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Barcelona-El Prat

$326+ Cheap flights from St. Louis (STL) to Barcelona-El Prat (BCN)

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 10/12. Fares are subject to change and may not be available on all flights or dates of travel.
STL — BCN
Jul 10 — Jul 171
Fri 7/10
Fri 7/17
1 adult, Economy
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Cheap flight deals from St. Louis to Barcelona-El Prat

Cheapest flights from St. Louis to Barcelona-El Prat
Explore the most affordable flight options available from St. Louis to Barcelona-El Prat. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 10, 2026.

This American Airlines deal was found by Cheapflights users on 6/9. 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 10/149:35 pm
STL
-
BCN
1 stop15h 55m
American Airlines
Wed 10/2811:30 am
BCN
-
STL
1 stop17h 55m
American Airlines
Deal found 6/9$765
This Iberia deal was found by Cheapflights users on 6/9. 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.
Wed 10/149:35 pm
STL
-
BCN
1 stop18h 05m
Iberia
Wed 10/289:45 am
BCN
-
STL
2 stops16h 23m
Iberia
Deal found 6/9$776
This United Airlines deal was found by Cheapflights users on 6/9. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/162:00 pm
STL
-
BCN
1 stop11h 20m
United Airlines
Fri 11/201:35 pm
BCN
-
STL
2 stops27h 52m
United Airlines
Deal found 6/9$783
This FlightHub deal was found by Cheapflights users on 6/9. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/148:00 am
STL
-
BCN
2 stops17h 00m
Air Canada
Wed 10/2812:35 pm
BCN
-
STL
2 stops31h 43m
Air Canada
Deal found 6/9$786
This Cheapflightsfares deal was found by Cheapflights users on 6/9. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/199:35 pm
STL
-
BCN
1 stop15h 55m
British Airways
Tue 10/2010:15 am
BCN
-
STL
1 stop16h 15m
British Airways
Deal found 6/9$789
This CheapOair deal was found by Cheapflights users on 6/9. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/1912:10 pm
STL
-
BCN
1 stop12h 50m
Multiple Airlines
Tue 10/206:40 am
BCN
-
STL
1 stop13h 45m
Multiple Airlines
Deal found 6/9$795
This Expedia deal was found by Cheapflights users on 6/9. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/1912:10 pm
STL
-
BCN
1 stop12h 50m
Air Canada
Tue 10/206:40 am
BCN
-
STL
2 stops19h 01m
Air Canada
Deal found 6/9$798
This United Airlines deal was found by Cheapflights users on 6/9. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/197:00 am
STL
-
BCN
3 stops18h 00m
United Airlines
Tue 10/206:40 am
BCN
-
STL
1 stop13h 45m
United Airlines
Deal found 6/9$800
This United Airlines deal was found by Cheapflights users on 6/7. 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 11/162:00 pm
STL
-
BCN
1 stop11h 20m
United Airlines
Thu 11/193:05 pm
BCN
-
STL
1 stop14h 49m
United Airlines
Deal found 6/7$803

Find flight deals from St. Louis to Barcelona-El Prat

Discover tips and strategies to find the most affordable flight options for your journey from St. Louis (STL) to Barcelona-El Prat (BCN). 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 10, 2026.

Most accurate provider

Ovago
3 stars

Most trusted provider

Ovago
3 stars

Round-trip from

$765
(American Airlines)

One-way from

$326
(Kiwi.com)

Popular in

June

Cheapest in

January

Average price

$1,481
Provider with most accurate pricing for Lambert-St Louis-Barcelona-El Prat flight deals.
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Provider most trusted by Cheapflights users for Lambert-St Louis-Barcelona-El Prat flights.
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From Lambert-St Louis to Barcelona-El Prat
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One-way flight from Lambert-St Louis to Barcelona-El Prat
Search Deals
Highest demand for flights based on searches. 26% potential increase in price ($308 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 7% potential price decrease ($58 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in June 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from St. Louis to Barcelona-El Prat 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 10, 2026.
Use the filters below to find and compare flights from St. Louis to Barcelona-El Prat Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Mon 11/16

