STL - MAD

$279 Find Cheap Flights from St. Louis to Madrid

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 3/28. 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

KAYAK searches hundreds of travel sites at once for deals on flights to Madrid

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from St. Louis to Madrid.
These are the airlines KAYAK users have selected most often from within our search results in flight searches from St. Louis to Madrid.
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Everything you should know

Cheapest round-trip
$431
Overall average: $845
British Airways
Mon 3/9Mon 3/16
STL - MAD • 2 stops
Cheapest one-way
$263
Typical prices: $381-$637
Air Canada
Sat 3/28
STL - MAD • 2 stops
When to travel
November
Cheapest • 28% price drop
March
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
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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

Mon, Mar 9 - Mon, Mar 16
British Airways Logo
9:35 am - 1:35 pm
STL
-
MAD
22h 00m
2 stops
British Airways Logo
7:25 pm - 11:48 pm
MAD
-
STL
34h 23m
2 stops
$431British Airways
Sat, Mar 21 - Mon, Mar 30
British Airways Logo
6:50 pm - 8:25 am
STL
-
MAD
31h 35m
1 stop
British Airways Logo
9:00 pm - 9:11 pm
MAD
-
STL
31h 11m
2 stops
$435British Airways
Tue, Mar 3 - Wed, Mar 18
British Airways Logo
2:00 pm - 4:55 pm
STL
-
MAD
19h 55m
2 stops
British Airways Logo
12:30 pm - 6:07 pm
MAD
-
STL
35h 37m
1 stop
$436British Airways
Tue, Mar 3 - Tue, Mar 17
British Airways Logo
2:00 pm - 8:55 am
STL
-
MAD
11h 55m
1 stop
British Airways Logo
1:45 pm - 11:02 pm
MAD
-
STL
15h 17m
1 stop
$439British Airways
Wed, Feb 11 - Wed, Feb 18
British Airways Logo
5:04 pm - 7:10 pm
STL
-
MAD
19h 06m
2 stops
British Airways Logo
12:40 pm - 11:22 pm
MAD
-
STL
17h 42m
1 stop
$441British Airways
Tue, Mar 3 - Mon, Mar 16
Lufthansa Logo
7:00 am - 9:15 am
STL
-
MAD
19h 15m
1 stop
Lufthansa Logo
12:40 pm - 2:49 pm
MAD
-
STL
32h 09m
2 stops
$442Lufthansa
Wed, Feb 11 - Wed, Feb 18
British Airways Logo
7:15 am - 9:25 am
STL
-
MAD
19h 10m
1 stop
British Airways Logo
12:40 pm - 11:22 pm
MAD
-
STL
17h 42m
1 stop
$444British Airways
Tue, Mar 3 - Mon, Mar 16
Multiple Airlines Logo
7:00 am - 8:00 am
STL
-
MAD
18h 00m
2 stops
Multiple Airlines Logo
12:40 pm - 2:49 pm
MAD
-
STL
32h 09m
2 stops
$446Multiple Airlines
Mon, Mar 2 - Fri, Mar 13
Air Canada Logo
6:55 pm - 8:00 am
STL
-
MAD
30h 05m
2 stops
Air Canada Logo
12:40 pm - 9:05 pm
MAD
-
STL
38h 25m
2 stops
$447Air Canada
Tue, Feb 17 - Sun, Mar 1
British Airways Logo
2:00 pm - 8:55 am
STL
-
MAD
11h 55m
1 stop
British Airways Logo
1:00 pm - 7:30 pm
MAD
-
STL
13h 30m
1 stop
$449British Airways
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.

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 November, where tickets cost $608 (return) on average. On the other hand, the most expensive months are June and May, where the average cost of round-trip tickets is $1,194 and $1,134 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 1 week before departure. For the absolute cheapest price, our data suggests you should book 22 weeks before departure.

