$373+ Cheap flights from St. Louis (STL) to Madrid, Spain (MAD)
This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 8/2. Fares are subject to change and may not be available on all flights or dates of travel.
STL — MAD
Jul 19 — Jul 261
Round-trip
1 adult, Economy
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Find cheap flights from St. Louis to Madrid with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
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Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from St. Louis to Madrid
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Best
Last-minute
One-way
Cheapest flights from St. Louis to MadridExplore the most affordable flight options available from St. Louis to Madrid. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 19, 2026.
Explore the most affordable flight options available from St. Louis to Madrid. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 19, 2026.
This Gotogate deal was found by Cheapflights users on 6/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/2912:10 pm
STL
- MAD
1 stop11h 40m
Multiple Airlines
Fri 10/912:45 pm
MAD
- STL
1 stop12h 56m
Multiple Airlines
Deal found 6/18![Multiple Airlines logo]()
$704
This United Airlines deal was found by Cheapflights users on 6/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/2912:10 pm
STL
- MAD
1 stop11h 40m
United Airlines
Fri 10/912:45 pm
MAD
- STL
2 stops33h 58m
United Airlines
Deal found 6/19![United Airlines logo]()
$714
This Cheapflightsfares deal was found by Cheapflights users on 6/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/79:35 pm
STL
- MAD
1 stop15h 30m
British Airways
Wed 10/2110:35 am
MAD
- STL
1 stop15h 55m
British Airways
Deal found 6/15![British Airways logo]()
$719
This oojo deal was found by Cheapflights users on 6/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/69:35 pm
STL
- MAD
1 stop29h 05m
British Airways
Fri 10/1612:40 pm
MAD
- STL
1 stop17h 51m
British Airways
Deal found 6/15![British Airways logo]()
$720
This oojo deal was found by Cheapflights users on 6/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/219:35 pm
STL
- MAD
1 stop15h 30m
British Airways
Fri 10/301:15 pm
MAD
- STL
1 stop16h 26m
British Airways
Deal found 6/15![British Airways logo]()
$721
This oojo deal was found by Cheapflights users on 6/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/299:35 pm
STL
- MAD
1 stop29h 05m
British Airways
Fri 10/93:25 pm
MAD
- STL
1 stop15h 16m
British Airways
Deal found 6/18![British Airways logo]()
$722
This Cheapflightsfares deal was found by Cheapflights users on 6/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/287:01 pm
STL
- MAD
2 stops20h 29m
Lufthansa
Fri 10/96:00 am
MAD
- STL
1 stop14h 25m
Lufthansa
Deal found 6/19![Lufthansa logo]()
$725
This United Airlines deal was found by Cheapflights users on 6/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/66:30 am
STL
- MAD
1 stop19h 45m
United Airlines
Wed 12/96:00 am
MAD
- STL
1 stop14h 45m
United Airlines
Deal found 6/18![United Airlines logo]()
$726
Best flights from St. Louis to MadridDiscover carefully curated flight deals from St. Louis to Madrid that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated June 19, 2026.
Discover carefully curated flight deals from St. Louis to Madrid that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated June 19, 2026.
