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Barcelona-El Prat

$396+ 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 4/10. Fares are subject to change and may not be available on all flights or dates of travel.
STL — BCN
Mar 31 — Apr 71
Mon 3/31
Mon 4/7
1 adult, Economy
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Cheapflights Tip: The best prices from Lambert-St Louis to Barcelona-El Prat are usually found in February or January, booked 29 days in advance, depart on a Tuesday or Wednesday and return on a Monday

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 March 26, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$818
(Mytrip)

One-way from

$396
(Kiwi.com)

Popular in

June

Cheapest in

February

Average price

$938
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
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Highest demand for flights based on searches. 20% potential increase in price ($256 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 March 2025
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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 March 26, 2025.

This Mytrip deal was found by Cheapflights users on 3/25. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/45:15 pmSTL - BCN
3 stops31h 35mMultiple Airlines
Tue 5/2012:10 pmBCN - STL
3 stops35h 35mMultiple Airlines
Deal found 3/25$818
This United deal was found by Cheapflights users on 3/24. 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 United is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/11:30 pmSTL - BCN
1 stop11h 20mUnited Airlines
Sat 9/1312:15 pmBCN - STL
2 stops33h 18mUnited Airlines
Deal found 3/24$984
This Ovago deal was found by Cheapflights users on 3/25. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/54:05 pmSTL - BCN
2 stops19h 05mScandinavian Airlines
Sun 5/117:00 pmBCN - STL
2 stops32h 39mScandinavian Airlines
Deal found 3/25$993
This Air Canada deal was found by Cheapflights users on 3/24. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/11:30 pmSTL - BCN
1 stop11h 20mAir Canada
Sat 9/1312:15 pmBCN - STL
1 stop14h 42mAir Canada
Deal found 3/24$996
This Cheapflightsfares deal was found by Cheapflights users on 3/25. 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.
Tue 9/232:01 pmSTL - BCN
1 stop13h 09mIberia
Tue 9/3010:45 amBCN - STL
1 stop16h 09mIberia
Deal found 3/25$999
This Gurufare deal was found by Cheapflights users on 3/25. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/256:06 amSTL - BCN
1 stop21h 24mBritish Airways
Mon 10/68:25 pmBCN - STL
2 stops26h 43mBritish Airways
Deal found 3/25$1,099
This StudentUniverse deal was found by Cheapflights users on 3/24. 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 StudentUniverse is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/11:20 pmSTL - BCN
2 stops23h 30mAustrian Airlines
Mon 7/78:40 pmBCN - STL
2 stops31h 25mAustrian Airlines
Deal found 3/24$1,129
This Air France deal was found by Cheapflights users on 3/25. 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 Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/1710:45 amSTL - BCN
2 stops13h 30mAir France
Thu 7/249:30 amBCN - STL
1 stop13h 28mAir France
Deal found 3/25$1,195
This Delta deal was found by Cheapflights users on 3/25. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/172:18 pmSTL - BCN
2 stops18h 22mDelta
Thu 7/246:20 amBCN - STL
2 stops16h 38mDelta
Deal found 3/25$1,227
This Gurufare deal was found by Cheapflights users on 3/25. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/125:33 pmSTL - BCN
2 stops21h 07mLufthansa
Mon 4/214:25 pmBCN - STL
2 stops30h 22mLufthansa
Deal found 3/25$1,304
This FlightHub deal was found by Cheapflights users on 3/25. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/266:00 amSTL - BCN
2 stops33h 25mAer Lingus
Wed 6/411:05 pmBCN - STL
2 stops40h 00mAer Lingus
Deal found 3/25$1,427
This American Airlines deal was found by Cheapflights users on 3/25. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/126:15 amSTL - BCN
1 stop19h 50mAmerican Airlines
Mon 4/216:30 pmBCN - STL
1 stop21h 12mAmerican Airlines
Deal found 3/25$1,531

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 March 26, 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

