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$360+ Cheap flights from Barcelona-El Prat (BCN) to St. Louis (STL)

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 10/23. Fares are subject to change and may not be available on all flights or dates of travel.
BCN — STL
Oct 11 — Oct 181
Sat 10/11
Sat 10/18
1 adult, Economy
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Cheap flight deals from Barcelona-El Prat to St. Louis

Discover tips and strategies to find the most affordable flight options for your journey from Barcelona-El Prat (BCN) to St. Louis (STL). 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 September 11, 2025.

Round-trip from

$702
(American Airlines)

One-way from

$360
(Kiwi.com)

Popular in

January

Cheapest in

October

Average price

$761
From Barcelona-El Prat to Lambert-St Louis
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One-way flight from Barcelona-El Prat to Lambert-St Louis
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Highest demand for flights based on searches. 4% potential increase in price ($44 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($24 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Find flight deals from Barcelona-El Prat to St. Louis

Cheapest flights from Barcelona-El Prat to St. Louis
Explore the most affordable flight options available from Barcelona-El Prat to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 11, 2025.

This American Airlines deal was found by Cheapflights users on 9/11. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/1812:20 pmBCN - STL
1 stop14h 56mAmerican Airlines
Mon 9/221:53 pmSTL - BCN
1 stop13h 37mAmerican Airlines
Deal found 9/11$702
This Finnair deal was found by Cheapflights users on 9/10. 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 Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/1212:50 pmBCN - STL
1 stop15h 10mMultiple Airlines
Mon 11/176:00 amSTL - BCN
1 stop20h 00mMultiple Airlines
Deal found 9/10$703
This Expedia deal was found by Cheapflights users on 9/10. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/182:00 pmBCN - STL
1 stop14h 06mIberia
Mon 9/221:03 pmSTL - BCN
1 stop13h 02mIberia
Deal found 9/10$704
This Iberia deal was found by Cheapflights users on 9/9. 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/232:00 pmBCN - STL
1 stop14h 06mIberia
Mon 9/291:03 pmSTL - BCN
1 stop13h 02mIberia
Deal found 9/9$738
This American Airlines deal was found by Cheapflights users on 9/9. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/242:00 pmBCN - STL
2 stops16h 07mAmerican Airlines
Wed 10/19:57 amSTL - BCN
2 stops13h 48mAmerican Airlines
Deal found 9/9$740

Cheapflights Fare Finder

 
Customize your flight search to find flights from Barcelona-El Prat to St. Louis 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 September 11, 2025.
Use the filters below to find and compare flights from Barcelona-El Prat Airport to St. Louis that are best for you.

Fly from

Barcelona-El Prat

Fly to

St. Louis

Route

Depart

Return

Price

BarcelonaSt. Louis

BCN - STL

BCNSTL

Barcelona-El Prat

Thu 9/18

12:20 pm-8:16 pm

1 stop14h 56m

Lambert-St Louis

Mon 9/22

1:53 pm-10:30 am

1 stop13h 37m

$702

BarcelonaSt. Louis

BCN - STL

BCNSTL

Barcelona-El Prat

Wed 11/12

12:50 pm-9:00 pm

1 stop15h 10m

Lambert-St Louis

Mon 11/17

6:00 am-9:00 am

1 stop20h 00m

$703

BarcelonaSt. Louis

BCN - STL

BCNSTL

Barcelona-El Prat

Wed 9/24

10:45 am-8:32 pm

1 stop16h 47m

Lambert-St Louis

Wed 10/1

12:28 pm-10:10 am

1 stop14h 42m

$703

BarcelonaSt. Louis

BCN - STL

BCNSTL

Barcelona-El Prat

Thu 9/18

2:00 pm-9:06 pm

1 stop14h 06m

Lambert-St Louis

Mon 9/22

3:56 pm-10:30 am

1 stop11h 34m

$704

BarcelonaSt. Louis

BCN - STL

BCNSTL

Barcelona-El Prat

Thu 10/23

6:30 pm-5:47 pm

2 stops30h 17m

$360

BarcelonaSt. Louis

BCN - STL

BCNSTL

Barcelona-El Prat

Wed 11/19

6:35 pm-4:30 pm

2 stops28h 55m

$383

BarcelonaSt. Louis

BCN - STL

BCNSTL

Barcelona-El Prat

Tue 10/21

10:40 pm-10:37 am

3 stops42h 57m

$392

BarcelonaSt. Louis

BCN - STL

BCNSTL

Barcelona-El Prat

Fri 10/24

10:40 pm-12:00 pm

3 stops44h 20m

$396

BarcelonaSt. Louis

BCN - STL

BCNSTL

Barcelona-El Prat

Tue 11/18

6:45 am-9:07 am

3 stops33h 22m

$420

BarcelonaSt. Louis

BCN - STL

BCNSTL

Barcelona-El Prat

Thu 11/20

6:00 am-11:57 pm

2 stops24h 57m

$429

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/8

Showing 1-10 of 15 results
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Best time to book a flight from Barcelona-El Prat to St. Louis

Have a flexible travel schedule? Discover the best time to fly to St. Louis from Barcelona-El Prat with our price prediction graph.
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 Barcelona-El Prat Airport to St. Louis

What is the cheapest month to book a flight from Barcelona-El Prat Airport to St. Louis?

Currently, August is the cheapest month in which you can book a flight from Barcelona-El Prat Airport to St. Louis (average of $311). Flying from Barcelona-El Prat Airport to St. Louis in March is currently the most expensive (average of $356). 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.

What is the cheapest time of day to fly from BCN to STL?

Find hourly flight availability from Barcelona-El Prat to St. Louis. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 11, 2025.

When flying from Barcelona-El Prat Airport to St. Louis, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Related info for your journey

Find useful and relevant information for your journey from Barcelona-El Prat to St. Louis. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to St. Louis from Barcelona-El Prat?

    Lambert-St Louis (STL), located 12.7 mi from the city center, is the airport you fly into when you book flights from Barcelona-El Prat to St. Louis. 0 airlines have flights to Lambert-St Louis from Barcelona-El Prat on a regular basis. Booking flights from Barcelona-El Prat to Lambert-St Louis should not be difficult; the airport handles an average of 0 inbound flights from Barcelona-El Prat per day.

  • How long is the flight from Barcelona-El Prat Airport to St. Louis?

    There are many flights that can get you from Barcelona-El Prat Airport to St. Louis in 14h 56m. Fly via American Airlines or Iberia to get the fastest option. The distance between Barcelona-El Prat Airport and St. Louis is about 4638 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • Can I find deals for flights from Barcelona-El Prat to St. Louis that include hotel bookings?

    Yes. In addition to deals on Barcelona-El Prat to St. Louis flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Barcelona-El Prat to St. Louis?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Barcelona-El Prat to St. Louis.

  • Can I find deals for business class flights from Barcelona-El Prat to St. Louis?

    Yes. Cheapflights offers flight deals from Barcelona-El Prat to St. Louis by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Barcelona-El Prat Airport to St. Louis?

    Currently, August is the cheapest month in which you can book a flight from Barcelona-El Prat Airport to St. Louis (average of $311). Flying from Barcelona-El Prat Airport to St. Louis in March is currently the most expensive (average of $356). 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.

See more FAQs

Traveling to a place near St. Louis?

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Farmington
Festus

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