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St. Louis

$386+ 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 9/10. Fares are subject to change and may not be available on all flights or dates of travel.
BCN — STL
Jun 17 — Jun 241
Tue 6/17
Tue 6/24
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 June 12, 2025.

Round-trip from

$656
(United Airlines)

One-way from

$386
(Kiwi.com)

Popular in

August

Cheapest in

October

Average price

$984
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. 8% potential increase in price ($83 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($26 potential savings vs. average RT price).
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Average for round-trip flights in June 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 June 12, 2025.

This United Airlines deal was found by Cheapflights users on 6/11. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/121:35 pmBCN - STL
2 stops31h 45mUnited Airlines
Mon 11/1712:31 pmSTL - BCN
1 stop17h 34mUnited Airlines
Deal found 6/11$656
This lol.travel deal was found by Cheapflights users on 6/11. 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 lol.travel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/16:50 amBCN - STL
2 stops15h 54mLufthansa
Tue 9/235:30 pmSTL - BCN
1 stop12h 45mLufthansa
Deal found 6/11$662
This Finnair deal was found by Cheapflights users on 6/10. 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 11/121:30 pmBCN - STL
1 stop13h 46mMultiple Airlines
Mon 11/171:45 pmSTL - BCN
1 stop15h 10mMultiple Airlines
Deal found 6/10$680
This British Airways deal was found by Cheapflights users on 6/10. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/110:45 amBCN - STL
1 stop18h 11mBritish Airways
Fri 10/108:01 pmSTL - BCN
2 stops15h 34mBritish Airways
Deal found 6/10$687
This American Airlines deal was found by Cheapflights users on 6/10. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/1211:00 amBCN - STL
1 stop19h 01mAmerican Airlines
Mon 11/1711:20 amSTL - BCN
2 stops14h 40mAmerican Airlines
Deal found 6/10$693
This Iberia deal was found by Cheapflights users on 6/10. 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/3010:45 amBCN - STL
1 stop18h 08mIberia
Wed 10/88:01 pmSTL - BCN
1 stop31h 29mIberia
Deal found 6/10$738
This Air Canada deal was found by Cheapflights users on 6/12. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/912:10 pmBCN - STL
1 stop15h 40mAir Canada
Wed 7/168:00 amSTL - BCN
2 stops16h 50mAir Canada
Deal found 6/12$792
This Delta deal was found by Cheapflights users on 6/12. 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 7/99:25 amBCN - STL
2 stops20h 55mDelta
Wed 7/1610:30 amSTL - BCN
2 stops15h 30mDelta
Deal found 6/12$793
This Austrian Airlines deal was found by Cheapflights users on 6/10. 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 Austrian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/310:00 amBCN - STL
2 stops44h 47mAustrian Airlines
Mon 10/1312:25 pmSTL - BCN
2 stops24h 25mAustrian Airlines
Deal found 6/10$831
This KLM deal was found by Cheapflights users on 6/11. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/2311:35 amBCN - STL
1 stop14h 32mKLM
Sun 12/1411:51 amSTL - BCN
1 stop13h 49mKLM
Deal found 6/11$989
This Trip.com deal was found by Cheapflights users on 6/10. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/2311:35 amBCN - STL
1 stop17h 27mVirgin Atlantic
Sat 12/135:00 pmSTL - BCN
1 stop32h 40mVirgin Atlantic
Deal found 6/10$1,027
This Finnair deal was found by Cheapflights users on 6/10. 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.
Mon 9/299:10 pmBCN - STL
2 stops52h 17mFinnair
Mon 10/131:54 pmSTL - BCN
2 stops25h 56mFinnair
Deal found 6/10$1,209

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 June 12, 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

