Latest deals
Insights
When to book
FAQs
Reviews
Price Alerts

Cheap flights from St. Louis to Madrid from $345

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 1/8. 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
0 bags

Discover deals from 900+ travel sites with momondo.

Save money when you book flights with momondo

Big names and deals

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

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
1:57 pm - 9:15 amSTL-MAD
12h 18m1 stop
Virgin Atlantic Logo
11:15 am - 7:04 pmMAD-STL
14h 49m1 stop
$426Virgin Atlantic
Find Deal
Mon, Dec 8 - Wed, Dec 24
Delta Logo
9:30 am - 9:15 amSTL-MAD
16h 45m1 stop
Delta Logo
11:15 am - 11:38 pmMAD-STL
19h 23m1 stop
$429Delta
Find Deal
Mon, Dec 8 - Wed, Dec 24
KLM Logo
9:30 am - 9:15 amSTL-MAD
16h 45m1 stop
KLM Logo
11:15 am - 11:38 pmMAD-STL
19h 23m1 stop
$438KLM
Find Deal
Mon, Dec 8 - Wed, Dec 24
Delta Logo
11:40 am - 9:15 amSTL-MAD
14h 35m1 stop
Delta Logo
6:00 am - 5:00 pmMAD-STL
18h 00m2 stops
$462Delta
Find Deal
Mon, Dec 8 - Wed, Dec 24
Multiple Airlines Logo
7:00 am - 9:15 amSTL-MAD
19h 15m1 stop
Multiple Airlines Logo
1:35 pm - 5:03 pmMAD-STL
34h 28m2 stops
$465Multiple Airlines
Find Deal
Wed, Dec 3 - Fri, Dec 12
Delta Logo
6:00 am - 9:15 amSTL-MAD
20h 15m1 stop
Delta Logo
12:35 pm - 9:50 amMAD-STL
28h 15m2 stops
$467Delta
Find Deal
Tue, Dec 9 - Tue, Dec 16
United Airlines Logo
11:25 am - 9:15 amSTL-MAD
14h 50m2 stops
United Airlines Logo
1:35 pm - 2:25 pmMAD-STL
31h 50m2 stops
$470United Airlines
Find Deal
Wed, Dec 3 - Fri, Dec 12
Air Canada Logo
4:05 pm - 8:00 amSTL-MAD
32h 55m2 stops
Air Canada Logo
1:35 pm - 2:26 pmMAD-STL
31h 51m2 stops
$472Air Canada
Find Deal
Mon, Dec 8 - Wed, Dec 24
Multiple Airlines Logo
7:00 am - 9:15 amSTL-MAD
19h 15m1 stop
Multiple Airlines Logo
6:00 am - 1:55 pmMAD-STL
14h 55m1 stop
$477Multiple Airlines
Find Deal
Wed, Dec 3 - Fri, Dec 12
Multiple Airlines Logo
6:42 pm - 9:15 amSTL-MAD
31h 33m2 stops
Multiple Airlines Logo
5:55 am - 1:55 pmMAD-STL
15h 00m1 stop
$478Multiple Airlines
Find Deal
Mon, Dec 8 - Wed, Dec 24

Lufthansa flights from St. Louis to Madrid

Our best Lufthansa deals on St. Louis to Madrid flight tickets
Lufthansa
Nov 23
STL1:10 pmLambert-St Louis
21h 40m
2 stops
MAD5:50 pmMadrid Barajas
Dec 2
MAD6:35 pmMadrid Barajas
26h 20m
2 stops
STL1:55 pmLambert-St Louis
$507
Find similar
Lufthansa
Nov 23
STL6:43 pmLambert-St Louis
22h 07m
2 stops
MAD11:50 pmMadrid Barajas
Dec 2
MAD6:35 pmMadrid Barajas
26h 20m
2 stops
STL1:55 pmLambert-St Louis
$519
Find similar
Lufthansa
Nov 23
STL6:43 pmLambert-St Louis
22h 07m
2 stops
MAD11:50 pmMadrid Barajas
Dec 2
MAD5:05 pmMadrid Barajas
27h 50m
1 stop
STL1:55 pmLambert-St Louis
$520
Find similar

Delta flights from St. Louis to Madrid

Our best Delta deals on St. Louis to Madrid flight tickets
Delta
Dec 8
STL9:30 amLambert-St Louis
16h 45m
1 stop
MAD9:15 amMadrid Barajas
Dec 24
MAD11:15 amMadrid Barajas
19h 23m
1 stop
STL11:38 pmLambert-St Louis
$429
Find similar
Delta
Dec 8
STL6:05 pmLambert-St Louis
18h 05m
2 stops
MAD7:10 pmMadrid Barajas
Dec 24
MAD11:15 amMadrid Barajas
14h 49m
1 stop
STL7:04 pmLambert-St Louis
$457
Find similar
Delta
Dec 8
STL11:40 amLambert-St Louis
14h 35m
1 stop
MAD9:15 amMadrid Barajas
Dec 24
MAD6:00 amMadrid Barajas
18h 00m
2 stops
STL5:00 pmLambert-St Louis
$462
Find similar

