STL - MAD

$433 Find Cheap Flights from St. Louis to Madrid - Compare and Save

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from St. Louis to Madrid departing on 8/23. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

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Everything you should know

Cheapest round-trip
$709
Typical prices: $623-$757
United Airlines
Sun 10/4Wed 10/14
STL - MAD • 1 stop
Cheapest one-way
$433
Typical prices: $467-$598
Multiple Airlines
Sun 8/23
STL - MAD • 3 stops
Top airlines
Cheapest • from $709 (round-trip)
Best reviews • 7.8 score
Airline reviews
Airline reviews
+1
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Airline reviews
Airline reviews
+1
Nonstop flights
Not available
There are currently no direct flights between St. Louis and Madrid. You'll need at least 1 connection.
Insights
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Insights
Top layover airports
Cheapest • Avg $602 (round-trip)
Shortest trip • 11h 10m (one-way)
Insights
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Insights
When to book
in advance
Our data shows that travelers who book at least 2 weeks in advance save around 31% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
Cheapest • 23% price drop
Most popular
Good to know
Good to know
+1
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Good to know
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Flight Deals
Booking Insights
Flight Deals

Cheap Flights from St. Louis to Madrid (STL-MAD)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from St. Louis to Madrid that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from St. Louis to Madrid

Sun, Oct 4 - Wed, Oct 14
United Airlines Logo
12:10 pm - 6:50 am
STL
-
MAD
11h 40m
1 stop
United Airlines Logo
12:45 pm - 12:13 pm
MAD
-
STL
30h 28m
2 stops
$709United 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
$710United Airlines
Sun, Oct 4 - Wed, Oct 14
United Airlines Logo
8:00 am - 6:50 am
STL
-
MAD
15h 50m
2 stops
United Airlines Logo
12:45 pm - 3:43 pm
MAD
-
STL
33h 58m
2 stops
$713United Airlines
Sun, Oct 18 - Wed, Oct 21
United Airlines Logo
12:10 pm - 6:50 am
STL
-
MAD
11h 40m
1 stop
United Airlines Logo
12:45 pm - 12:13 pm
MAD
-
STL
30h 28m
2 stops
$714United Airlines
Mon, Sep 28 - Fri, Oct 9
United Airlines Logo
7:30 am - 9:00 am
STL
-
MAD
18h 30m
1 stop
United Airlines Logo
1:30 pm - 12:15 pm
MAD
-
STL
29h 45m
2 stops
$715United Airlines
Mon, Sep 28 - Fri, Oct 9
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
$716United Airlines
Wed, Oct 21 - Fri, Oct 30
British Airways Logo
9:35 pm - 8:05 pm
STL
-
MAD
15h 30m
1 stop
British Airways Logo
1:00 pm - 9:08 pm
MAD
-
STL
14h 08m
1 stop
$717British Airways
Sun, Jan 3 - Tue, Jan 12
United Airlines Logo
8:05 am - 8:00 am
STL
-
MAD
16h 55m
2 stops
United Airlines Logo
1:25 pm - 11:09 am
MAD
-
STL
28h 44m
2 stops
$718United Airlines
Sun, Oct 4 - Wed, Oct 14
Multiple Airlines Logo
12:10 pm - 6:50 am
STL
-
MAD
11h 40m
1 stop
Multiple Airlines Logo
5:55 am - 1:25 pm
MAD
-
STL
14h 30m
1 stop
$719Multiple Airlines
Wed, Oct 21 - Fri, Oct 30
United Airlines Logo
12:20 pm - 9:00 am
STL
-
MAD
13h 40m
1 stop
United Airlines Logo
6:00 am - 2:45 pm
MAD
-
STL
14h 45m
1 stop
$720United Airlines
Booking Insights

KAYAK's insights & trends for St. Louis to Madrid flights

Get data-powered insights and trends into flights from St. Louis to Madrid to help you find the cheapest flights, the best time to fly and much more.

How much is a round-trip flight from St. Louis to Madrid?

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from St. Louis to Madrid departing in October.

What is the cheapest month to fly from St. Louis to Madrid?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from St. Louis to Madrid, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from St. Louis to Madrid is February, where tickets cost $673 (return) on average. On the other hand, the most expensive months are June and July, where the average cost of round-trip tickets is $1,465 and $1,156 respectively.

How far in advance should I book a flight from St. Louis to Madrid?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from St. Louis to Madrid, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from St. Louis to Madrid, you should book around 2 weeks before departure, which saves you about 31% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 11 weeks before departure.

