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Barcelona-El Prat

$351+ 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 9/27. Fares are subject to change and may not be available on all flights or dates of travel.
STL — BCN
May 26 — Jun 21
Tue 5/26
Tue 6/2
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 April 26, 2026.

This Gotogate deal was found by Cheapflights users on 4/24. 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 9/228:55 am
STL
-
BCN
1 stop17h 25m
Multiple Airlines
Tue 9/296:40 am
BCN
-
STL
1 stop13h 45m
Multiple Airlines
Deal found 4/24$741
This Air Canada deal was found by Cheapflights users on 4/26. 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.
Sat 11/79:23 am
STL
-
BCN
2 stops41h 12m
Air Canada
Wed 11/111:35 pm
BCN
-
STL
2 stops31h 43m
Air Canada
Deal found 4/26$757
This United Airlines deal was found by Cheapflights users on 4/26. 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 11/106:30 am
STL
-
BCN
2 stops20h 05m
United Airlines
Fri 11/135:50 am
BCN
-
STL
1 stop15h 05m
United Airlines
Deal found 4/26$766
This United Airlines deal was found by Cheapflights users on 4/26. 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 11/87:30 am
STL
-
BCN
1 stop18h 30m
United Airlines
Fri 11/135:50 am
BCN
-
STL
1 stop15h 05m
United Airlines
Deal found 4/26$767
This United Airlines deal was found by Cheapflights users on 4/26. 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 11/88:00 am
STL
-
BCN
2 stops18h 35m
United Airlines
Wed 11/116:50 am
BCN
-
STL
1 stop14h 05m
United Airlines
Deal found 4/26$770
This United Airlines deal was found by Cheapflights users on 4/26. 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 11/99:23 am
STL
-
BCN
2 stops15h 57m
United Airlines
Wed 11/116:50 am
BCN
-
STL
1 stop14h 05m
United Airlines
Deal found 4/26$772
This United Airlines deal was found by Cheapflights users on 4/26. 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 11/83:15 pm
STL
-
BCN
1 stop14h 55m
United Airlines
Tue 11/173:05 pm
BCN
-
STL
1 stop14h 49m
United Airlines
Deal found 4/26$773
This United Airlines deal was found by Cheapflights users on 4/26. 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 11/106:30 am
STL
-
BCN
2 stops20h 05m
United Airlines
Tue 11/176:50 am
BCN
-
STL
2 stops23h 35m
United Airlines
Deal found 4/26$776
This United Airlines deal was found by Cheapflights users on 4/26. 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 11/910:23 am
STL
-
BCN
1 stop19h 47m
United Airlines
Thu 11/121:35 pm
BCN
-
STL
2 stops16h 50m
United Airlines
Deal found 4/26$777
This United Airlines deal was found by Cheapflights users on 4/26. 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 11/75:20 pm
STL
-
BCN
1 stop32h 40m
United Airlines
Fri 11/136:50 am
BCN
-
STL
1 stop14h 05m
United Airlines
Deal found 4/26$778
This United Airlines deal was found by Cheapflights users on 4/26. 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 11/75:20 pm
STL
-
BCN
1 stop32h 40m
United Airlines
Tue 11/173:05 pm
BCN
-
STL
1 stop14h 49m
United Airlines
Deal found 4/26$779

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 April 26, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$978
(Condor)

One-way from

$351
(Cheapflightsfares)

Popular in

June

Cheapest in

January

Average price

$634
Provider with most accurate pricing for Lambert-St Louis-Barcelona-El Prat flight deals.
Search Deals
Provider most trusted by Cheapflights users for Lambert-St Louis-Barcelona-El Prat flights.
Search Deals
From Lambert-St Louis to Barcelona-El Prat
Search Deals
One-way flight from Lambert-St Louis to Barcelona-El Prat
Search Deals
Highest demand for flights based on searches. 27% potential increase in price ($309 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 6% potential price decrease ($54 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 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 April 26, 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

