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$394+ 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 5/18. Fares are subject to change and may not be available on all flights or dates of travel.
BCN — STL
Mar 10 — Mar 171
Mon 3/10
Mon 3/17
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 March 5, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$709
(Finnair)

One-way from

$394
(Kiwi.com)

Popular in

January

Cheapest in

October

Average price

$720
Provider with most accurate pricing for Barcelona-El Prat-Lambert-St Louis flight deals.
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Provider most trusted by Cheapflights users for Barcelona-El Prat-Lambert-St Louis flights.
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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. 5% potential increase in price ($55 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 March 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 March 5, 2025.

This American Airlines deal was found by Cheapflights users on 3/4. 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 3/1311:00 amBCN - STL
1 stop35h 12mAmerican Airlines
Tue 3/186:00 amSTL - BCN
1 stop21h 00mAmerican Airlines
Deal found 3/4$646
This lol.travel deal was found by Cheapflights users on 3/5. 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 lol.travel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/136:40 amBCN - STL
2 stops20h 01mIberia
Tue 3/182:21 pmSTL - BCN
2 stops17h 19mIberia
Deal found 3/5$702
This Finnair deal was found by Cheapflights users on 3/4. 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.
Tue 4/2210:45 amBCN - STL
1 stop18h 27mMultiple Airlines
Tue 5/202:20 pmSTL - BCN
1 stop14h 55mMultiple Airlines
Deal found 3/4$709
This United Airlines deal was found by Cheapflights users on 3/4. 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 11/1212:15 pmBCN - STL
3 stops34h 06mUnited Airlines
Mon 11/176:45 amSTL - BCN
2 stops20h 05mUnited Airlines
Deal found 3/4$727
This Flighttix deal was found by Cheapflights users on 3/5. 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 Flighttix is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/2311:35 amBCN - STL
1 stop35h 51mVirgin Atlantic
Sat 4/264:15 pmSTL - BCN
1 stop34h 05mVirgin Atlantic
Deal found 3/5$798
This Gotogate deal was found by Cheapflights users on 3/5. 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.
Wed 8/612:10 pmBCN - STL
2 stops38h 30mAir Canada
Wed 8/2011:45 amSTL - BCN
2 stops37h 05mAir Canada
Deal found 3/5$1,071
This British Airways deal was found by Cheapflights users on 3/5. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/610:45 amBCN - STL
1 stop18h 04mBritish Airways
Wed 8/202:02 pmSTL - BCN
1 stop13h 08mBritish Airways
Deal found 3/5$1,077
This Delta deal was found by Cheapflights users on 3/5. 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.
Tue 8/59:55 amBCN - STL
2 stops20h 44mDelta
Tue 8/195:45 pmSTL - BCN
2 stops14h 05mDelta
Deal found 3/5$1,094

Find flights from Barcelona-El Prat to St. Louis within your budget

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 March 5, 2025.