Good to know

Low seasonNovember
Cheapest flight$263
Best time to beat the crowds with an average 29% drop in price.
Most popular time to fly and prices are also 1% 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 3 days, the lowest price for a flight from St. Louis to Madrid was $279 for a one-way ticket and $431 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 7.9, Delta is the most popular choice. United Airlines is also a great choice for the route, with an average price of $944 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.
7.4
United AirlinesOverall score based on 9157 reviews
7.1Entertainment
7.7Boarding
7.3Comfort
8.1Crew
6.6Food
Airline reviews

Yet another flight in which beverage and snack service was skipped. Other that that, firmly mediocre. Landed early, to gate late due to congestion at the gates. Airline's fault or airports fault: unknown.

6.0 GoodMichael, Jan 2026
PDX - SFO
Read more United Airlines reviews

Yet another flight in which beverage and snack service was skipped. Other that that, firmly mediocre. Landed early, to gate late due to congestion at the gates. Airline's fault or airports fault: unknown.

Ineffective communication with United resulted in lost baggage. Their Baggage Tracing counter at MUC was shut down from 11:00-14:15 on my arrival. Undertrained, underinformed staff had me Running all over MUC to find someone to help me to no avail. Staff was rude, unhelpful, and unable to effectively use the systems they did have operational. They refused to contact United in any way or provide any accommodation or other resources while I waited for my luggage. This has destroyed my downstream itinerary. If they had even the slightest visibility I may have been able to reschedule/plan, but again, their staff provided nothing, and did nothing more than their website, which doesn’t even work on a standard phone browser. Miserable failure at all levels that weren’t associated with the operation of the aircraft.

Miserable. They moved my seat, but canceled the next leg of my flight. I resolved the issue at my transfer, but that resulted in lost luggage that has taken days off my schedule with no resolution. Worse, they fail to interface effectively with Lufthansa, forcing me to bounce between two equally useless help desks. The apps are unable to handle the situation, the bag dropped off the tracker, and while the call centers are polite, they do not provide written information to assist with cross-airline communication.

left on time, reasonable boarding process arrived early luggage came out quickly

I like flying first class, and United has a nice one

Teeny tiny bathrooms, crew was not realistic about when we'd arrive.

Check-in, boarding and the flight from Phoenix to Houston was quick and easy. The flight from Houston to Shreveport was delayed 5 hours. It was frustrating but I think United handled it the best they could.

Some flight attendants were great others were cranky. Seats were very tight and sitting on an aisle was very hard as the carts and people walking constantly bumped shoulder and arm.

It was great with United overall except for two things. 1) It was a 5-hour flight and we were with kids, so we were asking for extra snacks. They were extremely reticent to dole them out even though there wasn't any meal and the kids were starting to hit their limit towards the end. 2) Baggage didn't arrive until 80 minutes after we landed.

They lost my luggage, so, not happy. The crew was nice but my suitcases never made it, still trying to find out what happened!

On the plus side, crew was attentive, drinks were cold, and in-flight entertainment selection was better than some other airlines. On the negative aide, Plane was delayed almost an hour, either no announcements from the gate crew. Biscoff cookies are gross, appreciate airlines that give a choice. Also, crew had no personality or enthusiasm at all.

Little warm on the plane and delayed for an hour

Tell the crew (when boarding) to yell at the imbeciles blocking us from walking up to scan. I promise everyone crowds around and half of us (most the time I’m group 4) have to push our way through. Your staff is awesome, the public - not so much-

Bags took over and hour to come out. Delays due to wind caused rebooking.

The flight was good. We had to spend almost an hour on the tarmac when we arrived in Dallas. Waiting for a gate. What’s the point of arriving early if you have no gate to park at?

Lower WiFi prices; allow us to see our flight on a map; more variety of drink choices.

So excited very proud first of all I wanna thank kayak all updates very professional and fast alart And amazing cabin crew so nice to me they deserve big salute

UGH I HAD TO MISS MY FIRST FLIGHT TO TAMPA CAUSE OF THE 10 MINUTE DELAY OF THE ORLANDO TO MIAMI ONE SO THEY HAD ME GET ANOTHER TICKET. I AM NOT HAPPY AT ALL BECAUSE IT MADE ME MISS MY CONNECTING FLIGHT FROM TAMPA TO LONDON AND FORCED ME TO MISS A DAY AT MY ROOM IN THE UK.

