h 19m

$736

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?

Prices are currently low for flights on this route.

Typical prices usually range from $747 to $1,040.
The lowest price recently found on this route was $685.

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 $673. If you don’t want to visit Madrid in February, then you should wait until April to fly from St. Louis, when ticket prices are also cheap, with an average price of $735.

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 $934 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 4% 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 August 2026, prices for St. Louis to Madrid flights are approximately 17% 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
8,176 reviews
Search Lufthansa flights
DeltaPriceFrom $489Free CancellationRating
7.8
8,496 reviews
Search Delta flights
British AirwaysPriceFrom $516Free CancellationRating
6.7
8,151 reviews
Search British Airways flights
IberiaPriceFrom $523Free CancellationRating
7.0
3,263 reviews
Search Iberia flights
American AirlinesPriceFrom $581Free CancellationRating
7.1
11,895 reviews
Search American Airlines flights
United AirlinesPriceFrom $586Free CancellationRating
7.4
10,088 reviews
Search United Airlines flights

Traveling to a place near Madrid?

Book flights to Madrid if you plan to visit one of these locations
Toledo
Segovia
Getafe
Fuenlabrada
Cuenca
Guadalajara
San Lorenzo de El Escorial

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