Fly from

Barcelona-El Prat

Fly to

St. Louis

Route

Depart

Return

Price

BarcelonaSt. Louis

BCN - STL

BCNSTL

Barcelona-El Prat

Tue 4/22

10:45 am-10:12 pm

1 stop18h 27m

Lambert-St Louis

Tue 5/20

2:20 pm-12:15 pm

1 stop14h 55m

$709

BarcelonaSt. Louis

BCN - STL

BCNSTL

Barcelona-El Prat

Tue 4/22

6:00 am-3:47 pm

2 stops16h 47m

Lambert-St Louis

Tue 5/20

8:00 am-7:50 am

2 stops16h 50m

$755

BarcelonaSt. Louis

BCN - STL

BCNSTL

Barcelona-El Prat

Wed 4/23

11:35 am-4:26 pm

1 stop35h 51m

Lambert-St Louis

Sat 4/26

4:15 pm-9:20 am

1 stop34h 05m

$798

BarcelonaSt. Louis

BCN - STL

BCNSTL

Barcelona-El Prat

Wed 8/6

12:10 pm-7:40 pm

2 stops38h 30m

Lambert-St Louis

Wed 8/20

11:45 am-7:50 am

2 stops37h 05m

$1,071

BarcelonaSt. Louis

BCN - STL

BCNSTL

Barcelona-El Prat

Wed 8/6

10:45 am-9:49 pm

1 stop18h 04m

Lambert-St Louis

Wed 8/20

2:02 pm-10:10 am

1 stop13h 08m

$1,077

BarcelonaSt. Louis

BCN - STL

BCNSTL

Barcelona-El Prat

Tue 8/5

9:55 am-11:39 pm

2 stops20h 44m

Lambert-St Louis

Tue 8/19

5:45 pm-2:50 pm

2 stops14h 05m

$1,094

BarcelonaSt. Louis

BCN - STL

BCNSTL

Barcelona-El Prat

Sun 5/18

6:15 am-12:06 am

3 stops48h 51m

$394

BarcelonaSt. Louis

BCN - STL

BCNSTL

Barcelona-El Prat

Thu 5/22

11:00 am-11:51 pm

2 stops19h 51m

$573

BarcelonaSt. Louis

BCN - STL

BCNSTL

Barcelona-El Prat

Sat 5/17

10:45 am-9:52 pm

1 stop18h 07m

$682

BarcelonaSt. Louis

BCN - STL

BCNSTL

Barcelona-El Prat

Thu 5/22

9:30 am-6:01 pm

1 stop15h 31m

$702

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/4

Showing 1-10 of 16 results
1
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Compare providers for flights from Barcelona-El Prat to St. Louis

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 Barcelona-El Prat to St. Louis in March.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Barcelona-El Prat Airport-St. Louis flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Barcelona-El Prat Airport-St. Louis flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Barcelona-El Prat Airport-St. Louis flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Barcelona-El Prat Airport-St. Louis flights, Cheapflights users trust FlightHub the most. FlightHub 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 Barcelona-El Prat Airport-St. Louis 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 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.

Travel insights for flights from Barcelona-El Prat to St. Louis

Get recent, data-driven insights about flights from Barcelona-El Prat to St. Louis including ideal travel times, pricing trends, and more.

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 March 5, 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.

Rainfall in St. Louis by month

Plan your trip to St. Louis by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in St. Louis ranges from 2.2 - 4.7 inches per month. May is typically the wettest month, when rainfall can reach 4.7 in. February is typically the driest time to visit St. Louis when rainfall is around 2.2 in.

Temperature in St. Louis by month

Plan your trip to St. Louis by taking into account the average temperature totals by month.

If weather is an important factor for your trip to St. Louis, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 80.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 32.0 F).

Reviews of airlines servicing St. Louis

Get insights into the airlines that provide service to St. Louis. 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 St. Louis. Reviews last updated March 5, 2025.
Delta
8.0
Very good
8,044 reviews

Boarding

8.2

Comfort

8.0

Overall

8.0

Food

7.3

Crew

8.5

Entertainment

7.9

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Delta
8.0
Very good
8,044 reviews
Delta
8.0
Very good
8,044 reviews

Boarding

8.2

Comfort

8.0

Overall

8.0

Food

7.3

Crew

8.5

Entertainment

7.9

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

KLM
7.8
Good
1,321 reviews
Delta
8.0
Very good
8,044 reviews

Boarding

8.2

Comfort

8.0

Overall

8.0

Food

7.3

Crew

8.5

Entertainment

7.9

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Finnair
7.6
Good
1,271 reviews
Delta
8.0
Very good
8,044 reviews

Boarding

8.2

Comfort

8.0

Overall

8.0

Food

7.3

Crew

8.5

Entertainment

7.9

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

United Airlines
7.4
Good
8,655 reviews
Delta
8.0
Very good
8,044 reviews

Boarding

8.2

Comfort

8.0

Overall

8.0

Food

7.3

Crew

8.5

Entertainment

7.9

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Virgin Atlantic
7.4
Good
644 reviews
Delta
8.0
Very good
8,044 reviews

Boarding

8.2

Comfort

8.0

Overall

8.0

Food

7.3

Crew

8.5

Entertainment

7.9

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

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.

  • What are the cheapest airlines flying from Barcelona-El Prat Airport to St. Louis round-trip?

    United Airlines, at $755, was found to be the cheapest airline from Barcelona-El Prat Airport to St. Louis.Alternate airlines to your destination round-trip include Virgin Atlantic and Air Canada. Users have found that United Airlines is 14% cheaper than the other options available to this destination.

  • What are the cheapest airlines to fly from Barcelona-El Prat Airport to St. Louis one-way?

    To fly one-way, consider booking your trip with Aer Lingus, which is currently one of the cheapest options available, starting at $573. Finnair flights start at $682 while deals on KLM start at $702 one-way.

  • 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 Barcelona-El Prat Airport?

Book flights to Barcelona-El Prat Airport if you plan to visit one of these locations
Fenton
Fairview Heights
Maryland Heights
Collinsville
Wentzville
Eureka
St. Peters
Festus
Alton
Farmington
Chesterfield

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