Wish they didnt delay off-boarding for 10 minutes so i could connect to my flight from miami to tampa

We experienced gate changes and a long delay. My seat was dirty when I boarded and I had to use wipes to clean it myself. There was an unpleasant and overpowering cleaning product scent on the plane as well that lingered through the flight.

I waiting for 2 hrs to retrieve my luggage. Didn't get home till 3am.

The flight left late and I didn’t get a glass of bubbly upon boarding (which I’m used to when booking business class on other flights), but otherwise it was a pleasant flight with lovely, helpful crew members and I enjoyed my meal.

Flight cancellations, delays, mass confusion and disorganization! That’s Air Canada for you, nothing new. I would have chosen a different airline if it were an option, and Air Canada continues to prove they don’t care about their customers.

everything was fine. but paying for 1 piece of check-in luggage and denying passengers to board with carry-on luggage which by air line's standards does not fit is not acceptable. when one travels for a longer time one needs to have some essentials

Couldn't fit knees, only 1 toilet working, didn't get anything to drink cause the stewards were not able to get to us

Flight was canceled for a reason they knew hours before but did not mention. Next the gate chnage from 37 to 38 at least 10 times. Ridiculous.

The flight from SFO to YVR was delayed and my bag did not make it to my next flight from YVR to SYD. It took almost 3 days after I landed to get my bag and when I got it, it was filled with dust

Our biggest complaint about Air Canada is that if you don’t like your seat during check-in, there’s a fee to move elsewhere. On our flight from YUL to FFL, we were charged to change seats—just regular seats. What’s maddening is that the plane wasn’t even full; there were even a few people sleeping in the middle row sections (entire rows, completely empty), using them as beds. In my opinion, charging passengers for seat changes is a cash grab by Air Canada. They are definitely not the airline they were back in the day. I suppose they need to gouge the consumer now that they pay their attendants while on ground. One out of 10.

Nothing specific. Cabin temperature was too high for some reason.

It was just fine. I managed to make all my connection too sbut had trouble in Munich with no wheel chair and trouble trying to get help from the airport people to get to the other terminal for my flight. Finally a wonderful lady Amelia, helped me to make my flight connection Timon with zero time to spare.

It was fine, older plane with limited entertainment, otherwise fine.

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.

Bad experience. The seat room are very tight. The food is not good and the breakfast has no hot drink.

Excellent. Thanks to United Star Alliance, since economy was overbooked, I’m grateful to have been upgraded to Business Class.

Good plane, excellent food, crew and entertainment. Seats in business could use an upgrade

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.

Flight was OK. Waiting for luggage in Madrid for 55 minutes, unacceptable

Loved the boarding option from Business class lounge, experience on flight was excellent, plenty of good food choices

Late. And service was very slow - passengers sat for well over an hour with dirty trays etc surrounding them

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

The airline was not clear about a new departure time so we got to the airport early anyway. The flight left early which was great because of weather. The check in process was very easy and staff were friendly and helpful. The crew was great and our flight was very good.

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

Awful it always is unfortunately is the only way to fly direct to london

I travelled in business class and was disappointed by lack of service, curt and borderline rude time of the crew and to top it off, all of my luggage was delayed. It was like pulling teeth to even report the missing luggage and recover it the next day from the airport.

Plane was extremely delayed, but not all of it was BA fault (some was). Worst part was lack of room - this had as much space as an Allegiant flight. I thought transatlantic usually gave you an extra inch or two, but not this one. Entertainment system sporadically worked and didn’t have great options. Overhead bins are old and tiny, not as good as aunties new planes.

Boarding was poor. All groups called immediately one after the other resulting in a long queue in the jetty/jet bridge. Seats were very hard and and did not recline on a 4.5 hour flight. No food was available. Plane was cold. There was no entertainment.

The cramped seats are cruel and unusual punishment and may violate the Geneva code.

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

Information on your arrival and departure airports