This United Airlines deal was found by Cheapflights users on 6/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/155:30 pm
STL
- MAD
2 stops32h 20m
United Airlines
Wed 9/1612:45 pm
MAD
- STL
2 stops30h 12m
United Airlines
Deal found 6/18![United Airlines logo]()
$779
This Delta deal was found by Cheapflights users on 6/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/155:23 pm
STL
- MAD
1 stop11h 52m
Delta
Sun 9/139:50 am
MAD
- STL
1 stop18h 00m
Delta
Deal found 6/18![Delta logo]()
$896
This United Airlines deal was found by Cheapflights users on 6/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/158:40 am
STL
- MAD
1 stop16h 25m
United Airlines
Tue 9/155:55 am
MAD
- STL
1 stop14h 30m
United Airlines
Deal found 6/18![United Airlines logo]()
$836
This Delta deal was found by Cheapflights users on 6/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/153:44 pm
STL
- MAD
1 stop13h 31m
Delta
Mon 9/149:50 am
MAD
- STL
1 stop16h 54m
Delta
Deal found 6/18![Delta logo]()
$896
This United Airlines deal was found by Cheapflights users on 6/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/1512:44 pm
STL
- MAD
1 stop12h 21m
United Airlines
Thu 9/171:30 pm
MAD
- STL
1 stop31h 30m
United Airlines
Deal found 6/18![United Airlines logo]()
$844
This United Airlines deal was found by Cheapflights users on 6/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/267:00 am
STL
- MAD
3 stops16h 50m
United Airlines
Tue 9/81:30 pm
MAD
- STL
2 stops29h 27m
United Airlines
Deal found 6/18![United Airlines logo]()
$876
This United Airlines deal was found by Cheapflights users on 6/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/36:01 am
STL
- MAD
1 stop19h 59m
United Airlines
Wed 8/1911:15 am
MAD
- STL
2 stops28h 24m
United Airlines
Deal found 6/14![United Airlines logo]()
$877
This United Airlines deal was found by Cheapflights users on 6/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/294:50 pm
STL
- MAD
1 stop33h 10m
United Airlines
Sun 9/61:30 pm
MAD
- STL
1 stop31h 32m
United Airlines
Deal found 6/14![United Airlines logo]()
$924
This United Airlines deal was found by Cheapflights users on 6/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/612:10 pm
STL
- MAD
1 stop11h 40m
United Airlines
Thu 8/1311:15 am
MAD
- STL
1 stop14h 56m
United Airlines
Deal found 6/16![United Airlines logo]()
$936
This United Airlines deal was found by Cheapflights users on 6/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/2712:10 pm
STL
- MAD
1 stop11h 40m
United Airlines
Tue 9/81:30 pm
MAD
- STL
2 stops31h 45m
United Airlines
Deal found 6/17![United Airlines logo]()
$941
Last-minute flights from St. Louis to MadridDiscover last-minute flight deals from St. Louis to Madrid. Data last updated June 19, 2026 and is based on user searches.
Discover last-minute flight deals from St. Louis to Madrid. Data last updated June 19, 2026 and is based on user searches.
This Gotogate deal was found by Cheapflights users on 6/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/1712:10 pm
STL
- MAD
1 stop11h 40m
Multiple Airlines
Mon 7/271:25 pm
MAD
- STL
1 stop31h 00m
Multiple Airlines
Deal found 6/16![Multiple Airlines logo]()
$1,026
This United Airlines deal was found by Cheapflights users on 6/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/216:01 am
STL
- MAD
1 stop19h 59m
United Airlines
Mon 8/31:25 pm
MAD
- STL
1 stop31h 00m
United Airlines
Deal found 6/14![United Airlines logo]()
$989
This Cheapflightsfares deal was found by Cheapflights users on 6/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/211:13 pm
STL
- MAD
2 stops19h 57m
Lufthansa
Mon 8/36:25 pm
MAD
- STL
2 stops26h 00m
Lufthansa
Deal found 6/14![Lufthansa logo]()
$1,001
This United Airlines deal was found by Cheapflights users on 6/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/2212:10 pm
STL
- MAD
1 stop11h 40m
United Airlines
Thu 7/306:05 am
MAD
- STL
2 stops24h 39m
United Airlines
Deal found 6/16![United Airlines logo]()
$977
This Delta deal was found by Cheapflights users on 6/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/225:36 pm
STL
- MAD
2 stops16h 09m
Delta
Thu 7/306:00 am
MAD
- STL
2 stops21h 37m
Delta
Deal found 6/19![Delta logo]()
$981
This Justfly.com deal was found by Cheapflights users on 6/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/228:38 am
STL
- MAD
1 stop17h 27m
British Airways
Thu 7/303:25 pm
MAD
- STL
1 stop15h 07m
British Airways
Deal found 6/16![British Airways logo]()
$1,004
This Orbitz deal was found by Cheapflights users on 6/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/2712:10 pm
STL
- MAD
1 stop11h 40m
Air Canada
Fri 8/71:30 pm
MAD
- STL
1 stop31h 32m
Air Canada
Deal found 6/14![Air Canada logo]()
$864
This United Airlines deal was found by Cheapflights users on 6/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/2712:10 pm
STL
- MAD
1 stop11h 40m
United Airlines
Fri 8/71:30 pm
MAD
- STL
2 stops38h 56m
United Airlines
Deal found 6/14![United Airlines logo]()
$871
One-way flights from St. Louis to MadridSearch for one-way flight options from St. Louis to Madrid. Find affordable one-way fares based on user searches. Data last updated June 19, 2026.