Good to know

Low season

November

Cheapest flight

$433
Best time to beat the crowds with an average 9% drop in price.
Most popular time to fly and prices are also 17% lower on average.
Flight from St. Louis to Madrid

When to book flights from St. Louis to Madrid

Are your dates flexible? Find out the best times to travel from St. Louis to Madrid based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from St. Louis to Madrid

  • What is the cheapest flight from St. Louis to Madrid?

    In the last 5 days, the lowest price for a flight from St. Louis to Madrid was $433 for a one-way ticket and $704 for a round-trip.

  • Do I need a passport to fly between St. Louis and Madrid?

    A passport is required to fly from St. Louis to Madrid.

  • Which airports will I be using when flying from St. Louis to Madrid?

    When flying out of St. Louis you will be using Lambert-St Louis. You will be landing at Madrid, also known as Madrid Barajas.

  • Which aircraft models fly most regularly from St. Louis to Madrid?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from St. Louis to Madrid?

    SkyTeam, Star Alliance, and oneworld are the airline alliances operating flights between St. Louis and Madrid, with SkyTeam being the most commonly used for this route.

  • Which is the best airline for flights from St. Louis to Madrid, Delta or United Airlines?

    The two airlines most popular with KAYAK users for flights from St. Louis to Madrid are Delta and United Airlines. With an average price for the route of $788 and an overall rating of 7.8, Delta is the most popular choice. United Airlines is also a great choice for the route, with an average price of $1,146 and an overall rating of 7.4.

  • How does KAYAK find such low prices on flights from St. Louis to Madrid?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from St. Louis to Madrid.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from St. Louis to Madrid?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Madrid from St. Louis is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from St. Louis to Madrid?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Madrid with an airline and back to St. Louis with another airline. Booking your flights between St. Louis and MAD can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from St. Louis to Madrid?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Madrid from St. Louis up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top 5 airlines serving from St. Louis to Madrid

 
See real verified KAYAK customer reviews for airlines flying from St. Louis to Madrid. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from St. Louis to Madrid? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.8
DeltaOverall score based on 8476 reviews
7.8Entertainment
8.5Crew
7.8Comfort
8.1Boarding
7.2Food
Airline reviews

Our flight was delayed by over 4 hours due to a maintenance issue. They announced a new plane was on the way. We were given a $12 food voucher ( airport food is quite expensive You can’t even by a water and a small snack for 12:00. 4 hours later we boarded and landed in Atlanta at 10:20 ish pm. Of course we missed our connection and we were given a hotel voucher and another food voucher ! We didn’t make it home until 11:00 the next day ! Unacceptable

2.0 MediocreAnonymous, Jul 2026
MCI - ATL
Read more Delta reviews

Our flight was delayed by over 4 hours due to a maintenance issue. They announced a new plane was on the way. We were given a $12 food voucher ( airport food is quite expensive You can’t even by a water and a small snack for 12:00. 4 hours later we boarded and landed in Atlanta at 10:20 ish pm. Of course we missed our connection and we were given a hotel voucher and another food voucher ! We didn’t make it home until 11:00 the next day ! Unacceptable

From checking to boarding, it was a seamless experience. The service agents were so helpful. The flight crew was so pleasant.

Delta has too many delays now days. It is 1:06 am now. I was supposed to land in Norfolk at 10:30 pm. I got re-booked through Detroit and I’m still in Detroit. I hope to be landed in Norfolk by 3am. I’ve been in airports for 12 hours as of right now. There is a weather delay now but most delays lately have been maintenance.

Great flight with Delta! Boarding was quick and easy, the amenities were solid, and the plane was in great shape. The flight attendants had a fun, lively energy while staying professional. All in all, a smooth trip — even managed to catch up on some rest. Thanks, Delta!

I'm a tall guy and even the seats with more leg room were not as comfortable as I had hoped.

My flight was canceled after being rescheduled for four days canceling my trip. Kayak and everyone affiliated with it I.e the airlines, and just fly have been excruciating to deal with. My trip to visit family had to be canceled as there was no way to make it. I am furious at all of you.

They delayed our flight because of bad weather in NY which was completely understandable. Then they cancelled our flight and a later flight that evening. The earliest we could fly was the next morning. We ended up buying last minute tickets on another airline and made it home slightly delayed but safely that evening. Delta kept saying it was weather related but if that was the case how did we make it back on another airline? The weather in NY was cloudy but not bad.

Overall, aside from the baggage issue, it was as good as one expects.

The plane smelled like a sewer. Multiple passengers complained. It’s a safety and quality issue to clean these planes.

