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Barcelona-El Prat

$330+ 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 1/16. Fares are subject to change and may not be available on all flights or dates of travel.
STL — BCN
Dec 6 — Dec 131
Sat 12/6
Sat 12/13
1 adult, Economy
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1. Tell us where you want to go

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Cheapflights Tip: The best prices from Lambert-St Louis to Barcelona-El Prat are usually found in February or November, booked 85 days in advance, depart on a Tuesday or Wednesday and return on a Monday

Find 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 November 6, 2025.

This United Airlines deal was found by Cheapflights users on 11/5. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/41:35 pmSTL - BCN
2 stops37h 00mUnited Airlines
Thu 12/111:35 pmBCN - STL
2 stops34h 28mUnited Airlines
Deal found 11/5$461
This KLM deal was found by Cheapflights users on 11/4. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/45:12 pmSTL - BCN
1 stop32h 28mKLM
Thu 12/1110:55 amBCN - STL
1 stop17h 07mKLM
Deal found 11/4$464
This United deal was found by Cheapflights users on 11/4. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/45:31 pmSTL - BCN
1 stop32h 29mMultiple Airlines
Tue 11/111:35 pmBCN - STL
2 stops31h 49mMultiple Airlines
Deal found 11/4$466
This United Airlines deal was found by Cheapflights users on 11/4. 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.
Tue 11/43:14 pmSTL - BCN
2 stops16h 01mUnited Airlines
Tue 11/111:35 pmBCN - STL
2 stops31h 49mUnited Airlines
Deal found 11/4$469
This Air Canada deal was found by Cheapflights users on 11/5. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/2612:31 pmSTL - BCN
2 stops14h 04mAir Canada
Thu 12/41:35 pmBCN - STL
2 stops32h 54mAir Canada
Deal found 11/5$480
This Air Canada deal was found by Cheapflights users on 11/4. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/2612:31 pmSTL - BCN
2 stops14h 04mMultiple Airlines
Thu 12/412:45 pmBCN - STL
2 stops33h 44mMultiple Airlines
Deal found 11/4$482
This United Airlines deal was found by Cheapflights users on 11/6. 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 11/266:43 pmSTL - BCN
1 stop11h 27mUnited Airlines
Thu 12/46:50 amBCN - STL
2 stops22h 55mUnited Airlines
Deal found 11/6$486
This Delta deal was found by Cheapflights users on 11/5. 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.
Thu 11/276:40 amSTL - BCN
2 stops18h 20mDelta
Thu 12/1110:55 amBCN - STL
1 stop17h 07mDelta
Deal found 11/5$488
This KLM deal was found by Cheapflights users on 11/4. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/264:30 pmSTL - BCN
1 stop32h 30mKLM
Thu 12/410:55 amBCN - STL
1 stop14h 01mKLM
Deal found 11/4$490
This Air Canada deal was found by Cheapflights users on 11/6. 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.
Mon 11/244:05 pmSTL - BCN
2 stops15h 00mMultiple Airlines
Tue 12/212:50 pmBCN - STL
2 stops33h 39mMultiple Airlines
Deal found 11/6$493
This United Airlines deal was found by Cheapflights users on 11/6. 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 11/246:43 pmSTL - BCN
1 stop11h 27mUnited Airlines
Tue 12/21:50 pmBCN - STL
1 stop31h 05mUnited Airlines
Deal found 11/6$495

Cheap 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 November 6, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$449
(Delta)

One-way from

$330
(Kiwi.com)

Popular in

June

Cheapest in

February

Average price

$669
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. 24% potential increase in price ($295 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($37 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in November 2025
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 November 6, 2025.
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

Thu 12/4

8:30 am-8:20 am

1 stop16h 50m

Barcelona-El Prat

Thu 12/11

1:35 pm-10:45 pm

2 stops40h 10m

$461

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Thu 12/4

5:12 pm-8:40 am

1 stop32h 28m

Barcelona-El Prat

Thu 12/11

10:55 am-9:02 pm

1 stop17h 07m

$464

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Sat 1/24

8:30 am-9:00 am

2 stops17h 30m

Barcelona-El Prat

Sat 1/31

1:35 pm-2:30 pm

2 stops31h 55m

$465

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Tue 1/6

6:40 pm-5:45 pm

2 stops40h 05m

Barcelona-El Prat

Tue 1/13

1:35 pm-5:43 pm

2 stops35h 08m

$481

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Thu 1/15

4:05 pm-9:35 am

2 stops34h 30m

Barcelona-El Prat

Sun 2/1

6:50 am-3:29 pm

2 stops39h 39m

$484

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Wed 11/26

11:07 am-7:05 am

1 stop12h 58m

Barcelona-El Prat

Thu 12/4

12:30 pm-8:21 pm

1 stop14h 51m

$484

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Wed 11/26

5:24 pm-1:10 pm

1 stop12h 46m

Barcelona-El Prat

Thu 12/4

6:50 am-10:45 pm

2 stops22h 55m

$486

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Sat 1/24

1:00 pm-8:40 am

1 stop12h 40m

Barcelona-El Prat

Sat 1/31

10:15 am-8:45 pm

2 stops17h 30m

$488

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Wed 11/26

4:30 pm-8:00 am

1 stop32h 30m

Barcelona-El Prat

Thu 12/4

10:55 am-5:56 pm

1 stop14h 01m

$490

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Mon 11/24

4:05 pm-2:05 pm

2 stops15h 00m

Barcelona-El Prat

Tue 12/2

12:50 pm-3:29 pm

2 stops33h 39m

$493

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/4

Showing 1-10 of 16 results
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 November.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
AranGrantPrice Accuracy2 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
OvagoPrice Accuracy2 starsTrust Score*2 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 eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on St. Louis-Barcelona-El Prat Airport flight deals on Cheapflights vs. eDreams >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 eDreams the most. eDreams 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 October 31, 2025.