2:00 pm-8:20 am

1 stop11h 20m

Barcelona-El Prat

Fri 11/20

1:35 pm-10:27 am

2 stops27h 52m

$783
Quickest round-trip

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Wed 7/29

12:10 pm-8:00 am

1 stop12h 50m

Barcelona-El Prat

Fri 8/14

12:00 pm-11:38 pm

1 stop18h 38m

$888

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Thu 10/1

6:00 am-8:00 am

2 stops19h 00m

Barcelona-El Prat

Sun 10/11

6:40 am-1:25 pm

1 stop13h 45m

$900

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Fri 8/28

7:00 am-8:00 am

3 stops18h 00m

Barcelona-El Prat

Sat 9/5

12:15 pm-4:34 pm

2 stops35h 19m

$992

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Sat 7/4

7:23 pm-2:20 pm

1 stop35h 57m

Barcelona-El Prat

Mon 7/13

1:50 pm-1:25 pm

1 stop30h 35m

$1,004

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Sat 7/25

12:10 pm-8:00 am

1 stop12h 50m

Barcelona-El Prat

Wed 8/5

11:15 am-11:44 pm

2 stops19h 29m

$1,038

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Sat 11/21

5:20 pm-8:20 am

1 stop32h 00m

Barcelona-El Prat

Sat 11/28

1:35 pm-10:54 pm

2 stops16h 19m

$1,079

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Sun 8/9

8:20 am-10:10 pm

2 stops30h 50m

Barcelona-El Prat

Fri 8/14

8:00 am-7:45 pm

2 stops18h 45m

$1,118

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Fri 7/31

1:13 pm-8:00 am

2 stops35h 47m

Barcelona-El Prat

Sun 8/9

6:00 am-3:46 pm

2 stops16h 46m

$1,120
Cheapest one-way

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Tue 10/13

9:35 pm-10:40 pm

1 stop18h 05m

$355

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/9

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

Compare providers for flights from St. Louis to Barcelona-El Prat

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 Barcelona-El Prat in June.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
AranGrantPrice Accuracy3 starsTrust Score*3 stars
OvagoPrice Accuracy3 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
Justfly.comPrice 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 St. Louis-Barcelona-El Prat Airport flights, users find the pricing of Ovago to be most consistent on Cheapflights vs. Ovago Users can find the same prices on St. Louis-Barcelona-El Prat Airport flight deals on Cheapflights vs. Ovago >95% of the time. Price accuracy is based on data collected from St. Louis-Barcelona-El Prat Airport flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on St. Louis-Barcelona-El Prat Airport 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-Barcelona-El Prat Airport 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 Barcelona-El Prat

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

How far ahead should I book a flight from St. Louis to Barcelona-El Prat Airport?

The best time to book flights from St. Louis to Barcelona-El Prat Airport is 81 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 Barcelona-El Prat Airport?

Currently, January is the cheapest month in which you can book a flight from St. Louis to Barcelona-El Prat Airport (average of $531). Flying from St. Louis to Barcelona-El Prat Airport in June is currently the most expensive (average of $1,481). 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 Barcelona-El Prat Airport?

Reviews of airlines servicing Barcelona-El Prat

Get insights into the airlines that provide service to Barcelona-El Prat. 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 Barcelona-El Prat. Reviews last updated June 10, 2026.
Peruse reviews from past customers who have flown with United Airlines,American Airlines, andAir Canada from St. Louis to Barcelona-El Prat Airport to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
9,802 reviews

Crew

8.1

Food

6.6

Boarding

7.7

Comfort

7.3

Overall

7.4

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Dynasty,May 2026

LAX - EWR

The food wasn’t nice - Hosts were not that kind.
United Airlines
7.4
Good
9,802 reviews
United Airlines
7.4
Good
9,802 reviews

Crew

8.1

Food

6.6

Boarding

7.7

Comfort

7.3

Overall

7.4

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Dynasty,May 2026

LAX - EWR

The food wasn’t nice - Hosts were not that kind.
American Airlines
7.1
Good
11,640 reviews
United Airlines
7.4
Good
9,802 reviews