We were delayed 2 hours leaving STL. I had 20 mins from when we landed in SLC terminal A to make it to SLC terminal B. I had to actually run! thankfully I made my flight but 3/4 legs were delayed to some capacity.

Our flight was great with an unexpected upgrade. However, four days into our travel we are still without a piece of luggage. The bag tracker has not been accurate, the airline is not communicating with me or the luggage delivery service and no one is willing to take responsibility or guarantee any kind of support or reimbursement. Unfortunately, we do not have the option to easily shop to replace items as we are currently on a cruise. I have been very disappointed by United Airlines response.

Fine not above and beyond as I had a connection that was delayed due to maintenance

HORRIBLE, my initial flight was cancelled, they made me pay $200 extra dollars and that got cancelled as well! After 6 cancellations I decided to get a refund because I needed to get home to my babies. Out of $1000+ dollars they offered me only $40 in refund! Totally unacceptable! The flight that they cancelled I was able to fly it on another airline. I had to spend $400 on one way tickets just to get home! I’m still getting the runaround.

Flight was delayed. De-icing took a while. When we landed had to wait for another plane to vacate our gate. Just an overall bad experience.

Flight was delayed only slightly before takeoff due to traffic control. However, the flight arrived early to ORD. Good flight. United has been very reliable for me.

Our flight was understandably diverted to a small regional airport in Laramie, Wyoming due to weather conditions, which I fully recognize and appreciate. However, the low rating stems from the experience that followed: passengers remained on board for over an hour without the option to deplane and stretch, despite the aircraft being stationary. Although the pilot opened the cabin door, only he was permitted to exit. Meanwhile, passengers grew increasingly uncomfortable as warm summer air entered the cabin through the open door, and being in the second row meant we were impacted immediately. While the flight attendants made efforts to keep everyone at ease, I believe allowing passengers to deplane briefly, given the extended delay, would have significantly improved the overall experience.

Overall a very poor experience - booked premium economy tickets but due to last minute flight delays , all my itinery went for a toss and had to fly economy class with no access to lounge or any compensation by united airlines to make up for the flight delays . i had expected better experience than that from united.

I flew Delta last week and United Airlines is a poor substitute mechanical problems with the plane and shitty food among other things made my travel experience what’s become to be expected from United no way is it ever worth the money they make us pay

Onboarding - it would be great to see on the screen what group they were boarding. It was very confusing on who was boarding (even though they called it out) they were not clear and the space to board was strange.

Older plane. Food was really bad, almost not worth the effort. Huge difference with European based airlines.

Terrible check in experience in Miami airport by a so-called supervisor. Food came and they were picking up trash within 5 mins. Did not get fed again for about 6 hours. No chance to buy anything on board, horrible experience. Flight attendants have no control over passengers dropping off bags closer to the exit, not close to their seat.

The food was okay and the space in business class was smaller than we had to Singapore.

Our particular exceptional experience was with Johnny at JFK at check in. He was the kindest, most accommodating agent I’ve ever encountered taking extra steps to help my husband and I with our extra baggage. I hope that he knows how much he positively affected our trip.

Because I bought my ticket from Underpricer, I could not check in online. I could only check in at the airport and that was deeply frustrating because I had to arrive very early. The flight also departed 45 min late and passengers were given no explanations about why we were delayed. I was worried I would miss my connecting flight. Once on board, however, the flight was fine.

I’m sure Business Class would be excellent. I feel like I got what I paid for. Overall it was good and well worth it. I would do it again.

Boarding: Boarding was a bit of a mess. Our tickets indicated "BC" for Business Class, but we and many others were confused as that was not indicated anywhere in the airport, so we didn't know when we're supposed to board. The airplane: The airplane was nice. However, we sat near the back of the business class cabin and the flight attendants and passengers from other cabins would constantly move the curtain (which was very loud), preventing me from fallling asleep on my 8 hour flight. The flight crew: Amazing, generally. However, they nearly forgot to serve breakfast to me. The flight food: I was able to select my meal for dinner, which was really good. Breakfast was a bit of a mess, however. The crew forgot to serve me breakfast until the last minute. Very little was available by the time they remembered. The entertainment: Paltry, underwhelming, and dated. Not one new movie was available. Bottom line: For the money, you might want to consider other options for your international business class flights.

We arrived 4 hours early and still almost missed the flight because they weren’t able to access one of the boarding tickets. They then sent hour bags late and we were all of our without clothing and eventually had to take an expensive cab back and forth to the airport as they wouldn’t deliver the bag which arrived late at night that day and we would have to wait until noon the began day (messing up a second day of plans). Also, all the food has dairy or pork. No vegan or even vegetarian option in the flight—even for purchase.