Search for one-way flight options from St. Louis to Madrid. Find affordable one-way fares based on user searches. Data last updated June 19, 2026.
This Kiwi.com deal was found by Cheapflights users on 6/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/26:34 pm
STL
- MAD
3 stops44h 51m
Multiple Airlines
Deal found 6/17![Multiple Airlines logo]()
$373
This Kiwi.com deal was found by Cheapflights users on 6/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/256:33 pm
STL
- MAD
3 stops41h 37m
Multiple Airlines
Deal found 6/14![Multiple Airlines logo]()
$422
This oojo deal was found by Cheapflights users on 6/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/151:54 pm
STL
- MAD
1 stop12h 41m
British Airways
Deal found 6/16![British Airways logo]()
$429
This Lufthansa deal was found by Cheapflights users on 6/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/253:30 pm
STL
- MAD
1 stop17h 40m
Lufthansa
Deal found 6/14![Lufthansa logo]()
$431
This Travelocity deal was found by Cheapflights users on 6/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/212:10 pm
STL
- MAD
1 stop11h 40m
Air Canada
Deal found 6/17![Air Canada logo]()
$442
This Orbitz deal was found by Cheapflights users on 6/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/2612:10 pm
STL
- MAD
1 stop11h 40m
Air Canada
Deal found 6/17![Air Canada logo]()
$446
This Gotogate deal was found by Cheapflights users on 6/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/2512:10 pm
STL
- MAD
2 stops22h 30m
Air Canada
Deal found 6/14![Air Canada logo]()
$450
This United Airlines deal was found by Cheapflights users on 6/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/156:15 am
STL
- MAD
2 stops19h 45m
United Airlines
Deal found 6/16![United Airlines logo]()
$451
This Mytrip deal was found by Cheapflights users on 6/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/2612:10 pm
STL
- MAD
1 stop11h 40m
Multiple Airlines
Deal found 6/14![Multiple Airlines logo]()
$455
This United Airlines deal was found by Cheapflights users on 6/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/2612:10 pm
STL
- MAD
1 stop11h 40m
United Airlines
Deal found 6/16![United Airlines logo]()
$462
This Delta deal was found by Cheapflights users on 6/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/267:00 am
STL
- MAD
2 stops19h 55m
Delta
Deal found 6/16![Delta logo]()
$463
Find flight deals from St. Louis to Madrid
Discover tips and strategies to find the most affordable flight options for your journey from St. Louis (STL) to Madrid (MAD). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated June 19, 2026.
Most accurate provider | Ovago 3 stars |
|---|---|
Most trusted provider | Ovago 3 stars |
Round-trip from | $704 (Gotogate) |
One-way from | $373 (Kiwi.com) |
Popular in | June |
Cheapest in | December |
Average price | $1,465 |
Cheapflights 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, Cheapflights users made 2,558,603 searches. Data last updated June 19, 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
Cheapest round-trip
St. LouisMadrid
STL - MAD
STLMAD
Lambert-St Louis
Sat 8/15
5:30 pm-8:50 am
2 stops32h 20m
Madrid Barajas
Wed 9/16
12:45 pm-11:57 am
2 stops30h 12m
$779
St. LouisMadrid
STL - MAD
STLMAD
Lambert-St Louis
Sat 8/15
8:40 am-8:05 am
1 stop16h 25m
Madrid Barajas
Tue 9/15
5:55 am-1:25 pm
1 stop14h 30m
$836
St. LouisMadrid
STL - MAD
STLMAD
Lambert-St Louis
Sat 8/15
12:44 pm-8:05 am
1 stop12h 21m
Madrid Barajas
Thu 9/17
1:30 pm-2:00 pm
1 stop31h 30m
$844
St. LouisMadrid
STL - MAD
STLMAD
Lambert-St Louis
Wed 8/26
7:00 am-6:50 am
3 stops16h 50m
Madrid Barajas
Tue 9/8
1:30 pm-11:57 am
2 stops29h 27m
$876
St. LouisMadrid
STL - MAD
STLMAD
Lambert-St Louis
Mon 8/3
6:01 am-9:00 am
1 stop19h 59m
Madrid Barajas
Wed 8/19
11:15 am-8:39 am
2 stops28h 24m
$877
St. LouisMadrid
STL - MAD
STLMAD
Lambert-St Louis
Sat 8/15
5:23 pm-12:15 pm
1 stop11h 52m
Madrid Barajas
Sun 9/13
9:50 am-8:50 pm
1 stop18h 00m
$896
St. LouisMadrid
STL - MAD
STLMAD
Lambert-St Louis
Sat 8/15
3:44 pm-12:15 pm
1 stop13h 31m
Madrid Barajas
Mon 9/14
9:50 am-7:44 pm