Wed 11/12

1:35 pm-2:20 pm

2 stops31h 45m

Lambert-St Louis

Mon 11/17

12:31 pm-1:05 pm

1 stop17h 34m

$656

BarcelonaSt. Louis

BCN - STL

BCNSTL

Barcelona-El Prat

Mon 9/1

6:50 am-3:44 pm

2 stops15h 54m

Lambert-St Louis

Tue 9/23

5:30 pm-1:15 pm

1 stop12h 45m

$662

BarcelonaSt. Louis

BCN - STL

BCNSTL

Barcelona-El Prat

Wed 11/12

1:30 pm-8:16 pm

1 stop13h 46m

Lambert-St Louis

Mon 11/17

1:45 pm-11:55 am

1 stop15h 10m

$680

BarcelonaSt. Louis

BCN - STL

BCNSTL

Barcelona-El Prat

Wed 10/1

10:45 am-9:56 pm

1 stop18h 11m

Lambert-St Louis

Fri 10/10

8:01 pm-6:35 pm

2 stops15h 34m

$687

BarcelonaSt. Louis

BCN - STL

BCNSTL

Barcelona-El Prat

Wed 11/12

11:00 am-11:01 pm

1 stop19h 01m

Lambert-St Louis

Mon 11/17

11:20 am-9:00 am

2 stops14h 40m

$693

BarcelonaSt. Louis

BCN - STL

BCNSTL

Barcelona-El Prat

Tue 9/30

10:45 am-9:53 pm

1 stop18h 08m

Lambert-St Louis

Wed 10/8

8:01 pm-10:30 am

1 stop31h 29m

$738

BarcelonaSt. Louis

BCN - STL

BCNSTL

Barcelona-El Prat

Wed 7/9

12:10 pm-8:50 pm

1 stop15h 40m

Lambert-St Louis

Wed 7/16

8:00 am-7:50 am

2 stops16h 50m

$792

BarcelonaSt. Louis

BCN - STL

BCNSTL

Barcelona-El Prat

Wed 7/9

9:25 am-11:20 pm

2 stops20h 55m

Lambert-St Louis

Wed 7/16

10:30 am-9:00 am

2 stops15h 30m

$793

BarcelonaSt. Louis

BCN - STL

BCNSTL

Barcelona-El Prat

Fri 10/3

10:00 am-11:47 pm

2 stops44h 47m

Lambert-St Louis

Mon 10/13

12:25 pm-7:50 pm

2 stops24h 25m

$831

BarcelonaSt. Louis

BCN - STL

BCNSTL

Barcelona-El Prat

Sat 8/23

11:35 am-7:07 pm

1 stop14h 32m

Lambert-St Louis

Sun 12/14

11:51 am-8:40 am

1 stop13h 49m

$989

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/11

Showing 1-10 of 21 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 June 12, 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 June 12, 2025.
Peruse reviews from past customers who have flown with Delta, KLM and Austrian Airlines from Barcelona to St. Louis to help guide your decision. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,950 reviews

Entertainment

7.9

Boarding

8.2

Comfort

7.9

Food

7.3

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Delta
8.0
Very good
7,950 reviews
Delta
8.0
Very good
7,950 reviews

Entertainment

7.9

Boarding

8.2

Comfort

7.9

Food

7.3

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
KLM
7.8
Good
1,358 reviews
Delta
8.0
Very good
7,950 reviews

Entertainment

7.9

Boarding

8.2

Comfort

7.9

Food

7.3

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Austrian Airlines
7.6
Good
802 reviews
Delta
8.0
Very good
7,950 reviews

Entertainment

7.9

Boarding

8.2

Comfort

7.9

Food

7.3

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Finnair
7.6
Good
1,290 reviews
Delta
8.0
Very good
7,950 reviews

Entertainment

7.9

Boarding

8.2

Comfort

7.9

Food

7.3

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
United Airlines
7.4
Good
8,790 reviews
Delta
8.0
Very good
7,950 reviews

Entertainment

7.9

Boarding

8.2

Comfort

7.9

Food

7.3

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

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 $656, was found to be the cheapest airline from Barcelona-El Prat Airport to St. Louis.Alternate airlines to your destination round-trip include Lufthansa and British Airways. Users have found that United Airlines is 26% 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 $577. Lufthansa flights start at $661 while deals on Iberia start at $738 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
O'Fallon
Maryland Heights
Fairview Heights
Collinsville
Eureka
St. Peters
Glencoe
Festus
Alton
Farmington

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