Crew

8.1

Food

6.6

Boarding

7.7

Comfort

7.3

Overall

7.4

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Dynasty,May 2026

LAX - EWR

The food wasn’t nice - Hosts were not that kind.
Air Canada
7.1
Good
11,154 reviews
United Airlines
7.4
Good
9,802 reviews

Crew

8.1

Food

6.6

Boarding

7.7

Comfort

7.3

Overall

7.4

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Dynasty,May 2026

LAX - EWR

The food wasn’t nice - Hosts were not that kind.
Lufthansa
6.8
Okay
8,052 reviews
United Airlines
7.4
Good
9,802 reviews

Crew

8.1

Food

6.6

Boarding

7.7

Comfort

7.3

Overall

7.4

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Dynasty,May 2026

LAX - EWR

The food wasn’t nice - Hosts were not that kind.
British Airways
6.7
Okay
8,035 reviews
United Airlines
7.4
Good
9,802 reviews

Crew

8.1

Food

6.6

Boarding

7.7

Comfort

7.3

Overall

7.4

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Dynasty,May 2026

LAX - EWR

The food wasn’t nice - Hosts were not that kind.

Related info for your journey

Find useful and relevant information for your journey from St. Louis to Barcelona-El Prat. 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 from for flights from St. Louis to Barcelona-El Prat?

    Lambert-St Louis (STL) is the airport you will fly out of if you book a flight from St. Louis to Barcelona-El Prat. You should not have trouble finding flights to Barcelona-El Prat from Lambert-St Louis; the airport handles an average of 0 outbound flights to Barcelona-El Prat per day. You should also have plenty of airline options to choose from since 7 airlines have flights from the St. Louis airport to Barcelona-El Prat. It is only a 12.7 mi journey to Lambert-St Louis (STL) from St. Louis’s city center.

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

    For as low as $783, United Airlines can have you in Barcelona-El Prat Airport from St. Louis in 11h 20m. There are 4638 mi between St. Louis and Barcelona-El Prat Airport.

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

    Our cheapest airline available from St. Louis to Barcelona-El Prat Airport is Lufthansa. Our recent data shows that you can find tickets from as low as $510 on this airline. Additional options worth looking into are British Airways and Delta, starting at $540 and $552 round-trip. Lufthansa is priced at 39% lower than the current average price of a flight leaving 3 months from now.

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

    One-way options have recently been found by users for as low as $266 on Air Canada. Other airlines that offer cheap prices include Delta from $292 and United Airlines from $302 one-way.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from St. Louis to Barcelona-El Prat 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 St. Louis to Barcelona-El Prat Airport?

    Currently, January is the cheapest month in which you can book a flight from St. Louis to Barcelona-El Prat Airport (average of $531). Flying from St. Louis to Barcelona-El Prat Airport in June is currently the most expensive (average of $1,481). 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
Roses
Calella
L'Hospitalet de Llobregat
Cadaques
El Prat de Llobregat
Badalona

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for St. Louis to Barcelona-El Prat

See prices for flight routes from nearby airports that may be better suited for you.
Kansas City to Barcelona-El Prat flights

Top 7 airlines flying from St. Louis to Barcelona-El Prat

Discover the top 7 airlines that operate flights from St. Louis to Barcelona-El Prat. 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 10, 2026.
AirlineCheapestAverageFlexibilityOn-time
LufthansaCheapest$510Average$985FlexibilityNo cancel feeOn-time76%
British AirwaysCheapest$540Average$873FlexibilityNo cancel feeOn-time70%
DeltaCheapest$552Average$777FlexibilityNo cancel feeOn-timeN/A
Air CanadaCheapest$560Average$1,023FlexibilityNo cancel feeOn-time67%
United AirlinesCheapest$567Average$957FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$629Average$935FlexibilityNo cancel feeOn-time71%
IberiaCheapest$637Average$847FlexibilityNo cancel feeOn-time77%

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