1 stop16h 54m
$896
St. LouisMadrid
STL - MAD
STLMAD
Lambert-St Louis
Sat 8/29
4:50 pm-9:00 am
1 stop33h 10m
Madrid Barajas
Sun 9/6
1:30 pm-2:02 pm
1 stop31h 32m
$924
Quickest round-trip
St. LouisMadrid
STL - MAD
STLMAD
Lambert-St Louis
Thu 8/6
12:10 pm-6:50 am
1 stop11h 40m
Madrid Barajas
Thu 8/13
11:15 am-7:11 pm
1 stop14h 56m
$936
St. LouisMadrid
STL - MAD
STLMAD
Lambert-St Louis
Thu 8/27
12:10 pm-6:50 am
1 stop11h 40m
Madrid Barajas
Tue 9/8
1:30 pm-2:15 pm
2 stops31h 45m
$941
Showing 1-10 of 16 resultsSorted by cheapest first
Compare providers for flights from St. Louis to Madrid
Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from St. Louis to Madrid in June.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars |
- Most accurate provider: When it comes to deals on St. Louis-Madrid flights, users find the pricing of Ovago to be most consistent on Cheapflights vs. Ovago Users can find the same prices on St. Louis-Madrid flight deals on Cheapflights vs. Ovago >95% of the time. Price accuracy is based on data collected from St. Louis-Madrid flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on St. Louis-Madrid flights, Cheapflights users trust Ovago the most. Ovago has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for St. Louis-Madrid flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.
Best time to book a flight from St. Louis to Madrid
Have a flexible travel schedule? Discover the best time to fly to Madrid from St. Louis with our price prediction graph.
STL-MAD
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.
Cheapflights Insights
Everything you need to know about your flight from St. Louis to Madrid
How far ahead should I book a flight from St. Louis to Madrid?
The best time to book flights from St. Louis to Madrid is 35 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.
What is the cheapest month to book a flight from St. Louis to Madrid?
Currently, December is the cheapest month in which you can book a flight from St. Louis to Madrid (average of $666). Flying from St. Louis to Madrid in June is currently the most expensive (average of $1,465). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
How much does it cost to fly round-trip from St. Louis to Madrid?
Reviews of airlines servicing Madrid
Get insights into the airlines that provide service to Madrid. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Madrid. Reviews last updated June 19, 2026.
Get a feel of what it's like to fly with Delta,United Airlines, andAmerican Airlines from St. Louis to Madrid by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Overall
7.8
Boarding
8.1
Entertainment
7.8
Comfort
7.8
Food
7.2
Crew
8.5
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Overall
7.8
Boarding
8.1
Entertainment
7.8
Comfort
7.8
Food
7.2
Crew
8.5
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Overall
7.8
Boarding
8.1
Entertainment
7.8
Comfort
7.8
Food
7.2
Crew
8.5
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Overall
7.8
Boarding
8.1
Entertainment
7.8
Comfort
7.8
Food
7.2
Crew
8.5
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Overall
7.8
Boarding
8.1
Entertainment
7.8
Comfort
7.8
Food
7.2
Crew
8.5
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Overall
7.8
Boarding
8.1
Entertainment
7.8
Comfort
7.8
Food
7.2
Crew
8.5
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Related info for your journey
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Top 6 airlines flying from St. Louis to Madrid
Discover the top 6 airlines that operate flights from St. Louis to Madrid. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated June 19, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$482 | Average$796 | FlexibilityNo cancel fee | On-time76% | |
| Cheapest$489 | Average$788 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$516 | Average$746 | FlexibilityNo cancel fee | On-time70% | |
| Cheapest$523 | Average$771 | FlexibilityNo cancel fee | On-time77% | |
| Cheapest$578 | Average$1,045 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$581 | Average$781 | FlexibilityNo cancel fee | On-time71% |