The best time to book flights from St. Louis to Barcelona-El Prat Airport is 85 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, November is the cheapest month in which you can book a flight from St. Louis to Barcelona-El Prat Airport (average of $536). Flying from St. Louis to Barcelona-El Prat Airport in June is currently the most expensive (average of $1,095). 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 STL to BCN?

Find hourly flight availability from St. Louis to Barcelona-El Prat. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated November 6, 2025.

It’s optimal to fly from St. Louis to Barcelona-El Prat Airport in the evening. By choosing this option you can save up to 22% on the cost of your flight, compared to a flight in the afternoon.

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 November 6, 2025.
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
9,007 reviews

Comfort

7.3

Entertainment

7.1

Boarding

7.7

Overall

7.4

Crew

8.1

Food

6.6

Reviews

1 / 20
2.0
Mediocre

Sebrena,Oct 2025

IAH - RSW

The worst that I have ever experienced in my life so bad if it was free I'm not ever going to use your Airline again I dont believe ..... very disappointed 😞 😔0000000000000
United Airlines
7.4
Good
9,007 reviews
United Airlines
7.4
Good
9,007 reviews

Comfort

7.3

Entertainment

7.1

Boarding

7.7

Overall

7.4

Crew

8.1

Food

6.6

Reviews

1 / 20
2.0
Mediocre

Sebrena,Oct 2025

IAH - RSW

The worst that I have ever experienced in my life so bad if it was free I'm not ever going to use your Airline again I dont believe ..... very disappointed 😞 😔0000000000000
American Airlines
7.2
Good
11,040 reviews
United Airlines
7.4
Good
9,007 reviews

Comfort

7.3

Entertainment

7.1

Boarding

7.7

Overall

7.4

Crew

8.1

Food

6.6

Reviews

1 / 20
2.0
Mediocre

Sebrena,Oct 2025

IAH - RSW

The worst that I have ever experienced in my life so bad if it was free I'm not ever going to use your Airline again I dont believe ..... very disappointed 😞 😔0000000000000
Air Canada
7.1
Good
10,416 reviews
United Airlines
7.4
Good
9,007 reviews

Comfort

7.3

Entertainment

7.1

Boarding

7.7

Overall

7.4

Crew

8.1

Food

6.6

Reviews

1 / 20
2.0
Mediocre

Sebrena,Oct 2025

IAH - RSW

The worst that I have ever experienced in my life so bad if it was free I'm not ever going to use your Airline again I dont believe ..... very disappointed 😞 😔0000000000000
Iberia
7.0
Good
3,007 reviews
United Airlines
7.4
Good
9,007 reviews

Comfort

7.3

Entertainment

7.1

Boarding

7.7

Overall

7.4

Crew

8.1

Food

6.6

Reviews

1 / 20
2.0
Mediocre

Sebrena,Oct 2025

IAH - RSW

The worst that I have ever experienced in my life so bad if it was free I'm not ever going to use your Airline again I dont believe ..... very disappointed 😞 😔0000000000000
British Airways
6.7
Okay
7,500 reviews
United Airlines
7.4
Good
9,007 reviews

Comfort

7.3

Entertainment

7.1

Boarding

7.7

Overall

7.4

Crew

8.1

Food

6.6

Reviews

1 / 20
2.0
Mediocre

Sebrena,Oct 2025

IAH - RSW

The worst that I have ever experienced in my life so bad if it was free I'm not ever going to use your Airline again I dont believe ..... very disappointed 😞 😔0000000000000

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 $461, United Airlines can have you in Barcelona-El Prat Airport from St. Louis in 16h 50m. 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 Delta. Our recent data shows that you can find tickets from as low as $552 on this airline. Additional options worth looking into are Lufthansa and United Airlines, starting at $568 and $578 round-trip. Delta is priced at 40% lower than the current average price of a flight leaving 3 months from now.

  • 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, November is the cheapest month in which you can book a flight from St. Louis to Barcelona-El Prat Airport (average of $536). Flying from St. Louis to Barcelona-El Prat Airport in June is currently the most expensive (average of $1,095). 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
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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 November 6, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$552Average$1,010FlexibilityNo cancel feeOn-timeN/A
LufthansaCheapest$568Average$931FlexibilityNo cancel feeOn-time76%
United AirlinesCheapest$578Average$1,015FlexibilityNo cancel feeOn-time69%
British AirwaysCheapest$590Average$932FlexibilityNo cancel feeOn-time70%
KLMCheapest$590Average$745FlexibilityNo cancel feeOn-time75%
Air CanadaCheapest$624Average$1,239FlexibilityNo cancel feeOn-time67%
IberiaCheapest$631Average$944FlexibilityNo cancel feeOn-time77%
American AirlinesCheapest$648Average$1,111FlexibilityNo cancel feeOn-time71%

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