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 November 13, 2025.
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

St. LouisMadrid

STL - MAD

STLMAD

Lambert-St Louis

Mon 12/8

1:57 pm-9:15 am

1 stop12h 18m

Madrid Barajas

Wed 12/24

11:15 am-7:04 pm

1 stop14h 49m

$426

St. LouisMadrid

STL - MAD

STLMAD

Lambert-St Louis

Mon 12/8

9:30 am-9:15 am

1 stop16h 45m

Madrid Barajas

Wed 12/24

11:15 am-11:38 pm

1 stop19h 23m

$429

St. LouisMadrid

STL - MAD

STLMAD

Lambert-St Louis

Mon 12/8

9:30 am-9:15 am

1 stop16h 45m

Madrid Barajas

Wed 12/24

11:15 am-11:38 pm

1 stop19h 23m

$438

St. LouisMadrid

STL - MAD

STLMAD

Lambert-St Louis

Mon 12/8

11:40 am-9:15 am

1 stop14h 35m

Madrid Barajas

Wed 12/24

6:00 am-5:00 pm

2 stops18h 00m

$462

St. LouisMadrid

STL - MAD

STLMAD

Lambert-St Louis

Wed 12/3

7:00 am-9:15 am

1 stop19h 15m

Madrid Barajas

Fri 12/12

1:35 pm-5:03 pm

2 stops34h 28m

$465

St. LouisMadrid

STL - MAD

STLMAD

Lambert-St Louis

Tue 12/9

6:00 am-9:15 am

1 stop20h 15m

Madrid Barajas

Tue 12/16

12:35 pm-9:50 am

2 stops28h 15m

$467

St. LouisMadrid

STL - MAD

STLMAD

Lambert-St Louis

Wed 12/3

11:25 am-9:15 am

2 stops14h 50m

Madrid Barajas

Fri 12/12

1:35 pm-2:25 pm

2 stops31h 50m

$470

St. LouisMadrid

STL - MAD

STLMAD

Lambert-St Louis

Mon 12/8

4:05 pm-8:00 am

2 stops32h 55m

Madrid Barajas

Wed 12/24

1:35 pm-2:26 pm

2 stops31h 51m

$472

St. LouisMadrid

STL - MAD

STLMAD

Lambert-St Louis

Wed 12/3

7:00 am-9:15 am

1 stop19h 15m

Madrid Barajas

Fri 12/12

6:00 am-1:55 pm

1 stop14h 55m

$477

St. LouisMadrid

STL - MAD

STLMAD

Lambert-St Louis

Mon 12/8

6:42 pm-9:15 am

2 stops31h 33m

Madrid Barajas

Wed 12/24

5:55 am-1:55 pm

1 stop15h 00m

$478

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 cheapest month to fly to Madrid?

The month of November is, on average, the cheapest month to fly to Madrid from St. Louis, with most prices found around $617. If you don’t want to visit Madrid in November, then you should wait until February to fly from St. Louis, when ticket prices are also cheap, with an average price of $731.

What is the cheapest day to depart on your flight to Madrid?

The cheapest day to depart on your flight to Madrid is on a Tuesday when prices can be found for as low as $743. This is often the case because there is less demand to fly during this day of the week. Be sure to avoid booking your departure on a Monday as prices are generally higher than usual. According to our data, the average ticket price to Madrid on Monday is $1,028.

What is the cheapest time of day to depart on your flight to Madrid?

Flying to Madrid from St. Louis at noon is the least expensive time of day to depart. momondo users have found prices as low as $809 when looking at flights departing at noon. Flights to Madrid are more costly in the morning, with an average ticket price of $983. Departure times in the morning fall within the peak daily travel times, which is why tickets can be more expensive.

How far in advance should I book a flight 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 $909 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 $609 on momondo.

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

You could potentially save up to 10% 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 November 2025, prices for St. Louis to Madrid flights are approximately 27% 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

Direct flights

None
There are no direct flights from St. Louis to Madrid. There are no popular flight routes from St. Louis to Madrid.
Search flight deals

  • 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. 12h 07m 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 $524Free CancellationRating
6.8
7,572 reviews
Search Lufthansa flights
British AirwaysPriceFrom $546Free CancellationRating
6.7
7,520 reviews
Search British Airways flights
United AirlinesPriceFrom $578Free CancellationRating
7.4
9,017 reviews
Search United Airlines flights
IberiaPriceFrom $586Free CancellationRating
7.0
3,012 reviews
Search Iberia flights
DeltaPriceFrom $589Free CancellationRating
7.9
8,007 reviews
Search Delta flights
American AirlinesPriceFrom $636Free CancellationRating
7.2
11,051 reviews
Search American Airlines flights
Air CanadaPriceFrom $701Free CancellationRating
7.1
10,448 reviews
Search Air Canada flights

Traveling to a place near Madrid?

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

An easier way to manage your Madrid trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Sat 12/13
Sat 12/20
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to Spain

Fly your favorite airline to Madrid

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