Sun 9/20

5:00 am-8:00 am

2 stops20h 00m

Barcelona-El Prat

Sun 9/27

6:40 am-4:26 pm

2 stops16h 46m

$831

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Fri 8/7

6:00 am-9:20 am

2 stops20h 20m

Barcelona-El Prat

Fri 8/14

12:15 pm-8:37 am

2 stops27h 22m

$1,123

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Sat 7/25

7:23 pm-2:15 pm

1 stop35h 52m

Barcelona-El Prat

Wed 8/5

1:15 pm-2:02 pm

1 stop31h 47m

$1,134

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Wed 5/13

3:20 pm-2:05 pm

2 stops15h 45m

Barcelona-El Prat

Wed 5/27

12:15 pm-2:23 pm

2 stops33h 08m

$1,141

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Mon 5/18

7:05 am-9:20 am

1 stop19h 15m

Barcelona-El Prat

Mon 6/1

1:50 pm-1:25 pm

1 stop30h 35m

$1,171

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Fri 7/24

8:35 pm-1:15 pm

1 stop33h 40m

Barcelona-El Prat

Wed 8/5

1:15 pm-2:02 pm

1 stop31h 47m

$1,193

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Thu 7/23

6:00 am-1:15 pm

1 stop24h 15m

Barcelona-El Prat

Sat 8/1

1:15 pm-2:02 pm

1 stop31h 47m

$1,383
Quickest round-trip

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Tue 6/16

1:05 pm-8:00 am

1 stop11h 55m

Barcelona-El Prat

Sat 7/4

12:15 pm-6:42 pm

1 stop13h 27m

$1,446

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Fri 6/26

8:35 pm-1:15 pm

1 stop33h 40m

Barcelona-El Prat

Sun 7/5

1:15 pm-2:02 pm

1 stop31h 47m

$1,570

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Tue 6/16

6:35 am-8:35 am

2 stops43h 00m

Barcelona-El Prat

Sat 7/4

10:10 am-11:58 pm

3 stops44h 48m

$12,934

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/25

Showing 1-10 of 21 resultsSorted by cheapest first
1
2
3

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 April.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
AranGrantPrice Accuracy2 starsTrust Score*2 stars
OvagoPrice Accuracy2 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 FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on St. Louis-Barcelona-El Prat Airport flight deals on Cheapflights vs. FlightHub >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 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 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 $505). Flying from St. Louis to Barcelona-El Prat Airport in June is currently the most expensive (average of $1,421). 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 April 26, 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
9,659 reviews

Crew

8.1

Overall

7.4

Food

6.6

Entertainment

7.1

Comfort

7.3

Boarding

7.7

Reviews

1 / 20
8.0
Excellent

Anonymous,Apr 2026

DFW - EWR

The flight was on time. Crew was friendly. Will fly again. The seats was comfortable.
United Airlines
7.4
Good
9,659 reviews
United Airlines
7.4
Good
9,659 reviews

Crew

8.1

Overall

7.4

Food

6.6

Entertainment

7.1

Comfort

7.3

Boarding

7.7

Reviews

1 / 20
8.0
Excellent

Anonymous,Apr 2026

DFW - EWR

The flight was on time. Crew was friendly. Will fly again. The seats was comfortable.
American Airlines
7.1
Good
11,668 reviews
United Airlines
7.4
Good
9,659 reviews

Crew

8.1

Overall

7.4

Food

6.6

Entertainment

7.1

Comfort

7.3

Boarding

7.7

Reviews

1 / 20
8.0
Excellent

Anonymous,Apr 2026

DFW - EWR

The flight was on time. Crew was friendly. Will fly again. The seats was comfortable.
Air Canada
7.1
Good
10,973 reviews
United Airlines
7.4
Good
9,659 reviews

Crew

8.1

Overall

7.4

Food

6.6

Entertainment

7.1

Comfort

7.3

Boarding

7.7

Reviews

1 / 20
8.0
Excellent

Anonymous,Apr 2026

DFW - EWR

The flight was on time. Crew was friendly. Will fly again. The seats was comfortable.
Lufthansa
6.8
Okay
7,956 reviews
United Airlines
7.4
Good
9,659 reviews

Crew

8.1

Overall

7.4

Food

6.6

Entertainment

7.1

Comfort

7.3

Boarding

7.7

Reviews

1 / 20
8.0
Excellent

Anonymous,Apr 2026

DFW - EWR

The flight was on time. Crew was friendly. Will fly again. The seats was comfortable.
British Airways
6.7
Okay
7,917 reviews
United Airlines
7.4
Good
9,659 reviews

Crew

8.1

Overall

7.4

Food

6.6

Entertainment

7.1

Comfort

7.3

Boarding

7.7

Reviews

1 / 20
8.0
Excellent

Anonymous,Apr 2026

DFW - EWR

The flight was on time. Crew was friendly. Will fly again. The seats was comfortable.

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 $831, United Airlines can have you in Barcelona-El Prat Airport from St. Louis in 20h. 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 38% 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 $299 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 $505). Flying from St. Louis to Barcelona-El Prat Airport in June is currently the most expensive (average of $1,421). 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
Pineda de Mar

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 April 26, 2026.
AirlineCheapestAverageFlexibilityOn-time
LufthansaCheapest$510Average$985FlexibilityNo cancel feeOn-time76%
British AirwaysCheapest$540Average$824FlexibilityNo cancel feeOn-time70%
DeltaCheapest$552Average$745FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$560Average$939FlexibilityNo cancel feeOn-time69%
Air CanadaCheapest$576Average$1,054FlexibilityNo cancel feeOn-time67%
American AirlinesCheapest$607Average$981FlexibilityNo cancel feeOn-time71%
IberiaCheapest$631Average$732FlexibilityNo cancel feeOn-time77%

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