The flight delay in Dallas created a domino effect that impacted all of the connecting flights. It also increased the number of connections. I missed my flight from Casablanca to Marrakech because of the tight turnaround when landing in Casablanca. . CMN airport was understaffed. Only one person could help while other employees were just watching him. It was an extremely frustrating situation. People were crying and slamming their palms on the counter when speaking to the customer service provider, Allabough (man’s name?). Allabough couldn’t change my flight in the system. simultaneously, I was on the call with America. Airlines customer service rep named Solomon that said he couldn’t change it either. So, I took a ONYA voyages train to from Casablanca to Marrakech to get there on Friday June 26. This was unpredictable trip.

No entertainment yatem in flight at seat 51H. Would not shut down either leaving a self moving and openin and changing menus with changes in colors,images brightness levels sort of the type when you get sleep deprivation and image overload when being tortured during an interrogation. 8 hours worth of it. Unable to place backpack underneath seat on that chair. One female stewardess was excellent as she gave up her carryon's space for my backpack but the rest of the iberia crew were very sharp an chtting during the whole flight. The plane did not have hot water so nobody had coffee nor tea. The plane was not up to par to be flying.

Everyone was nice. It was on time and the food was. Airplane food, but not horrible

Not bad but they lost 2 of my bags when I got to Florence

Couldn’t get boarding passes online, delayed an hour, and smallest amount of space on board I’ve ever encountered for such a long flight.

In general, I've had excellent experiences with Iberia flights and will continue to use them. In this last flight there were two things that didn't go right. I didn't get the kosher meal I had pre-requested when I had checked in on-line. Things worked out OK as we ended up eating the fish and vegetarian choices, which were really good. The other issue was that some movies for me and my wife started fine but after 8-12 minutes the content just switched to something else. The flight attendant reset our entertainment systems, but the problem persisted. We ended up choosing other movies/TV shows that did work fine.

Awful. They didn't even show concern that her connecting flight( Dallas to Mardrid) was gone/missing. I don't understand how that is even possible. Rudest answer from one of the crew was that American Airlines sold the tickets to somebody else. My daughter was not in the list.

Really like the idea experience on this airline I will use again

the seats were so cramped you could barely move. it was difficult to eat when passengers would recline their seats. the seats were so flimsy and unstable that whenever someone got in and out of their seat, it bounced like a spring back in your face. the movies were nice. the food was terrible. even though the conditions were terrible, they tried to pressure passengers to relocate their seats to accommodate adults who were related and wanted to sit next to each other, even after the passengers expressed that they did not want to move for that purpose. on the connecting flight, the “service” consisted of items for purchase. even though the flight was only 45 minutes, once again passengers (including me) were pressured to relocate for people to sit next to each other. they couldn’t be apart for 45 minutes? this was much less compelling than being apart for an 8 hour flight.

Everything went smoothly, and we even arrived 40min earlier than scheduled, on an Orland-Madrid route.

The staff was very nice and helpful. Some of the best crew I have met.

Disaster. Downgraded. Zero apology. No effort or coordination between gate and crew. Awful seat blocked by door emergency slide box. Iberia is a mess. App never works. Avoid this airline.

We departed late but made up most of the time in flight. Our ticket was pure economy, so it wasn’t anything fancy; however, I heard that we arrived in Madrid at the exact same time that First Class passengers arrived! Overall, our experience was similar to what we had on other American Airlines transatlantic flights - good value at a reasonable price. We were even able to get our carry-on baggage onto the plane without needing to gate check it.

Wonderful business class flight in a lovely new plane with an excellent crew

The luggage problem I previously mentioned was actually this flight

Getting the boarding passes between the BA and AA apps was very clunky.

The plane was dirty the food was awful and the boarding process took too long

I don't know about the others but the flight attendant that took care of us had the absolute wrong approach "how do we dare asking for water or anything else for that matter"

Three major things that led to my low rating, 1. Internet wasn't available for the whole time, and 2. TV became available way into flight, after numerous system reboots, and 3. Food is not good at all.

It would be great to have at least two choices for a food, instead of just plain pasta 😏

Horrendous, the worst ever. I would not fly with them again

Not sure if the crew were experiencing something unknown to me,but the service of passing water was non-existent.In addition,please take consideration when providing yogurt as alternative for breakfast as some of us, could be lactose intolerant.. thanks

When you pay for seat selection but there website doesn't allow you to check in, they shouldn't force you to a middle seat where both random people around you invade your seat

Everything you need to know for your flight from St. Louis to Madrid

Information on your arrival and departure airports