Sun 5/4

5:15 pm-7:50 am

3 stops31h 35m

Barcelona-El Prat

Tue 5/20

12:10 pm-4:45 pm

3 stops35h 35m

$818

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Mon 9/1

1:30 pm-7:50 am

1 stop11h 20m

Barcelona-El Prat

Sat 9/13

12:15 pm-2:33 pm

2 stops33h 18m

$984

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Mon 5/5

4:05 pm-6:10 pm

2 stops19h 05m

Barcelona-El Prat

Sun 5/11

7:00 pm-8:39 pm

2 stops32h 39m

$993

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Mon 9/1

1:30 pm-7:50 am

1 stop11h 20m

Barcelona-El Prat

Sat 9/13

12:15 pm-7:57 pm

1 stop14h 42m

$996

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Mon 8/25

4:23 pm-10:30 am

1 stop11h 07m

Barcelona-El Prat

Mon 9/1

12:20 pm-10:30 pm

1 stop17h 10m

$1,057

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Tue 5/6

1:45 pm-9:05 am

1 stop12h 20m

Barcelona-El Prat

Mon 5/12

9:10 pm-3:21 pm

2 stops25h 11m

$1,103

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Tue 7/1

1:20 pm-7:50 pm

2 stops23h 30m

Barcelona-El Prat

Mon 7/7

8:40 pm-9:05 pm

2 stops31h 25m

$1,129

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Thu 7/17

10:45 am-7:15 am

2 stops13h 30m

Barcelona-El Prat

Thu 7/24

9:30 am-3:58 pm

1 stop13h 28m

$1,195

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Thu 7/17

2:18 pm-3:40 pm

2 stops18h 22m

Barcelona-El Prat

Thu 7/24

6:20 am-3:58 pm

2 stops16h 38m

$1,227

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Sat 4/12

5:33 pm-9:40 pm

2 stops21h 07m

Barcelona-El Prat

Mon 4/21

4:25 pm-3:47 pm

2 stops30h 22m

$1,304

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/25

Showing 1-10 of 22 results
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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 March.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
AranGrantPrice Accuracy3 starsTrust Score*1 star
FlightHubPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
business-class.comPrice Accuracy3 starsTrust Score*3 stars
ScholarTripPrice Accuracy3 starsTrust Score*3 stars
CheapOairPrice Accuracy1 starTrust 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 March 21, 2025.

The best time to book flights from St. Louis to Barcelona-El Prat Airport is 29 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 $523). Flying from St. Louis to Barcelona-El Prat Airport in June is currently the most expensive (average of $1,080). 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 March 26, 2025.

It’s optimal to fly from St. Louis to Barcelona-El Prat Airport in the morning. By choosing this option you can save up to 14% on the cost of your flight, compared to a flight in the afternoon.

Rainfall in Barcelona-El Prat by month

Plan your trip to Barcelona-El Prat by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Barcelona-El Prat Airport ranges from 0.8 - 3.6 inches per month. October is typically the wettest month, when rainfall can reach 3.6 in. July is typically the driest time to visit Barcelona-El Prat Airport when rainfall is around 0.8 in.

Temperature in Barcelona-El Prat by month

Plan your trip to Barcelona-El Prat by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Barcelona-El Prat Airport, use this chart to help with planning. For those seeking warmer temperatures, August is the ideal time of year to visit, when temperatures reach an average of 75.2 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 48.2 F).

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 March 26, 2025.
Delta
8.0
Very good
7,891 reviews

Comfort

8.0

Food

7.3

Overall

8.0

Entertainment

7.9

Crew

8.5

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Delta
8.0
Very good
7,891 reviews
Delta
8.0
Very good
7,891 reviews

Comfort

8.0

Food

7.3

Overall

8.0

Entertainment

7.9

Crew

8.5

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
KLM
7.8
Good
1,318 reviews
Delta
8.0
Very good
7,891 reviews

Comfort

8.0

Food

7.3

Overall

8.0

Entertainment

7.9

Crew

8.5

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Finnair
7.6
Good
1,266 reviews
Delta
8.0
Very good
7,891 reviews

Comfort

8.0

Food

7.3

Overall

8.0

Entertainment

7.9

Crew

8.5

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Austrian Airlines
7.5
Good
769 reviews
Delta
8.0
Very good
7,891 reviews

Comfort

8.0

Food

7.3

Overall

8.0

Entertainment

7.9

Crew

8.5

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Air France
7.4
Good
1,423 reviews
Delta
8.0
Very good
7,891 reviews

Comfort

8.0

Food

7.3

Overall

8.0

Entertainment

7.9

Crew

8.5

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

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 9 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.

  • 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 United Airlines. Our recent data shows that you can find tickets from as low as $984 on this airline. Additional options worth looking into are Scandinavian Airlines and Air Canada, starting at $993 and $996 round-trip.

  • 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 $603 on Air Canada. Other airlines that offer cheap prices include British Airways from $608 and American Airlines from $718 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 $523). Flying from St. Louis to Barcelona-El Prat Airport in June is currently the most expensive (average of $1,080). 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 St. Louis?

Book flights to St. Louis if you plan to visit one of these locations
Calella
Castelldefels
Cadaques
L'Hospitalet de Llobregat
El Prat de Llobregat
Badalona
Pineda de Mar
Santa Susanna
Tossa de Mar

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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 9 airlines flying from St. Louis to Barcelona-El Prat

Discover the top 9 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 March 26, 2025.
AirlineCheapestAverageFlexibilityOn-time
LufthansaCheapest$530Average$930FlexibilityNo cancel feeOn-time76%
KLMCheapest$540Average$854FlexibilityNo cancel feeOn-time75%
British AirwaysCheapest$602Average$968FlexibilityNo cancel feeOn-time70%
DeltaCheapest$602Average$895FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$632Average$1,046FlexibilityNo cancel feeOn-time71%
Air FranceCheapest$645Average$777FlexibilityNo cancel feeOn-time77%
IberiaCheapest$689Average$1,081FlexibilityNo cancel feeOn-time77%
United AirlinesCheapest$697Average$1,099FlexibilityNo cancel feeOn-time69%
Air CanadaCheapest$729Average$1,100FlexibilityNo cancel feeOn-time67%
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