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Barcelona-El Prat

$237+ 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 2/8. Fares are subject to change and may not be available on all flights or dates of travel.
STL — BCN
Feb 25 — Mar 41
Wed 2/25
Wed 3/4
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 January 26, 2026.

This Cheapflightsfares deal was found by Cheapflights users on 1/26. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/2511:22 am
STL
-
BCN
1 stop12h 43m
Finnair
Wed 3/43:05 pm
BCN
-
STL
1 stop15h 51m
Finnair
Deal found 1/26$469
This United Airlines deal was found by Cheapflights users on 1/25. 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 3/17:41 am
STL
-
BCN
2 stops18h 19m
United Airlines
Tue 3/1012:35 pm
BCN
-
STL
2 stops32h 07m
United Airlines
Deal found 1/25$470
This oojo deal was found by Cheapflights users on 1/26. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/2511:59 am
STL
-
BCN
2 stops16h 11m
British Airways
Wed 3/412:30 pm
BCN
-
STL
1 stop17h 34m
British Airways
Deal found 1/26$473
This oojo deal was found by Cheapflights users on 1/25. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/1411:44 am
STL
-
BCN
2 stops19h 31m
British Airways
Tue 4/283:15 pm
BCN
-
STL
1 stop35h 15m
British Airways
Deal found 1/25$479
This oojo deal was found by Cheapflights users on 1/26. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/137:40 pm
STL
-
BCN
2 stops14h 55m
British Airways
Mon 4/278:35 pm
BCN
-
STL
2 stops26h 41m
British Airways
Deal found 1/26$482
This Delta deal was found by Cheapflights users on 1/26. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/47:10 am
STL
-
BCN
1 stop18h 30m
Delta
Mon 3/1612:15 pm
BCN
-
STL
2 stops27h 31m
Delta
Deal found 1/26$503
This Cheapflightsfares deal was found by Cheapflights users on 1/25. 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.
Sun 3/111:46 am
STL
-
BCN
1 stop14h 04m
Finnair
Tue 3/109:35 am
BCN
-
STL
1 stop15h 54m
Finnair
Deal found 1/25$518

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 January 26, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$463
(Mytrip)

One-way from

$237
(Kiwi.com)

Popular in

June

Cheapest in

January

Average price

$505
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.
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. 26% potential increase in price ($303 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($36 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 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 January 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

St. Louis

Fly to

Barcelona-El Prat

Route

Depart

Return

Price

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Sun 3/1

7:41 am-9:00 am

2 stops18h 19m

Barcelona-El Prat

Tue 3/10

12:35 pm-2:42 pm

2 stops32h 07m

$470

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Tue 4/14

11:44 am-2:15 pm

2 stops19h 31m

Barcelona-El Prat

Tue 4/28

3:15 pm-7:30 pm

1 stop35h 15m

$479

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Tue 4/14

9:10 am-9:00 am

2 stops16h 50m

Barcelona-El Prat

Sun 4/26

6:40 am-1:25 pm

1 stop13h 45m

$533

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Wed 3/4

11:22 am-1:05 pm

1 stop18h 43m

Barcelona-El Prat

Mon 3/16

6:10 pm-11:29 am

1 stop23h 19m

$534

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Mon 4/13

9:59 am-12:50 pm

1 stop19h 51m

Barcelona-El Prat

Mon 4/27

11:00 am-8:30 am

1 stop28h 30m

$540

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Wed 3/11

7:00 pm-5:45 pm

2 stops16h 45m

Barcelona-El Prat

Wed 3/18

10:30 am-7:13 pm

1 stop14h 43m

$590

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Tue 3/31

8:30 am-8:20 am

1 stop16h 50m

Barcelona-El Prat

Tue 4/14

12:15 pm-9:57 pm

2 stops40h 42m

$610

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Sun 5/10

7:30 am-9:20 am

1 stop18h 50m

Barcelona-El Prat

Wed 5/20

12:15 pm-8:05 pm

1 stop14h 50m

$614

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Wed 4/22

10:00 am-5:55 pm

2 stops24h 55m

Barcelona-El Prat

Wed 5/6

1:15 pm-2:32 pm

2 stops32h 17m

$623

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Sun 2/8

5:42 pm-8:40 pm

3 stops43h 58m

$264

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/26

Showing 1-10 of 15 results
1
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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 January.
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

*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?

Use this chart to determine the optimal time to book a round-trip flight from St. Louis to Barcelona-El Prat. Price data was last updated on January 23, 2026.

The best time to book flights from St. Louis to Barcelona-El Prat Airport is 10 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 $487). Flying from St. Louis to Barcelona-El Prat Airport in June is currently the most expensive (average of $1,084). 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 January 26, 2026.
Peruse reviews from past customers who have flown with United Airlines, American Airlines, and Air 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
9,198 reviews

Crew

8.1

Comfort

7.3

Food

6.6

Boarding

7.7

Entertainment

7.1

Overall

7.4

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family
United Airlines
7.4
Good
9,198 reviews
United Airlines
7.4
Good
9,198 reviews

Crew

8.1

Comfort

7.3

Food

6.6

Boarding

7.7

Entertainment

7.1

Overall

7.4

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family
American Airlines
7.2
Good
11,189 reviews
United Airlines
7.4
Good
9,198 reviews

Crew

8.1

Comfort

7.3

Food

6.6

Boarding

7.7

Entertainment

7.1

Overall

7.4

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family
Air Canada
7.1
Good
10,656 reviews
United Airlines
7.4
Good
9,198 reviews

Crew

8.1

Comfort

7.3

Food

6.6

Boarding

7.7

Entertainment

7.1

Overall

7.4

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family
Iberia
7.0
Good
3,098 reviews
United Airlines
7.4
Good
9,198 reviews

Crew

8.1

Comfort

7.3

Food

6.6

Boarding

7.7

Entertainment

7.1

Overall

7.4

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family
British Airways
6.7
Okay
7,700 reviews
United Airlines
7.4
Good
9,198 reviews

Crew

8.1

Comfort

7.3

Food

6.6

Boarding

7.7

Entertainment

7.1

Overall

7.4

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family

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 8 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 $470, United Airlines can have you in Barcelona-El Prat Airport from St. Louis in 18h 19m. There are 4638 mi between St. Louis and Barcelona-El Prat Airport. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • 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 United Airlines, starting at $540 and $567 round-trip. Lufthansa is priced at 40% 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 $299 on Air Canada. Other airlines that offer cheap prices include American Airlines from $350 and United Airlines from $443 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 $487). Flying from St. Louis to Barcelona-El Prat Airport in June is currently the most expensive (average of $1,084). 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
Calella
Roses
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
Springfield to Barcelona-El Prat flights
Joplin to Barcelona-El Prat flights

Top 8 airlines flying from St. Louis to Barcelona-El Prat

Discover the top 8 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 January 26, 2026.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest$540Average$850FlexibilityNo cancel feeOn-time70%
United AirlinesCheapest$567Average$982FlexibilityNo cancel feeOn-time69%
LufthansaCheapest$568Average$891FlexibilityNo cancel feeOn-time76%
DeltaCheapest$585Average$984FlexibilityNo cancel feeOn-timeN/A
KLMCheapest$590Average$745FlexibilityNo cancel feeOn-time75%
Air CanadaCheapest$624Average$1,208FlexibilityNo cancel feeOn-time67%
IberiaCheapest$631Average$1,031FlexibilityNo cancel feeOn-time77%
American AirlinesCheapest$632Average$1,029FlexibilityNo cancel feeOn-time71%

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